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Chemistry & Chemical Reactivity 9th Edition by John C. Kotz - Test Bank

Chemistry & Chemical Reactivity 9th Edition by John C. Kotz – Test Bank

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Chemistry & Chemical Reactivity 9th Edition by John C. Kotz – Test Bank

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Chapter_02_Atoms_Molecules_and_Ions

 

 

1. Which of the following statements concerning atomic structure is/are correct?

  1. Neutrons and electrons are found in space as a cloud around the nucleus.
  2. The nucleus contains all the positive charge of an atom.
  3. Electrons surround the nucleus and account for the majority of an atom’s volume.

 

  a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.1 Atomic Structure–Protons, Electrons, and Neutrons
QUESTION ID:   JFND-GO4R-EC3D-GPTZ

 

2. Atoms consist of three fundamental particles. What are these particles and their charges?

  a. proton (+1), neutron (neutral) and electron (−1)
  b. proton (−1), neutron (+1) and electron (neutral)
  c. proton (+1), neutron (−1) and electron (neutral)
  d. proton (neutral), neutron (+1) and electron (−1)
  e. proton (−1), neutron (neutral) and electron (+1)

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.1 Atomic Structure–Protons, Electrons, and Neutrons
2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GPTS

 

3. Rank the subatomic particles from least to greatest mass.

  a. electron mass = proton mass = neutron mass
  b. electron mass = neutron mass < proton mass
  c. electron mass = proton mass < neutron mass
  d. electron mass < proton mass < neutron mass
  e. electron mass < proton mass = neutron mass

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GPTI

 

4. Atomic number is the________ in the nucleus of an atom.

  a. number of electrons
  b. number of protons
  c. number of protons minus the number of neutrons
  d. sum of the number of electrons and neutrons
  e. sum of the number of neutrons and protons

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GPTW

 

5. The atomic number of fluorine is ____.

  a. 7A b. 9 c. 10 d. 19 e. 0

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP4N

 

6. Which of the following statements is/are CORRECT?

  1. A hydrogen atom with 1 proton and zero neutrons is assigned a mass of exactly 1 atoms mass unit.
  2. 1 atomic mass unit is equivalent to 9.11 × 10−28 g.
  3. A carbon atom with 6 protons and 6 neutrons is assigned a mass of exactly 12 atomic mass units.

 

  a. 1 only b. 2 only c. 3 only d. 1 and 2 e. 1, 2, and 3

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP4B

 

7. What is the mass number of an argon atom with 22 neutrons?

  a. 2 b. 18 c. 22 d. 40 e. 39.95

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP33

 

8. A neutral atom of the isotope 200Hg contains

  a. 200 neutrons and 280 electrons.
  b. 80 protons and 200 neutrons.
  c. 200 protons and 120 electrons.
  d. 200 protons, 80 neutrons, and 200 electrons.
  e. 80 protons and 120 neutrons.

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.2 Atomic Number and Atomic Mass
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GP3A

 

9. How many protons are there in an atom of vanadium-51?

  a. 29 b. 74 c. 22 d. 23 e. 28

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.2 Atomic Number and Atomic Mass
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GP4G

 

10. How many protons, neutrons, and electrons are in a neutral atom of 56Fe?

  a. 26 protons, 30 neutrons, 56 electrons
  b. 26 protons, 30 neutrons, 30 electrons
  c. 26 protons, 30 neutrons, 26 electrons
  d. 56 protons, 26 neutrons, 56 electrons
  e. 56 protons, 26 neutrons, 26 electrons

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.2 Atomic Number and Atomic Mass
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GP4F

 

11. What is the mass of chlorine-35 relative to carbon-12?

  a. 0.657 b. 0.522 c. 1.52 d. 2.92 e. 23

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP4R

 

12. Which of the following atoms contains the fewest protons?

  a. 232Th b. 231Pa c. 245Pu d. 238U e. 232Pa

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP4D

 

13. Which of the following atoms contains more protons than neutrons?

  a. b. c. d. e.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP3U

 

14. What is the atomic symbol for an element with 15 protons and 16 neutrons?

  a. b. c. d.
  e.            

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.2 Atomic Number and Atomic Mass
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GP31

 

15. What is the identity of ?

  a. Ni b. Zn c. Rn d. Ce e. Pd

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP3T

 

16. What is the atomic symbol for an element that has 30 neutrons and a mass number of 55?

  a. At b. Zn c. Co d. Mn e. Cs

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP3O

 

17. How many neutrons are there in an atom of cobalt-59 ?

  a. 27 b. 2 c. 86 d. 59
  e. 32            

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.2 Atomic Number and Atomic Mass
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GP3Z

 

18. Which of the following atoms contains the largest number of neutrons?

  a. b. c. d. e.

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP3S

 

19. An atom that has the same number of neutrons as is

  a. . b. . c. . d. .
  e. .            

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.2 Atomic Number and Atomic Mass
QUESTION ID:   JFND-GO4R-EC3D-GP3I

 

20. Two isotopes of a given element will have the same number of ____, but a different number of ____ in their nucleus.

  a. protons, electrons
  b. electrons, protons
  c. protons, neutrons
  d. neutrons, protons
  e. electrons, neutrons

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.3 Isotopes
QUESTION ID:   JFND-GO4R-EC3D-GP3W

 

21. If two different isotopes have the same atomic number, it must mean that

  a. they have the same atomic mass.
  b. they have the same mass number.
  c. they have the same number of protons.
  d. they have the same number of electrons.
  e. they have the same number of neutrons.

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.3 Isotopes
QUESTION ID:   JFND-GO4R-EC3D-GPNN

 

22. Which of the following atomic symbols represents an isotope of ?

  a. b. c. d.
  e.            

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.3 Isotopes
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPNB

 

23. Which of the following statements is true concerning and ?

  a. They have the same number of neutrons.
  b. They are isotopes.
  c. They have the same relative atomic mass.
  d. They have the same mass number.
  e. They have different chemical properties.

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.3 Isotopes
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPB3

 

24. The masses of isotopes and their abundances are determined experimentally using

  a. a mass spectrometer.
  b. an analytical balance.
  c. a centrifuge.
  d. filtration followed by distillation.
  e. electrolysis.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.3 Isotopes
QUESTION ID:   JFND-GO4R-EC3D-GPBA

 

25. A sample of an element consists of two isotopes. The percent abundance of one of the isotopes is 43.0%. What is the percent abundance of the other isotope?

  a. 14.5 b. 21.5 c. 28.5 d. 43.0 e. 57.0

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.3 Isotopes
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPNG

 

26. The mass spectrum of an element with two naturally occurring isotopes is shown below. What is the best estimate of the element’s (average) atomic weight?

  a. 10 amu b. 11 amu c. 10.8 amu d. 10.2 amu e. 10.5 amu

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPNF

 

27. Lithium has two naturally occurring isotopes, 6Li and 7Li . The atomic weight of lithium is 6.941. Which of the following statements concerning the relative abundance of each isotope is correct?

  a. The abundance of 7Li is greater than 6Li.
  b. The abundance of 7Li is less than 6Li.
  c. The abundance of 6Li is equal to the abundance of 7Li.
  d. Not enough data is provided to determine the correct answer.
  e. Based on the atomic mass, only 7Li occurs naturally.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPNR

 

28. The element indium has two stable isotopes, indium-113 with an atomic mass of 112.9 u and indium-115 with an atomic mass of 114.9 u. From the atomic weight found on the periodic table, one can conclude that:

  a. both isotopes have the same percent natural abundance
  b. there is an isotope of nitrogen with an atomic mass of 114.8 u
  c. indium-115 has the highest percent natural abundance
  d. indium-113 has the highest percent natural abundance

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.4 Atomic Weight
NOTES:   OWL
QUESTION ID:   JFND-GO4R-EC3D-GPND

 

29. Rubidium has two naturally occurring isotopes. The atomic weight of Rb is 85.4678 u. If 72.15% of Rb is found as Rb-85 (84.9117 u), what is the mass of the other isotope?

  a. 0.56 u b. 85.68 u c. 86.91 u d. 86.02 u e. 83.47 u

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPBU

 

30. An element consists of three isotopes. The abundance of one isotope is 92.21% and its atomic mass is 27.97693 u. The abundance of the second isotope is 4.70% and its atomic mass is 28.97649 u. The atomic mass of the third isotope is 29.97376 u. What is the atomic weight of the element?

  a. 28.09 u b. 28.98 u c. 28.96 u d. 29.87 u e. 29.07 u

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPB1

 

31. Naturally occurring element X exists in three isotopic forms: X-28 (27.979 u, 77.11% abundance), X-29 (28.976 u, 8.00% abundance), and X-30 (29.974 u, 14.89% abundance). Calculate the atomic weight of X.

  a. 29.64 u b. 28.36 u c. 29.04 u d. 29.60 u
  e. 27.38 u            

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.4 Atomic Weight
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPBT

 

32. A certain element consists of two stable isotopes. The first has a mass of 14.0031 amu and a percent natural abundance of 99.63%. The second has a mass of 15.001 amu and a percent natural abundance of 0.37%. What is the atomic weight of the element?

  a. 13.95 u b. 14.00 u c. 14.01 u d. 14.50 u e. 19.50 u

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
NOTES:   Dynamic Question | OWL
QUESTION ID:   JFND-GO4R-EC3D-GPBO

 

33. Copper has an atomic weight of 63.55 u. If 69.17% of Cu exists as Cu-63 (62.93960 u), what is the identity and the atomic mass of the other isotope?

  a. Cu-64; 63.82 u
  b. Cu-64; 64.16 u
  c. Cu-65; 64.16 u
  d. Cu-65; 64.92 u
  e. Cu-66; 65.91 u

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPBZ

 

34. Silver has two stable isotopes with masses of 106.90509 u and 108.9047 u. The atomic weight of silver is 107.868 u. What is the percent abundance of each isotope?

  a. 50.0% Ag-107 and 50.0% Ag-109
  b. 51.8% Ag-107 and 48.2% Ag-109
  c. 55.4% Ag-107 and 44.6% Ag-109
  d. 48.2% Ag-107 and 51.8% Ag-109
  e. 44.6% Ag-107 and 55.4% Ag-109

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.4 Atomic Weight
QUESTION ID:   JFND-GO4R-EC3D-GPBS

 

35. The elements adjacent to the line separating the metals and nonmetals are known as the

  a. metalloids or semimetals.
  b. noble gases.
  c. alkaline earth metals.
  d. transition metals.
  e. alkali metals.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.5 The Periodic Table
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPBI

 

36. Which of the following statements is/are CORRECT?

  1. The group 3A elements are also known as the chalcogens.
  2. The noble gases are sometimes called the rare gases because of their low abundances.
  3. The halogens, or group 7A elements, all exist as diatomic molecules.

 

  a. 1 only b. 2 only c. 3 only d. 2 and 3 e. 1, 2, and 3

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.5 The Periodic Table
QUESTION ID:   JFND-GO4R-EC3D-GPBW

 

37. What element is in the fourth period in Group 3A?

  a. Sb b. Ga c. In d. Si e. Tl

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.5 The Periodic Table
QUESTION ID:   JFND-GO4R-EC3D-GPKN

 

38. What halogen is in the third period?

  a. S b. Cl2 c. I2 d. H2 e. Ar

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.5 The Periodic Table
QUESTION ID:   JFND-GO4R-EC3D-GPKB

 

39. Which of the following statements is not true about the element zinc?

  a. It is a metal.
  b. It is a transition element.
  c. It is in period 4.
  d. It has chemical and physical properties most similar to technitium.
  e. It is in group 2B.

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.5 The Periodic Table
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPJ3

 

40. In which group of the following groups of the periodic table are all the elements nonmetals?

  a. 2A b. 3A c. 5A d. 6A e. 7A

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.5 The Periodic Table
QUESTION ID:   JFND-GO4R-EC3D-GPJA

 

41. Which element belongs to the alkaline earth metals?

  a. magnesium b. potassium c. selenium d. chlorine e. neon

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.5 The Periodic Table
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-GPKG

 

42. What is the name of the halogen in period 4?

  a. iodine b. bromine c. calcium d. argon e. cesium

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.5 The Periodic Table
NOTES:   Dynamic Question | OWL
QUESTION ID:   JFND-GO4R-EC3D-GPKF

 

43. What is the common name of the group that has as one of its members the element which contains 24 protons in its nucleus?

  a. halogens
  b. noble gases
  c. alkali metals
  d. transition metals
  e. alkaline earth metals

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.5 The Periodic Table
NOTES:   Dynamic Question | OWL
QUESTION ID:   JFND-GO4R-EC3D-GPKR

 

44. Which of the following elements is not a metalloid?

  a. boron b. selenium c. germanium d. arsenic e. silicon

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.5 The Periodic Table
QUESTION ID:   JFND-GO4R-EC3D-GPKD

 

45. The formula of acetic acid, CH3CO2H, is an example of a(n)

  a. condensed formula.
  b. empirical formula.
  c. structural formula.
  d. ionic compound formula.
  e. mass spectrum.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.6 Molecules, Compounds, and Formulas
QUESTION ID:   JFND-GO4R-EC3D-GPJU

 

46. C2H2F4 is the formula for two possible molecules. C2H2F4 is an example of a(n)

  a. structural formula.
  b. empirical formula.
  c. condensed formula.
  d. space-filling model.
  e. molecular formula.

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.6 Molecules, Compounds, and Formulas
QUESTION ID:   JFND-GO4R-EC3D-GPJ1

 

47. Which element is most likely to form a 2– ion?

  a. K
  b. Mg
  c. P
  d. Br
  e. S

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJT

 

48. Which atom is most likely to form a 2+ ion?

  a. scandium
  b. calcium
  c. aluminum
  d. oxygen
  e. fluorine

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJO

 

49. Identify the ions present in Na2SO4.

  a. Na+, S2−, and O2−
  b. Na+, S2+, and O2−
  c. Na+ and SO42−
  d. Na+, S2−, and O2+
  e. Na+ and SO4−

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJZ

 

50. Identify the ions in CaHPO4.

  a. Ca2+ and PO43–
  b. Ca2+ and HPO42–
  c. Ca+ and HPO4–
  d. Ca3+ and HPO43–
  e. Ca2+, H+, P3–, and O2–

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJS

 

51. What charge is likely on a monatomic silver cation?

  a. 2–
  b. 1–
  c. 1+
  d. 2+
  e. 3+

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJI

 

52. For a nonmetal in Group 6A of the periodic table, the most common monatomic ion will have a charge of ____.

  a. 3–
  b. 2–
  c. 1–
  d. 1+
  e. 2+

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-GPJW

 

53. Indium(III) monohydrogen phosphate is an ionic compound formed from In3+ and HPO42-. What is the correct way to represent the formula?

  a. InHPO4+ b. In(HPO4)2– c. In3+HPO42- d. In2(HPO4)3
  e. In3(HPO4)5            

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOKN

 

54. Which of the following formulas is not correct?

  a. AlPO4 b. KClO4 c. CaS d. Na(NO3)2 e. Na2HPO4

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOKB

 

55. What is the correct formula for an ionic compound that contains barium ions and carbonate ions?

  a. BaCO3 b. Ba(HCO3)2 c. Ba2CO3 d. Ba2C e. Ba(CO3)2

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJ3

 

56. Sodium sulfate has the chemical formula Na2SO4. Based on this information, the formula for chromium(III) sulfate is ____.

  a. CrSO4 b. Cr(SO4)3 c. Cr2(SO4)3 d. Cr2SO4 e. Cr3(SO4)2

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJA

 

57. What is the charge on the copper ion in K3P?

  a. 3– b. 1– c. 0 d. 1+ e. 3+

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOKG

 

58. What is the correct formula for calcium nitrate?

  a. CaN b. Ca3N2 c. CaNO2 d. Ca3(NO3)2 e. Ca(NO3)2

 

ANSWER:   e
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOKF

 

59. What is the correct formula for potassium dihydrogen phosphate?

  a. KH2PO4 b. K2HPO4 c. K2H2PO4 d. K3H2PO4 e. KH2P

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOKR

 

60. The formula for aluminum fluoride is

  a. AlF3. b. AlF. c. Al2F. d. AlF4. e. AlF2.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOKD

 

61. What is the correct formula for cobalt(III) bromide?

  a. CoBr b. CoBr3 c. Co2Br3 d. Co3Br2 e. Co3Br

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJU

 

62. What is the correct formula for gallium(III) peroxide?

  a. GaO2 b. Ga2O2 c. Ga3(O2)2 d. Ga2(O2)3
  e. Ga(O2)2            

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOJ1

 

63. The correct name for Sr2+ is

  a. monostrontium ion.
  b. strontium ion.
  c. strontium(II) ion.
  d. strontium(I) ion.
  e. strontium.

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOJT

 

64. What is the symbol for an ion of an element which has 56 protons and 54 electrons.

  a. Ba2+ b. Ba2- c. Xe2+ d. Xe2-
  e. Ds2+            

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   Dynamic Question | OWL
QUESTION ID:   JFND-GO4R-EC3D-EOJO

 

65. What is the correct name for NH4NO3?

  a. ammonia hydrogen nitrate
  b. ammonia hydrogen nitride
  c. ammonium nitric acid
  d. ammonium nitrate
  e. ammonium nitride

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJZ

 

66. What is the formula for the compound which forms between the ammonium and bromide ions?

  a. NH3Br b. NH4Br c. NH3Br2 d. NH4Br2 e. (NH4)2Br

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
NOTES:   OWL
QUESTION ID:   JFND-GO4R-EC3D-EOJS

 

67. What is the correct name for SrCl2?

  a. strontium dichloride
  b. strontium dichlorine
  c. strontium(II) dichloride
  d. strontium chloride
  e. iodine strontide

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJI

 

68. What is the correct name for Ca(CH3CO2)2?

  a. calcium(II) carbonate
  b. calcium carbonate
  c. calcium acetate
  d. acetic calcide
  e. calcium carbonide

 

ANSWER:   c
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EOJW

 

69. Which of the following statements concerning ionic compounds is/are correct?

  1. As ion charges increase, the attraction between oppositely charged ions increases.
  2. Although not electrically conductive like metals, ionic compounds are malleable.
  3. Positive and negative ions are attracted to each other by electrostatic forces.

 

  a. 1 only b. 2 only c. 3 only d. 1 and 3 e. 1, 2, and 3

 

ANSWER:   d
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EO1N

 

70. Predict which ionic compound has the highest melting point.

  a. KBr b. MgO c. RbI d. CaBr2 e. CsCl

 

ANSWER:   b
POINTS:   1
HAS VARIABLES:   False
TOPICS:   2.7 Ionic Compounds: Formulas, Names, and Properties
QUESTION ID:   JFND-GO4R-EC3D-EO1B

 

71. What is the correct name for SCl2?

  a. sulfur dichloride.
  b. monosulfur chloride.
  c. sulfide dichloride.
  d. sulfur dichlorine.
  e. monosulfur dichlorine.

 

ANSWER:   a
POINTS:   1
HAS VARIABLES:   True
TOPICS:   2.8 Molecular Compounds: Formulas and Names
NOTES:   Dynamic Question
QUESTION ID:   JFND-GO4R-EC3D-EOT3
Chapter_04_Stoichiometry_Quantitative_Information_about_Chemical_Reactions

 

 

1. Potassium hydrogen carbonate decomposes with heat as follows:

2KHCO3(s)  →  K2CO3(s) + CO2(g) + H2O(l)

How many moles of potassium carbonate will be produced if 311 g of potassium hydrogen carbonate are heated?

  a. 1.55 mol b. 2.25 mol c. 10.9 mol d. 156 mol
  e. 3.11 mol            

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multi-Mode (Multiple choice)
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   8/4/2014 7:19 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJU

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJZ-GOHU-RPJ3-8Y3D-RQDG-CASU-R3TO-CESU-NPTI-GOSS-NQMN-GCSU-K3TU-CR4G-KAJA-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

2. Calculate the number of moles of O2 required to react with phosphorus to produce 2.82 g of P4O6. (Molar mass P4O6 = 219.9 g/mol)

  a. 0.0128 mol b. 0.088 mol c. 0.0385 mol d. 0.0256 mol e. 0.077 mol

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multi-Mode (Multiple choice)
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJ1

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJO-CO4D-KATA-8B1U-N3DR-CESU-OPDD-CRSS-CCMN-GOSU-OP3O-CESU-NCUG-GA4S-EAJA-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

3. The complete combustion of 0.26 moles of propane, C3H8, will

  a. consume 0.26 mol O2 and produce 0.26 mol CO2.
  b. consume 0.26 mol O2 and produce 0.52 mol CO2.
  c. consume 1.3 mol O2 and produce 0.78 mol CO2.
  d. consume 1.3 mol O2 and produce 3.9 mol CO2.
  e. consume 1.3 mol O2 and produce 1.0 mol CO2.

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJT

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJ1-GBUD-K3TO-GRAU-13TU-GESU-G3JO-CESU-CPJ3-GOSS-CC3S-CRSU-OCTW-CW3U-K3UN-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

4. 2Al(s) + 6HCl(aq)  →  2AlCl3(aq) + 3H2(g)

According to the equation above, how many grams of aluminum are needed to completely react with 2.19 mol of hydrochloric acid?

  a. 177 g b. 26.6 g c. 19.7 g d. 2.19 g e. 59.1 g

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJO

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJ1-GW5D-EA33-GOAD-1CTU-GRSU-OPTS-8YSS-GCT3-GOSU-CP3Z-8RSS-NP5G-8BTG-RQBI-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

5. Sulfur dioxide will react with water to form sulfurous acid (see balanced equation below).

SO2(g)  + H2O(l)  →  H2SO3(l)

What mass of sulfur dioxide is needed to prepare 27.86 g of H2SO3(l)?

  a. 21.74 g b. 35.69 g c. 0.4348 g d. 0.3394 g e. 27.86 g

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multi-Mode (Multiple choice)
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJZ

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMF-CW4U-C3BO-GPTU-1CBU-GYSU-YCT3-8YSU-KQJW-GOSU-EQMB-GESU-OA3U-GHHD-RC33-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

6. When strongly heated, boric acid breaks down to boric oxide and water. What mass of boric oxide is formed from the decomposition of 15.0 g B(OH)3?
2 B(OH)3(s) → B2O3(s) + 3 H2O(g)

  a. 7.50 g b. 15.0 g c. 8.44 g d. 16.9 g e. 33.8 g

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJS

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMN-CR3S-GCUG-GF1G-GQBA-GWSS-NA3O-CRSU-RAJI-GOSS-CPB1-GOSU-OQMR-CR4G-EAJO-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

7. If the complete combustion of an unknown mass of ethylene produces 16.0 g CO2, what mass of ethylene is combusted?
C2H4(g) + 3 O2(g) → 2 CO2(g) + 2 H2O(g)

  a. 0.182 g b. 0.364 g c. 5.10 g d. 8.00 g e. 12.6 g

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJI

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMF-GC4U-RCJU-GBTS-EQJO-GOSU-K3JO-8YSU-CPT3-GOSU-YQDN-COSS-G3TO-8FOU-OAJT-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

8. Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows:

Cu2S(s) + O2(g)  →  2Cu(s) + SO2(g)

What mass of copper(I) sulfide is required in order to prepare 0.580 kg of copper metal?

  a. 0.58 kg b. 0.29 kg c. 0.436 kg d. 1.45 kg e. 0.726 kg

 

ANSWER:   e
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTJW

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-GO3D-QATW-GO3D-EPJ3-CRSU-QCBA-CESU-ECT1-GOSU-EQDG-CCSU-NPUG-GYAD-YPT3-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

9. The compound P4S3 is used in matches. It reacts with oxygen to produce P4O10 and SO2. The unbalanced chemical equation is shown below.
P4S3(s) + O2(g) → P4O10(s) + SO2(g)
What mass of SO2 is produced from the combustion of 0.401 g P4S3?

  a. 0.134 g b. 1.20 g c. 0.0389 g d. 0.117 g e. 0.350 g

 

ANSWER:   e
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1N

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMF-GW3G-RPMN-GF1U-NC3I-CESU-CQJU-8YSU-CP3U-GOSS-RAMR-CESU-GPTO-CJUD-G3DN-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

10. How many grams of dioxygen are required to completely burn 3.4 g of C2H5OH?

  a. 8.2 g b. 11 g c. 2.3 g d. 38 g e. 51 g

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1B

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMF-CTTS-CPUB-GY4U-CATS-GOSU-EC5R-CRSU-N3TS-GOSU-CCUR-CRSS-KPJ1-GJ1D-YAMB-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

11. Hydrogen peroxide decomposes into oxygen and water. What mass of oxygen is formed from the decomposition of 125 g of H2O2?

  a. 58.8 g b. 66.4 g c. 107 g d. 118 g e. 125 g

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTT3

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMB-GP1S-RPJ3-GI1S-GCB1-GESU-GC31-8YSU-GCJW-GOSU-CQDD-CCSS-EQDB-GJ1D-OAJI-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

12. One step in the isolation of pure rhodium metal (Rh) is the precipitation of rhodium(III) hydroxide from a solution containing rhodium(III) sulfate according to the following balanced chemical equation:

Rh2(SO4)3(aq) + 6NaOH(aq)  →  2Rh(OH)3(s) + 3Na2SO4(aq)

If 8.40 g of rhodium(III) sulfate reacts with excess sodium hydroxide, what mass of rhodium(III) hydroxide may be produced?

  a. 5.23 g b. 16.8 g c. 8.4 g d. 1.3 g e. 10.4 g

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.1 Mass Relationships in Chemical Reactions: Stoichiometry
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTA

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMR-GTOU-1C33-GAHD-CPUB-CRSU-EPTA-8RSS-K3JZ-GOSU-OCDR-CRSS-NPUF-GAAD-GPMR-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

13. The commercial production of phosphoric acid, H3PO4, can be represented by the equation

1500 g 300 g 304 g 1150 g 300 g  
Ca3(PO4)2 + 3SiO2 + 5C + 5O2 + 3H2O → 3CaSiO3 + 5CO2 + 2H3PO4
310 g/mol 60.1 g/mol 12.0 g/mol 32.0 g/mol 18.0 g/mol  

The molar mass for each reactant is shown below the reactant, and the mass of each reactant for this problem is given above. Which substance is the limiting reactant?

  a. H2O b. C c. O2 d. Ca3(PO4)2
  e. SiO2            

 

ANSWER:   e
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   8/4/2014 7:21 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1G

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMN-G7OS-NC5N-C31G-KP3T-CASS-KCJW-CESU-EC3A-GOSU-13UG-CRSU-KC3T-CP1G-R3DG-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

14. How many moles of sodium bromide can be produced from the reaction of 1.03 moles of sodium with 0.650 moles of bromine gas?
2 Na(s) + Br2(g) → 2 NaBr(s)

  a. 0.650 mol b. 1.03 mol c. 1.30 mol d. 2.06 mol e. 0.515 mol

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1F

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-GPUG-GCJW-GTTG-KC3I-GYSU-QA5N-8YSU-YC3T-GOSS-GPT3-8YSS-KAJU-GJOU-CQJU-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

15. How many moles of Mg3P2(s) can be produced from the reaction of 0.14 mol Mg(s) with 0.020 mol P4(s)?
6 Mg(s) + P4(s) → 2 Mg3P2(s)

  a. 0.047 mol b. 0.14 mol c. 0.42 mol d. 0.020 mol e. 0.040 mol

 

ANSWER:   e
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1R

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJZ-GI1U-CP3I-CTTU-OAMD-8RSU-QPTU-CESS-CC5D-GOSU-EPDF-CASU-NA3I-8FTD-KATO-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

16. Nitric oxide is made from the oxidation of ammonia. What mass of nitric oxide can be made from the reaction of 8.00 g NH3 with 17.0 g O2?
4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

  a. 4.54 g b. 12.8 g c. 14.1 g d. 15.9 g e. 25.0 g

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CT1D

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJT-GY5U-GP3U-GEHD-N3JZ-CRSS-KC3O-CESU-1AJO-GOSS-KPJO-CCSU-NQBO-GEHD-GAUB-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

17. If 5.00 g Br2 and 1.10 g NH3 react according to the equation below, what is the maximum mass of ammonium bromide produced?
3 Br2() + 8 NH3(g) → 6 NH4Br(s) + N2(g)

  a. 3.06 g b. 6.13 g c. 12.9 g d. 4.74 g e. 8.43 g

 

ANSWER:   d
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTU

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJA-CJUG-NC3U-8Y4D-QCJA-GESU-G3JW-CRSU-CAUR-GOSU-CPTS-GHSU-K3UD-GJ1U-OQJ1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

18. What mass of iron can be produced from the reaction of 175 kg Fe2O3 with 385 kg CO?
Fe2O3(s) + 3 CO(g) → 2 Fe(s) + 3 CO2(g)

  a. 2.19 kg b. 30.6 kg c. 61.2 kg d. 122 kg e. 512 kg

 

ANSWER:   d
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTT1

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJ1-GF1D-G3UD-CEAD-ECJ3-8RSU-KCBS-8YSU-O3JO-GOSU-Q3UG-GRSS-RCBS-G7TU-CCUR-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

19. Magnesium reacts with iodine gas at high temperatures to form magnesium iodide. What mass of MgI2 can be produced from the reaction of 5.15 g Mg and 50.0 g I2?

  a. 29.5 g b. 44.9 g c. 54.8 g d. 55.2 g e. 58.9 g

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTT

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-G7OU-QP5B-CJ1S-EPTA-COSS-RPBO-CESS-RPBI-GOSU-YPUB-GHSS-N3UN-GJ1U-O3JS-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

20. If 50.6 g of O2 is mixed with 50.6 g of H2 and the mixture is ignited, what is the maximum mass of water that may be produced?

  a. 455 g b. 56.9 g c. 50.6 g d. 101 g e. 90.0 g

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTO

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJW-GI1S-KCDB-CE3D-QP3T-8RSS-CAMB-8YSU-NPJI-GOSU-CCBA-GASU-YCDN-C3OU-OCB1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

21. Aspirin (C9H8O4) is produced by the reaction of salicylic acid (M = 138.1 g/mol) and acetic anhydride (M = 102.1 g/mol).
C7H6O3(s) + C4H6O3() → C9H8O4(s) + C2H4O2()
If you react 2.00 g C7H6O3 with 1.60 g C4H6O3, what mass of aspirin (M = 180.2 g/mol) can theoretically be obtained?

  a. 0.40 g b. 2.61 g c. 2.82 g d. 1.53 g e. 3.60 g

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.2 Reactions in which One Reactant is Present in Limited Supply
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTZ

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-CIUD-1P5N-GOHG-KC5G-8YSU-KCJ1-8YSS-CC31-GOSU-R3TS-CRSS-NQDF-8R4D-GQJO-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

22. A 5.95-g sample of AgNO3 is reacted with excess BaCl2 according to the equation

2AgNO3(aq) + BaCl2(aq) → 2AgCl(s) + Ba(NO3)2(aq)

to give 4.48 g of AgCl. What is the percent yield of AgCl?

  a. 59.5 % b. 44.6 % c. 89.2 % d. 75.3 % e. 100 %

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTS

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMR-GFTU-KATW-CWHU-GQMG-CCSU-YCTW-CRSS-RPTO-GOSU-GQMR-GCSS-R3T1-GWHU-RP3T-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

23. The reaction of 11.9 g of CHCl3 with excess chlorine produced 10.0 g of CCl4, carbon tetrachloride:

2CHCl3 + 2Cl2 → 2CCl4 + 2HCl

What is the percent yield?

  a. 84.0 % b. 100 % c. 65.2 % d. 32.6 % e. 43.5 %

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTI

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJI-8BOU-EPBZ-GOAG-CPT3-COSU-NAJW-8YSU-E3DB-GOSU-YPDG-GESS-KA5R-GCHS-NQB1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

24. Pure copper may be produced by the reaction of copper(I) sulfide with oxygen gas as follows:

Cu2S(s) + O2(g)  →  2Cu(s) + SO2(g)

If the reaction of 0.700 kg of copper(I) sulfide with excess oxygen produces 0.190 kg of copper metal, what is the percent yield?

  a. 67.9 % b. 39.9 % c. 27.1 % d. 135 % e. 33.9 %

 

ANSWER:   e
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CTTW

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJA-CPUG-GAT1-C3OS-NAUF-8RSU-1PTU-8RSU-CPBA-GOSU-N3B3-CRSS-GAMF-8YAS-RAJU-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

25. Sulfur trioxide, SO3, is made from the oxidation of SO2as follows: 2SO2 + O2  →  2SO3
A 21-g sample of SO2 gives 18 g of SO3. The percent yield of SO3 is .

  a. 11 % b. 69 % c. 17 % d. 26 % e. 100 %

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4N

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMN-GP1U-OCMR-CO5S-KATA-CASU-K3TO-8YSU-QQDG-GOSS-EC5N-GHSS-CAUN-8FTU-ECDD-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

26. Nitric oxide, NO, is made from the oxidation of NH3 as follows: 4NH3 + 5O2 → 4NO + 6H2O
If 9.6-g of NH3 gives 12.0 g of NO, what is the percent yield of NO?

  a. 93 % b. 44 % c. 11 % d. 71 % e. 28 %

 

ANSWER:   d
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4B

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJ1-GH4U-EATS-CCAD-CPBO-8YSS-NPJ1-CRSS-R3MD-GOSS-KP5R-GASS-NC3W-GO4D-OPTA-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

27. Consider the fermentation reaction of glucose:

C6H12O6 → 2C2H5OH + 2CO2

A 1.00-mol sample of C6H12O6 was placed in a vat with 100 g of yeast. If 37.0 g of C2H5OH was obtained, what was the percent yield of C2H5OH?

  a. 40.2 %
  b. 20.1 %
  c. 37.0 %
  d. 100 %
  e. none of these

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.3 Percent Yield
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO33

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJA-GBOU-CA3U-CT1U-1AJI-8RSU-YPB1-CRSS-EAJW-GOSU-EP5B-CWSU-QCBZ-G3TU-YC5N-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

28. Aspirin is produced by the reaction of salicylic acid (M = 138.1 g/mol) and acetic anhydride (M = 102.1 g/mol).
C7H6O3(s) + C4H6O3() → C9H8O4(s) + C2H4O2()
If 2.04 g of C9H8O4 (M = 180.2 g/mol) is produced from the reaction of 3.03 g C7H6O3 and 4.01 g C4H6O3, what is the percent yield?

  a. 28.8% b. 29.0% c. 50.9% d. 51.6% e. 67.3%

 

ANSWER:   d
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.3 Percent Yield
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3A

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-GBTD-OPUR-CA3U-CQJW-GRSU-NPJZ-CRSU-GPTA-GOSU-OC3T-CWSS-KPBW-GEHD-N3JZ-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

29. Under certain conditions the reaction of ammonia with excess oxygen will produce a 29.5% yield of NO. What mass of NH3 must react with excess oxygen to yield 157 g NO?
4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

  a. 89.1 g b. 302 g c. 263 g d. 26.3 g e. 938 g

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.3 Percent Yield
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4G

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJW-GI1D-1CBS-CW5G-CATZ-COSU-YPTW-8YSU-G3MF-GOSU-QCDR-CASU-YPDN-CJ1G-C3MN-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

30. If 15.0 g N2 and 2.00 g H2 react to produce 1.38 g NH3, what is the percent yield of the reaction?
N2(g) + 3 H2(g) → 2 NH3(g)

  a. 7.57% b. 12.2% c. 8.12% d. 15.1% e. 8.17%

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.3 Percent Yield
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4F

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMD-CPTS-G3J1-8F1G-NA5R-CRSS-GATW-8YSS-KAJS-GOSU-C3JT-GHSU-13BZ-CA4U-OPBS-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

31. Sulfur hexafluoride is produced by reacting elemental sulfur with fluorine gas.
S8(s) + 24 F2(g) → 8 SF6(g)
What is the percent yield if 18.3 g SF6 is isolated from the reaction of 10.0 g S8 and 30.0 g F2?

  a. 40.2% b. 45.8% c. 47.6% d. 54.6% e. 61.0%

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.3 Percent Yield
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4R

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJU-CO3G-GPTS-CA4U-O3JZ-GOSU-R3TO-CESU-E3B1-GOSU-EQJO-8RSS-KATI-GIOS-GPMB-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

32. Of the following, the only empirical formula is

  a. C6H12. b. C4H8. c. C3H8. d. H2O2. e. O2.

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO4D

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMB-GBTU-KPJZ-CJUD-1QBS-8RSU-RC3U-8RSS-GQMG-GOSU-R3MR-CASS-CPTZ-CJTG-NQMR-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

33. A certain compound has a molar mass of 270 g/mol. Which is a possible empirical formula for this compound?

  a. CH2O b. CHO c. C2H2O2 d. C2HO e. C2H2O

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3U

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJ1-CT1U-OPTS-GY5D-OCBI-8RSU-OC3Z-CRSS-NQJU-GOSU-NA3A-COSU-CATW-CA3U-C3T1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

34. The empirical formula of butadiene is C2H3. An experimental determination of the molar mass of butadiene yields the value of 54 g/mol. What is the molecular formula of butadiene?

  a. C5H10 b. C22 c. C4H6 d. C3H8
  e. C6H9            

 

ANSWER:   c
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   7/30/2014 1:22 PM
QUESTION ID:   JFND-GO4R-EC3D-CO31

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJA-GP1S-RCDB-CR4D-QCJW-COSS-GQBZ-CRSS-EA3U-GOSS-KQMG-GRSS-CA3W-GWHG-KPBS-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

35. A compound consists of only C and F. It contains 17.39% C by mass. What is the empirical formula of the compound?

  a. CF b. CF2 c. CF3 d. C2F e. CF4

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3T

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJS-GP1U-NCJI-GR3U-YCDD-GRSS-KPUR-8RSS-KA3A-GOSU-Q3TT-GRSU-KC5B-CC4S-EQJT-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

36. The amount of calcium in a 15.0-g sample was determined by converting the calcium to calcium oxalate, CaC2O4. The CaC2O4 weighed 11.0 g. What is the percent of calcium in the original sample?

  a. 9.4 % b. 22.9 % c. 12.9 % d. 29.4 % e. 73.3 %

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3O

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMF-GJ1U-ECUR-GHAG-NCT1-GHSS-EC3I-CRSU-YPB1-GOSS-EATZ-GOSS-RPDR-CT1S-RPB1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

37. A mass of 3.462 g of a metal carbonate, MCO3, is heated to drive off carbon dioxide. The remaining metal oxide has a mass of 2.229 g.
MCO3(s) → MO(s) + CO2(g)
What is the identity of the metal?

  a. Mg b. Ca c. Cu d. Sr e. Ba

 

ANSWER:   a
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   True
TOPICS:   4.4 Chemical Equations and Chemical Analysis
NOTES:   Dynamic Question
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3Z

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMMG-GY5S-RQMD-CAAG-GCJO-CWSS-NPUG-CESS-RC3A-GOSU-1A5G-CWSS-KP5F-CWAG-GAJ1-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

38. A mixture of MnSO4 and MnSO4⋅4H2O has a mass of 2.005 g. After heating to drive off all the water the mass is 1.780 g. What is the mass percent of MnSO4⋅4H2O in the mixture?

  a. 11.2% b. 34.7% c. 65.3% d. 69.6% e. 88.8%

 

ANSWER:   b
POINTS:   1
QUESTION TYPE:   Multiple Choice
HAS VARIABLES:   False
TOPICS:   4.4 Chemical Equations and Chemical Analysis
DATE CREATED:   3/5/2014 6:37 PM
DATE MODIFIED:   3/5/2014 6:37 PM
QUESTION ID:   JFND-GO4R-EC3D-CO3S

 

QUESTION GLOBAL ID:   GCID-E7BW-1TBP-GR5D-1C3U-GTOU-OQBI-GTUN-4CUR-CJTN-4QDR-8R4N-4P3Z-CA41-4AMG-CCAG-GP5G-GJDI-GWN8-EPRW-EMJZ-8FOS-RQBA-CTOS-RPMR-CASU-OAT3-CRSU-EPMN-GOSU-OA33-8RSU-O3BW-GH5D-GPJZ-E7JI-YT4D-JFNN-4OTI-GO4W-NQNBEE

 

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