Chemistry The Molecular Science 5th Edition by John W. Moore – Test Bank

Chemistry The Molecular Science 5th Edition

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Sample Test Chapter_3_Chemical_Reactions

1. Which of the following cannot be determined from a balanced chemical equation? a.

The number of molecules of reactants and products.

b.

The number of atoms of each element reacting.

c.

The number of moles of reactants and products.

d.

The relative mass of each reactant and product.

e.

Whether the reaction will proceed as written.

ANSWER:

e

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Comprehension

2. In the reaction given below, if 12 moles of aluminum oxide are consumed, how many moles of oxygen gas are produced?

2 Al2O3 4 Al + 3 O2 a.

4

b.

18

c.

3

d.

6

e.

12

ANSWER:

b

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Application

3. In the reaction given below, for every two molecules of aluminum oxide consumed, how many molecules of oxygen are produced?

2 Al2O3 4 Al + 3 O2 a. b.

c. d. e.

ANSWER:

a

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Application

4. In the reaction shown below, which substances are dissolved in water?

Cu(s) + H2SO4(aq) CuSO4(aq) + H2(g) a.

Cu

b.

H2SO4 and CuSO4

c.

H2 and Cu

d.

H2 and H2SO4

e.

Cu and CuSO4

ANSWER:

b

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Knowledge

5. For the reaction given below, how many moles of aluminum will react if 12 moles of Br2 react and 8 moles of AlBr3 are produced?

2 Al + 3 Br2 2 AlBr3 a.

4

b.

16

c.

12

d.

40

e.

8

ANSWER:

e

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Application

6. What interpretation is most accurate for the reaction?

2 H2O(l) 2 H2(g) + O2(g) a.

Two molecules of water will produce three molecules of a gas mixture.

b.

The gas mixture produced will include fewer oxygen atoms than you started with.

c.

The H2 in H2O indicates that the hydrogen molecules were present at the begining of the reaction.

d.

The chemical equation must be incorrect since there is a 2 in front of the H 2O.

e.

The chemical equation must be incorrect since you end up with more molecules than you start with.

ANSWER:

a

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Analysis

NOTES:

recognition of hidden meanings

7. Which equation is best represented by the drawing? a.

Al + Cl2 → AlCl3

b.

2 Al + 3 Cl2 → 2 AlCl3

c.

Al + Cl →AlCl3

d.

2 Al + Cl6 → Al2Cl6

e.

Al +3 Cl2 → 2 Al6Cl

ANSWER:

b

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Analysis

NOTES:

Generalize from given facts

8. What interpretation of the reaction is most accurate for the reaction?

CaCO3(s) CaO(s) + CO2(g) a.

The chemical equation must be incorrect because you produce more compounds than you had at the beginni

b.

Oxygen gas is produced as the reaction proceeds.

c.

The number of oxygen atoms increases as the reaction proceeds.

d.

The solid reactant produces a pure product.

e.

The solid reactant yields a mixture that contains a new solid and a gas.

ANSWER:

e

POINTS:

1

TOPICS:

3.1 Chemical Equations

OTHER:

Analysis

NOTES:

recognition of hidden meanings

9. Potassium metal and chlorine gas react in a combination reaction to produce an ionic compound. What is the correct balanced equation for this reaction? a.

2 K(s) + Cl2(g) → 2 KCl(s)

b.

K(s) + Cl2(g) → KCl2(s)

c.

K2(s) + Cl2(g) → 2 KCl(s)

d.

K(s) + Cl(g) → KCl(s)

e.

K(s) + Cl2(g) → KCl(s)

ANSWER:

a

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

10. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I CH3OH + II O2 III CO2 + IV H2O I II III IV a.

2522

b.

1212

c.

4648

d.

1312

e.

2324

ANSWER:

e

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowldege

11. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I KO2 + II H2O III KOH + IV O2 I II III IV a.

2243

b.

1111

c.

4243

d.

8486

e.

2121

ANSWER:

c

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

12. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I NH3 + II O2 III NO + IV H2O I II III IV a.

2223

b.

4546

c.

4446

d.

8 10 8 12

e.

2523

ANSWER:

b

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

13. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I Ni(ClO4)2 + II K2S III KClO4 + IV NiS I II III IV a.

2112

b.

1221

c.

1112

d.

1121

e.

1211

ANSWER:

d

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

14. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I BaCl2 + II AgNO3 III Ba(NO3)2 + IV AgCl I II III IV a.

1212

b.

2111

c.

1112

d.

1122

e.

1221

ANSWER:

a

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

15. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I CO + II NO III CO2 + IV N2

I II III IV a.

2221

b.

1221

c.

2223

d.

2121

e.

1112

ANSWER:

a

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

16. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I Fe3O4 + II H2 III Fe + IV H2O I II III IV a.

2868

b.

1132

c.

2464

d.

1434

e.

1232

ANSWER:

d

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

17. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I Al + II H2SO4 III Al2(SO4)3 + IV H2 I II III IV a.

2323

b.

4616

c.

3113

d.

2313

e.

3132

ANSWER:

d

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

18. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I K2S + II AlCl3 III KCl + IV Al2S3 I II III IV a.

3261

b.

1121

c.

3232

d.

3262

e.

2323

ANSWER:

a

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

19. The Roman numerals in the reaction given represent the coefficients in the balanced chemical equation. What are the values of the coefficients?

I Na3PO4 + II Mg(NO3)2 III Mg3(PO4)2 + IV NaNO3 I II III IV a.

3239

b.

2233

c.

2316

d.

3223

e.

2116

ANSWER:

c

POINTS:

1

TOPICS:

3.2 Balancing Chemical Equations

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

20. What ions are present in an aqueous solution of lithium perchlorate, LiClO4(aq)? a.

Li+ and Cl–

b.

Li+, Cl+, and O42-

c.

Li+ and ClO4–

d.

Li– and Cl+

e.

Li+, Cl–, and O2-

ANSWER:

c

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Analysis

NOTES:

Seeing Patterns

21. Which compound will dissolve in water in large amounts? a.

BaSO4

b.

Na2SO4

c.

AgCl

d.

Al(OH)3

e.

MgS

ANSWER:

b

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Knowledge

NOTES:

Observation and recall information

22. Which compounds will not dissolve in water in large amounts at 20°C? Ca(NO3)2

MgCO3

PbI2

I.

II.

III.

a.

II & III

b.

III & IV

c.

III & IV

d.

I & II

e.

I & IV

ANSWER:

a

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Knowledge

NOTES:

Observation and recall of information

23. A solution containing an unknown cation was added to three solutions and the following observations were recorded: SOLUTION

OBSERVATION

NaI

no precipitate

Na2SO4

precipitate

NaOH

no precipitate

The unknown cation is a.

K+

b.

Pb2+

c.

Sr2+

d.

Ca2+

e.

Ag+

ANSWER:

d

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Analysis

NOTES:

Seeing patterns

24. Which statement about the reaction below is true, given large amounts of reactants?

NaCl + AgNO3 NaNO3 + AgCl a.

NaNO3 is insoluble in water and will precipitate.

b.

AgCl is insoluble in water and will precipitate.

c.

Both NaNO3 and AgCl are insoluble in water and will precipitate.

d.

All compounds in the reaction are soluble in water and no reaction occurs.

e.

AgNO3 is insoluble in water and no reaction will occur.

ANSWER:

b

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Comprehension

NOTES:

translate knowledge into new context

25. Which statement about the reaction below is true, given large amounts of reactants?

Ba(NO3)2 + K2CO3 BaCO3 + 2KNO3 a.

K2CO3 is insoluble in water and will precipitate.

b.

All compounds in the reaction are soluble in water and no reaction occurs.

c.

Ba(NO3)2 is insoluble in water and will precipitate.

d.

BaCO3 is insoluble in water and will precipitate.

e.

Both BaCO3 and KNO3 are insoluble in water and will precipitate.

ANSWER:

d

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Comprehension

NOTES:

translate knoweldge into new context

26. Write a balanced chemical equation for the exchange reaction that occurs when KOH(aq) is added to FeCl3(aq). a.

KOH(aq) + FeCl3(aq) → FeOH(aq) + KCl(s)

b.

KOH(aq) + FeCl3(aq) → FeOH(s) + KCl(aq)

c.

3 KOH(aq) + FeCl3(aq) → Fe(OH)3(s) + 3 KCl(aq)

d.

3 KOH(aq) + FeCl3(aq) → K3Fe(s) + 3 HClO(aq)

e.

No reaction occurs.

ANSWER:

c

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Comprehension

NOTES:

Predict consequences

27. What is the net ionic equation for the reaction of Ca(NO3)2 and Na2SO4? a.

2Ca+ + SO42− Ca2SO4

b.

Na2+ + 2NO3− Na(NO3)2

c.

Ca+ + SO4− CaSO4

d.

Ca2+ + SO42− CaSO4

e.

Na+ + NO3− NaNO3

ANSWER:

d

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Comprehension

NOTES:

Predict consequences

28. What is the net ionic equation for the reaction of AlCl3 and NaOH? a.

Al3+ + OH3− AlOH

b.

Na3+ + 3Cl− NaCl3

c.

Al3+ + 3OH− Al(OH)3

d.

Na+ + Cl− NaCl

e.

Al+ + OH− AlOH

ANSWER:

c

POINTS:

1

TOPICS:

3.3 Precipitation Reactions

OTHER:

Comprehension

NOTES:

Predict consequences

29. Which of the following is/are properties of acids?

I.

Acids increase the hydrogen ion concentration in water.

II.

Acids react with many metals to produce precipitates.

III.

Acids are responsible for the bitter taste of some foods and beverages.

a.

I only

b.

II only

c.

III only

d.

I and II

e.

I, II, and III

ANSWER:

a

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Knowledge

NOTES:

Knowledge of major ideas

30. What is the correct formula for the hydronium ion? a.

NH4+

b.

H+

c.

H3O+

d.

OH−

e.

H−

ANSWER:

c

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Knowledge

NOTES:

observation and recall of information

31. What is the correct formula for the hydroxide ion? a.

H−

b.

OH−

c.

H3O+

d.

NH4+

e.

H+

ANSWER:

b

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Knowledge

NOTES:

Observation and recall of information

32. Which statement about strong acids is true? a.

Strong acids are weak electrolytes.

b.

Citric acid is a strong acid.

c.

Strong acids react only with strong bases.

d.

Strong acids are very concentrated.

e.

Strong acids are mostly converted to ions when dissolved in water.

ANSWER:

e

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Comprehension

NOTES:

Interpret facts, compare, contrast

33. Which statement about bases is true? a.

Bases react with many metals to produce a flammable gas.

b.

Bases turn phenolphthlalein colorless.

c.

Bases increase the hydroxide ion concentration of water when dissolved in it.

d.

Bases react with limestone to produce gas bubbles.

e.

Bases increase the hydronium ion concentration of water when dissolved in it.

ANSWER:

c

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Comprehension

NOTES:

Interpret facts, compare, contrast

34. All of the following are strong electrolytes except:

a.

H2SO4.

b.

HBr.

c.

HNO3.

d.

NaOH.

e.

CH3COOH.

ANSWER:

e

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Knowledge

NOTES:

Observation and recall of information

35. Write a balanced, net­ionic equation for the reaction of aqueous solutions of hydrochloric acid (HCl) and sodium carbonate (Na2CO3). a.

H+(aq) + NaCO3–(aq) → NaHCO3(s)

b.

2 H+(aq) + CO32-(aq) → H2CO3(aq)

c.

2 HCl(aq) + Na2CO3(aq) → H2CO3(aq) + 2 NaCl(aq)

d.

Cl–(aq) + Na+(aq) → NaCl(aq)

e.

2 H+(aq) + CO32-(aq) → H2O(l) + CO2(g)

ANSWER:

e

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Comprehension

NOTES:

Predict consequences

36. Which statement about neutralization reactions is true? a.

The net ionic equation for a neutralization reaction shows the formation of water.

b.

A weak acid cannot neutralize a strong base.

c.

Organic acids neutralize bases by forming hydrogen gas.

d.

The net ionic equation for a neutralization reaction shows the formation of soluble salts.

e.

The net ionic equation for a neutralization reaction shows the formation of hydrogen gas

ANSWER:

a

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Comprehension

NOTES:

Grasp meaning

37. Write a balanced chemical equation for the reaction of aqueous ammonia with aqueous sulfuric acid. a.

2 NH3(aq) + H2SO4(aq) → N2S(g) + 4 H2O(l)

b.

2 NH3(aq) + H2SO4(aq) → 2 NH4+(aq) + SO42-(aq)

c.

NH3(aq) + H2SO4(aq) → NH5+(aq) + SO42-(aq)

d.

2 NH3(aq) + H2SO4(aq) → SO2(g) + 2 NH2S(aq) + 2 H2O(l)

e.

2 NH3(aq) + H2SO4(aq) → 2 (NH4)2SO4(aq) + 2 H2O(l)

ANSWER:

b

POINTS:

1

TOPICS:

3.4 Acid-Base Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

38. What is the reducing agent in the reaction below?

Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s) a.

Cu2+

b.

Zn

c.

Zn2+

d.

SO42−

e.

CuSO4

ANSWER:

b

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Identification of components

39. Which one or two substances are reduced in the reaction below?

2 Al + 3 Cl2 2 AlCl3 a.

Cl2

b.

Al and Cl2

c.

Al and AlCl3

d.

Al

e.

Cl2 and AlCl3

ANSWER:

a

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Identifcation of components

40. Which of the following is a reducing agent? a.

Br2

b.

Na

c.

F2

d.

O2

e.

I2

ANSWER:

b

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Comprehension

NOTES:

Translate knowledge into new context

41. Which of the following represents oxidation? a.

F2 + 2e− 2 F−

b.

Ni2+ + 2e− Ni

c.

2H+ + 2e− H2

d.

Na Na+ + e−

e.

Mg2+ + 2e− Mg

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Comprehension

NOTES:

Translate knowledge into new context

42. Which of the following represents reduction? a.

Al Al3+ + 3e−

b.

Na Na+ + e−

c.

Fe Fe2+ + 2e−

d.

H2 2H+ + 2e−

e.

O2 + 4e− 2 O2−

ANSWER:

e

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Comprehension

NOTES:

Translate knowledge into new context

43. Which substance is oxidized in the reaction below?

NaNO3 + Pb NaNO2 + PbO a.

Na+

b.

NaNO2

c.

NaNO3

d.

PbO

e.

none of these choices

ANSWER:

e

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Seeing patterns

44. Which substance is reduced in the reaction below?

Na2SO4 + 4 C Na2S + 4CO a.

CO

b.

Na2S

c.

S

d.

Na2SO4

e.

none of these choices

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Seeing patterns

45. What is the oxidation number of O in Fe2O3? a.

+2

b.

−3

c.

−2

d.

−5

e.

+5

ANSWER:

c

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Application

NOTES:

Use methods, concepts, theories in new situations

46. What is the oxidation number of O in H2O2? a.

0

b.

+1

c.

−2

d.

−1

e.

+2

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Application

NOTES:

Use methods, concepts, theories in new situations

47. In which of the following compounds does the sulfur atom have the highest (i.e., most positive) oxidation number? a.

Na2SO4

b.

H2S

c.

SO2

d.

H2SO3

e.

S8

ANSWER:

a

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Application

NOTES:

Use methods, concepts, theories in new situdations

48. What is the oxidation number of P in PO43−? a.

−5

b.

+3

c.

−3

d.

+5

e.

−2

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Application

NOTES:

Use methods, concepts, theories in new situations

49. What is the oxidation number of N in NH4+? a.

+1

b.

−1

c.

+3

d.

0

e.

−3

ANSWER:

e

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Application

NOTES:

Use methods, concepts, theories in new situdations

50. What is oxidized in the reaction below?

I2O5 + CO I2 + CO2 a.

CO and CO2

b.

CO2

c.

I2O5

d.

CO

e.

I2

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Seeing patterns

51. What is reduced in the reaction below?

CH4 + O2 CO2 + H2O a.

O2

b.

CO2

c.

H2O

d.

O2 and CO2

e.

CH4

ANSWER:

a

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Analysis

NOTES:

Seeing patterns

52. Which element is most reactive? a.

K

b.

Pb

c.

Fe

d.

Mg

e.

Cu

ANSWER:

a

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Knowledge

NOTES:

Observation and recall of information

53. Which element is least reactive? a.

Pb

b.

Zn

c.

Al

d.

Cu

e.

Fe

ANSWER:

d

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Knowledge

NOTES:

Observation and recall of information

54. Which reaction will not occur? a.

Mg(s) + CaSO4(aq) MgSO4(aq) + Ca(s)

b.

H2(g) + AgNO3(aq) HNO3(aq) + Ag(s)

c.

Ba(s) + HCl(aq) BaCl2(aq) + H2(g)

d.

Al(s) + SnCl2(aq) AlCl3(aq) + Sn(s)

e.

Mg(s) + CuSO4(aq) Cu(s) + MgSO4(aq)

ANSWER:

a

POINTS:

1

TOPICS:

3.5 Oxidation-Reduction and Electron Transfer

OTHER:

Comprehension

NOTES:

Predict consequences

55. In the reaction given below, how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of oxygen gas are produced?

2 H2O 2 H2 + O2 a.

36.0 g

b.

2.0 g

c.

18.0 g

d.

20.0 g

e.

4.0 g

ANSWER:

a

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

56. In the reaction given below, how many grams of sodium metal are consumed if 2.02 g of hydrogen gas are produced?

2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)

a.

92.0 g

b.

46.0 g

c.

5.75 g

d.

11.5 g

e.

23.0 g

ANSWER:

b

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

57. How many moles of H2O are formed from the complete combustion of 45.0 g of methanol, CH3OH? 2 CH3OH + 3 O2 2 CO2 + 4 H2O a.

2.81 mol

b.

0.711 mol

c.

1.41 mol

d.

50.6 mol

e.

1.42 mol

ANSWER:

a

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

58. How many moles of O2 will be produced by the decomposition of 32.0 grams of hydrogen peroxide, H2O2?

2 H2O2 2 H2O + O2 a.

34.0 mol

b.

544 mol

c.

1.88 mol

d.

0.941 mol

e.

0.470 mol

ANSWER:

e

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

59. How many grams of ammonia will be formed from the complete reaction of 0.237 moles of H2?

N2 + 3 H2 2 NH3 a.

4.04 g

b.

6.06 g

c.

0.158 g

d.

2.69 g

e.

0.237 g

ANSWER:

d

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

60. How many moles of oxygen will be produced if 27.6 grams of Al are produced?

2 Al2O3 4 Al + 3 O2 a.

24.6 mol

b.

0.767 mol

c.

1.02 mol

d.

12.3 mol

e.

0.256 mol

ANSWER:

b

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

61. How many grams of CuCl are formed from the complete reaction of 0.750 mol Cu? 2 Cu + Cl2 2 CuCl a.

32.2 g

b.

43.6 g

c.

101 g

d.

148.5 g

e.

74.5 g

ANSWER:

e

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

62. How many grams of TiCl4 are needed to produce 0.132 moles of MgCl2?

2 Mg + TiCl4 Ti + 2 MgCl2

a.

6.26 g

b.

12.5 g

c.

50.1 g

d.

12.6 g

e.

25.0 g

ANSWER:

b

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

63. How many grams of KClO3 are needed to produce of 4.26 moles of O2?

2 KClO3 2 KCl + 3 O2 a.

136 g

b.

522 g

c.

348 g

d.

174 g

e.

783 g

ANSWER:

c

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

64. How many grams of Fe2O3 are formed by the complete reaction of 6.75 moles of iron?

4 Fe + 3 O2 2 Fe2O3 a.

539 g

b.

242 g

c.

701 g

d.

1080 g

e.

350 g

ANSWER:

a

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

65. How many grams of Al2O3 are formed by the complete reaction of 48.5 g of Fe2O3?

Fe2O3 + 2 Al Al2O3 + 2 Fe

a.

62.4 g

b.

26.1 g

c.

37.7 g

d.

139 g

e.

31.0g

ANSWER:

e

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

66. How many grams of Na2O are formed by the complete reaction of 35.0 g of O2?

4 Na + O2 2 Na2O a.

56.7 g

b.

113 g

c.

67.8 g

d.

136 g

e.

33.9 g

ANSWER:

d

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

67. How many grams of H2 must react to produce of 75.0 g of PH3?

2 P + 3 H2 2 PH3 a.

6.67 g

b.

75.0 g

c.

4.45 g

d.

2.97 g

e.

113 g

ANSWER:

a

POINTS:

1

TOPICS:

3.6 The Mole and Chemical Reactions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

68. In the reaction below, 8.0 g of H2 react with 7.0 g of O2. Which of the following statements is incorrect?

2 H2 + O2 2 H2O

a.

More moles of hydrogen are consumed than moles of oxygen.

b.

More grams of water are produced than grams of oxygen are consumed.

c.

More grams of oxygen are consumed than grams of hydrogen.

d.

More grams of hydrogen are consumed than grams of oxygen.

e.

More moles of water are produced than moles of oxygen are consumed.

ANSWER:

d

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

69. In the reaction given below, how many grams of C14H9Cl5 will be produced by the reaction of 25.0 g of each of the starting materials?

C2HOCl3 + 2 C6H5Cl C14H9Cl5 + H2O a.

78.7 g

b.

121 g

c.

157 g

d.

354 g

e.

39.4 g

ANSWER:

e

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

70. The plot represent a series of reactions. For each reaction, the initial mass of bromine is the same but the initial mass of iron (Fe) is changed.

Which statement is correct? a.

Bromine is the limiting reagent when 1 gram of iron is reacted.

b.

The limiting reagent is the iron when you start with 4 grams.

c.

The limiting reagent is bromine in all reactions.

d.

A reaction with 6 grams of iron would result in more than 12 grams of product

e.

The limiting reagent is iron in all reactions.

ANSWER:

b

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Analysis

NOTES:

Seeing patterns, recognition of hidden meanings

71. Methane and oxygen react to produce carbon dioxide and water. If you observe multiple experiments where the mass of methane is held constant and the mass of oxygen is increased in each new experiment, what is

expected?

The mass of water produced a.

Increases proportionally in initial experiments then eventually starts to decrease proportionally as more oxyge

b.

Increases proportionally to the mass of oxygen added.

c.

Increases proportionally in initial experiments then eventually becomes constant even when more oxygen is a

d.

Is constant regardless of the amount of oxygen added

e.

Decreases as more carbon dioxide is produced

ANSWER:

c

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Analysis

NOTES:

Predict consequences

72. How many grams of HCl are required to completely react with 25.0 g of aluminum?

2 Al + 6 HCl 2 AlCl3 + 3 H2 a.

67.5 g

b.

102 g

c.

22.6 g

d.

136 g

e.

248 g

ANSWER:

b

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

73. How many grams of CO2 are produced from the reaction of 5.00 g of C2H6 with 25.0 g of O2?

2 C2H6 + 7 O2 4 CO2 + 6 H2O a.

14.6 g

b.

3.66 g

c.

7.51 g

d.

30.0 g

e.

19.6 g

ANSWER:

a

POINTS:

1

TOPICS:

3.7 Limiting Reactant

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

74. Given the combustion reaction of a sugar.

C6H12O6(s) + 6 O2(g) 6 CO2(g) + 6 H2O(g) Which experiment would produce the most CO2? a.

React 1 mole of sugar with 3 moles of oxygen.

b.

React 1 mole of sugar with 1 mole of oxygen.

c.

React 0.5 moles of sugar with 6 moles of oxygen.

d.

React 1 mole of sugar with 4 moles of oxygen

e.

React 0.5 moles of sugar with 3 moles of oxygen

ANSWER:

d

POINTS:

1

TOPICS:

3.7 Limiting Reactant

75. What is the maximum possible quantity of product obtained from a chemical reaction called? a.

stoichiometric coefficients

b.

theoretical yield

c.

molecular weight of the product

d.

percent yield

e.

limiting reactant

ANSWER:

b

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Knowledge

NOTES:

Observation and recall of information

76. The efficiency of a particular synthesis method is evaluated by determining the: a.

stoichiometric coefficients.

b.

limiting reactant.

c.

theoretical yield.

d.

molecular weight of the product.

e.

percent yield.

ANSWER:

e

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Knowledge

NOTES:

Observation and recall of information

77. If 32.0 g of oxygen reacts with sufficient magnesium to produce magnesium oxide, what is the theoretical yield?

2 Mg + O2 2 MgO

a.

20.2 g

b.

80.6 g

c.

32.0 g

d.

40.3 g

e.

161 g

ANSWER:

b

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

78. If 110.0 g of iron reacts with 64.0 g of oxygen, what is the theoretical yield of Fe2O3?

4 Fe + 3 O2 2 Fe2O3 a.

157.3 g

b.

314.9 g

c.

212.9 g

d.

629.2 g

e.

319.4 g

ANSWER:

a

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

79. If 225 g of carbon reacts with excess sulfur dioxide to produce 195 g of carbon disulfide, what is the percent yield for the reaction?

5 C + 2 SO2 CS2 + 4 CO a.

15.7%

b.

19.5%

c.

22.5%

d.

68.4%

e.

78.9%

ANSWER:

d

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

80. If 3.45 g of magnesium reacts with 4.87 g of oxygen to produce 5.07 g magnesium oxide, what is the percent yield for the reaction?

2 Mg + O2 2 MgO

a.

88.6%

b.

41.3%

c.

68.0%

d.

60.9%

e.

82.8%

ANSWER:

a

POINTS:

1

TOPICS:

3.8 Evaluating Chemical Synthesis: Percent Yield

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

81. The complete reaction of 16.12 g of titanium with 23.88 g of chlorine (Cl2) produces a compound with the formula TixCly. What is the empirical formula of the compound? a.

TiCl

b.

TiCl4

c.

Ti4Cl

d.

Ti2Cl

e.

TiCl2

ANSWER:

e

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

82. The complete reaction of 2.63 g of iron with 3.34 g of chlorine (Cl2) produces a compound with the formula FexCly. What is the empirical formula of the compound? a.

FeCl4

b.

FeCl2

c.

FeCl

d.

FeCl3

e.

FeCl5

ANSWER:

b

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

83. Which reaction is analogous to the reaction used in combustion analysis?

a.

H2(g) + Cl2(g) → 2 HCl(g)

b.

CH4(g) → C(s) + 2 H2(g)

c.

2 H2O(l) → 2 H2(g) + O2(g)

d.

S8(s) +8 O2(g) → 8 SO2(g)

e.

2 HgO(s) → 2 Hg(l) + O2(g)

ANSWER:

d

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Synthesis

84. Which statement regarding the complete combustion of a carbon compound is correct? a.

Oxygen is consumed in the reaction and must be shown in the balanced equation.

b.

Carbon dioxide and water are consumed in the reaction and must be shown in the balanced equation.

c.

Heat is produced in the reaction and must be shown in the balanced equation.

d.

The carbon compound is consumed in the reaction but need not be shown in the balanced equation.

e.

Balancing the equation requires knowing whether the products are gases or liquids.

ANSWER:

a

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Knowledge

85. The complete combustion of a hydrocarbon produces 16.48 g of CO2 and 4.508 g of H2O. What is the empirical formula of the hydrocarbon? a.

CH2

b.

C3H8

c.

C2H5

d.

C3H4

e.

CH

ANSWER:

d

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

86. When 3.000 g of a compound containing only carbon, hydrogen, and oxygen is burned, 6.820 g CO2 and 2.792 g H2O are produced. What is the empirical formula of the compound? a.

C2H4O

b.

C2H3O2

c.

C3H6O

d.

CH2O

e.

C3H3O2

ANSWER:

c

POINTS:

1

TOPICS:

3.9 Composition and Empirical Formulas

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

87. How many moles of NaOH are present in 25.0 mL of a 0.1000 M NaOH solution? a.

100 mol

b.

2.50 mol

c.

2.50 × 10−3 mol

d.

25.0 mol

e.

0.100 mol

ANSWER:

c

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

88. What is the molarity of a solution that results when 3.64 g KCl is dissolved in water and diluted to exactly 200.0 mL? a.

1.82 M

b.

0.0182 M

c.

0.102 M

d.

0.244 M

e.

0.00977 Μ

ANSWER:

d

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

89. Determine the ammonium ion concentration of a solution that results when 4.53 g of (NH4)2SO4 is dissolved in water and diluted to exactly 100.0 mL. a.

1.37 M

b.

0.686 M

c.

2.51 M

d.

1.03 M

e.

0.343 M

ANSWER:

b

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using requied skills or knowledge

90. Determine the volume of solution that contains 15.0 g of AgNO3 if the solution is 0.375 M. a.

33.1 mL

b.

235 mL

c.

956 mL

d.

31.5 mL

e.

247 mL

ANSWER:

b

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

91. A 50.0 mL sample of 0.108 M H2SO4 is diluted to 250.0 mL. What is its new molarity? a.

0.184 M

b.

0.0216 M

c.

0.542 M

d.

0.108 M

e.

0.461 M

ANSWER:

b

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowdge

92. If a 45.0 mL sample of 2.20 M Na2SO4 is diluted to yield a final solution that is 0.110 M in sodium ions, what is the volume of the final solution? a.

4500 mL

b.

900 mL

c.

450 mL

d.

1800 mL

e.

110 mL

ANSWER:

d

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

93. When a solution is diluted, what is the relationship of the number of moles of solute in the more concentrated initial volume of solution to the number of moles of solute in the less concentrated final volume of solution? a.

The ratio of the numbers is directly proportional to the two volumes.

b.

The ratio of the numbers is inversely proportional to the two volumes.

c.

The number of moles of solute in the more concentrated initial volume is always greater.

d.

The number of moles of solute in the more concentrated initial volume is always less.

e.

The number of moles of solute in both solutions is the same.

ANSWER:

e

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Comprehension

NOTES:

Interpret facts

94. Which of the methods described below will yield 500 mL of a 0.100 M KMnO4 solution? a.

Dissolve 15.8 g KMnO4 in water and dilute to exactly 500 mL.

b.

Dissolve 7.90 g of KMnO4 in water and dilute to exactly 500 mL.

c.

Add exactly 500 mL of water to KMnO4.

d.

Dilute 220 mL of 1.00 M KMnO4 to exactly 500 mL.

e.

Add exactly 500 mL of water to 7.90 g of KMnO 4.

ANSWER:

b

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Evaluation

NOTES:

Compare and discriminate between ideas

95. How many grams of KCl are in 125.0 mL of 0.375 M KCl? a.

3.49 × 10−3 g

b.

46.9 g

c.

0.938 g

d.

3.49 g

e.

0.0469 g

ANSWER:

d

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

96. How many moles of ions are in 285 mL of 0.0150 M MgCl2? a.

5.26 × 10−2 mol

b.

1.28 × 10−2 mol

c.

1.05 × 10−1 mol

d.

4.128 × 10−3 mol

e.

5.26 × 10−1 mol

ANSWER:

b

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

97. A solution is prepared by dissolving 20.0 g of NaI in enough water to make 300.0 mL of solution. How many moles of ions are in 25.0 mL of this solution? a.

0.0222 mol

b.

0.445 mol

c.

0.0445 mol

d.

0.111 mol

e.

0.0111 mol

ANSWER:

a

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

98. A solution is made by dissolving 60.0 g of AlCl3 in enough water to make 250.0 mL of solution. How many moles of chloride ions are in 5.00 mL of solution? a.

1.25 × 10−3 mol

b.

9.00 × 10−3 mol

c.

3.00 × 10−3 mol

d.

1.80 × 10−2 mol

e.

2.70 × 10−2 mol

ANSWER:

e

POINTS:

1

TOPICS:

3.10 Solution Concentration: Molarity

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge

99. How many grams of PbI2 will precipitate from the reaction of 14.0 mL of 0.190 M Pb(NO3)2 with excess KI solution? Assume that all of the PbI2 is insoluble. a.

6260 g

b.

3.69 g

c.

1.33 g

d.

1.23 g

e.

2.66 g

ANSWER:

d

POINTS:

1

TOPICS:

3.11 Stoichiometry in Aqueous Solutions

OTHER:

Application

NOTES:

Solve problems using required skills or knowledge