Question 1

What is the percent composition of water (H2O) by mass?

Accepted Answer

11.2% hydrogen, 88.8% oxygen

Answer

50% hydrogen, 50% oxygen

Answer

25% hydrogen, 75% oxygen

Answer

33.3% hydrogen, 66.7% oxygen

Question 2

What is the balanced equation for the combustion of butane (C4H10)?

Accepted Answer

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O

Answer

C4H10 + 3 O2 → 4 CO2 + 3 H2O

Answer

2 C4H10 + 7 O2 → 8 CO2 + 6 H2O

Answer

C4H10 + 5 O2 → 4 CO2 + 2 H2O

Question 3

What is the Gram Formula Mass (GFM) of sodium chloride (NaCl)?

Accepted Answer

58.44 g/mol

Answer

22.99 g/mol

Answer

74.55 g/mol

Answer

40.00 g/mol

Question 4

What is the correct chemical formula for sulfuric acid?

Accepted Answer

H2SO4

Answer

HSO4

Answer

H2SO3

Answer

H2S2O7

Question 5

What is the percent composition of carbon in carbon dioxide (CO2)?

Accepted Answer

27.3% carbon, 72.7% oxygen

Answer

20% carbon, 80% oxygen

Answer

33.3% carbon, 66.7% oxygen

Answer

50% carbon, 50% oxygen

Question 6

What is the correct name for the compound Fe2O3?

Accepted Answer

iron(III) oxide

Answer

ferric oxide

Answer

iron(II) oxide

Answer

iron oxide

Question 7

How would you write the chemical formula for aluminum sulfate?

Accepted Answer

Al2(SO4)3

Answer

AlSO4

Answer

Al3(SO4)2

Answer

Al(SO4)2

Question 8

What is the balanced equation for the reaction of hydrogen gas with oxygen gas to form water?

Accepted Answer

2 H2 + O2 → 2 H2O

Answer

3 H2 + O2 → 3 H2O

Answer

H2 + O2 → H2O

Answer

2 H2 + 2 O2 → 2 H2O

Question 9

What is the molar mass of glucose (C6H12O6)?

Accepted Answer

180.18 g/mol

Answer

162.14 g/mol

Answer

150.12 g/mol

Answer

198.20 g/mol

Question 10

What is the correct name for the compound NaHCO3?

Accepted Answer

sodium bicarbonate

Answer

sodium hydrogen carbonate

Answer

sodium carbonate

Answer

sodium acid carbonate

Question 11

What is the percent composition of oxygen in water (H2O)?

Accepted Answer

88.79%

Answer

50.00%

Answer

33.33%

Answer

18.02%

Question 12

What is the correct formula for sodium sulfate?

Accepted Answer

Na2SO4

Answer

NaSO3

Answer

Na2SO3

Answer

NaSO4

Question 13

Which of the following equations is balanced?

Accepted Answer

2H2 + O2 → 2H2O

Answer

H2 + 2O2 → H2O

Answer

H2 + O2 → H2O

Answer

2H2 + O2 → H2O

Question 14

What is the Gram Formula Mass (GFM) of calcium carbonate (CaCO3)?

Accepted Answer

100.09 g/mol

Answer

120.09 g/mol

Answer

78.06 g/mol

Answer

40.08 g/mol

Question 15

What is the name of the compound with the formula FeCl3?

Accepted Answer

Iron(III) chloride

Answer

Iron(II) chloride

Answer

Iron chloride

Answer

Iron(I) chloride

Question 16

What is the percent composition of hydrogen in ammonia (NH3)?

Accepted Answer

17.65%

Answer

50.00%

Answer

25.00%

Answer

35.00%

Question 17

What is the correct name for the compound MgO?

Accepted Answer

Magnesium oxide

Answer

Magnesium dioxide

Answer

Magnesium peroxoxide

Answer

Magnesium monoxide

Question 18

Which of the following correctly represents the balanced equation for the combustion of propane (C3H8)?

Accepted Answer

C3H8 + 5O2 → 3CO2 + 4H2O

Answer

C3H8 + 6O2 → 3CO2 + 4H2O

Answer

C3H8 + 3O2 → 3CO2 + 3H2O

Answer

C3H8 + 4O2 → 3CO2 + 4H2O

Question 19

What is the Gram Formula Mass (GFM) of glucose (C6H12O6)?

Accepted Answer

180.18 g/mol

Answer

162.12 g/mol

Answer

146.14 g/mol

Answer

174.22 g/mol

Question 20

What is the percent composition of carbon in carbon dioxide (CO2)?

Accepted Answer

27.29%

Answer

33.33%

Answer

75.00%

Answer

50.00%

Question 21

What is the percent composition of oxygen in water (H2O)?

Accepted Answer

88.8%

Answer

50.0%

Answer

100%

Answer

33.3%

Question 22

What is the molecular formula of glucose?

Accepted Answer

C6H12O6

Answer

C4H8O4

Answer

C5H10O5

Answer

C6H6O6

Question 23

What is the balanced equation for the combustion of propane (C3H8)?

Accepted Answer

C3H8 + 5O2 → 3CO2 + 4H2O

Answer

C3H8 + 4O2 → 3CO2 + 2H2O

Answer

C3H8 + 2O2 → CO2 + H2O

Answer

C3H8 + 3O2 → 3CO2 + 3H2O

Question 24

What is the gram formula mass of calcium carbonate (CaCO3)?

Accepted Answer

100.09 g/mol

Answer

98.00 g/mol

Answer

84.01 g/mol

Answer

78.09 g/mol

Question 25

What is the name of the compound with the formula NaCl?

Accepted Answer

Sodium chloride

Answer

Calcium chloride

Answer

Sodium oxide

Answer

Sodium sulfate

Question 26

What is the percent composition of carbon in carbon dioxide (CO2)?

Accepted Answer

27.3%

Answer

10.0%

Answer

72.7%

Answer

50.0%

Question 27

What is the balanced equation for the reaction of aluminum with hydrochloric acid (HCl)?

Accepted Answer

2Al + 6HCl → 2AlCl3 + 3H2

Answer

Al + 3HCl → AlCl3 + 1.5H2

Answer

2Al + 3HCl → AlCl3 + 3H2

Answer

Al + 6HCl → AlCl3 + 3H2

Question 28

What is the molecular formula of ammonium sulfate?

Accepted Answer

(NH4)2SO4

Answer

NH4SO4

Answer

N2H8S1O4

Answer

NH4S2O4

Question 29

What is the gram formula mass of sulfuric acid (H2SO4)?

Accepted Answer

98.09 g/mol

Answer

96.06 g/mol

Answer

82.07 g/mol

Answer

74.09 g/mol

Question 30

What is the percent composition of hydrogen in ammonia (NH3)?

Accepted Answer

17.65%

Answer

33.33%

Answer

50.0%

Answer

25.0%

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