Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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What
is the molar mass of nitroglycerine,
C3H5(ONO2)3? a. | 41.07
g/mol | b. | 227.1 g/mol | c. | 103.1
g/mol | d. | 165.1 g/mol | e. | 204
g/mole | | |
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2.
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How
many moles are there in 5.00 g of AgNO3? a. | 5.00
mol | b. | 0.0294
mol | c. | 8.49
mol | d. | 0.00112
mol | e. | 34.0
mol | | |
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3.
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What
is the mass percent of each element in chloroform, CHCl3? a. | 10.06% C, 60.24%
H, 29.70% Cl | b. | 20.00% C, 20.00% H, 60.00% Cl | c. | 24.10% C, 3.11%
H, 72.79% Cl | d. | 33.87% C, 0.22% H, 65.91% Cl | e. | 10.06% C, 0.84%
H, 89.09% Cl | | |
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4.
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Nitrogen and oxygen form an extensive series of oxides with the general formula
NxOy. What is the empirical formula for an oxide that contains 63.65%
nitrogen? a. | N2O | b. | NO | c. | NO2 | d. | N2O3 | e. | N2O5 | | |
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5.
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Methane reacts with oxygen to form carbon dioxide and
water.
CH4(g) + 2 O2(g) ®
CO2(g) + 2 H2O(g)
All of the following statements concerning this reaction are correct
EXCEPT a. | two moles of
water are formed per one mole of methane consumed. | b. | two molecules of
oxygen are consumed per one mole of methane consumed. | c. | the combined
mass of reactants consumed equals the mass of products formed. | d. | two grams of
oxygen are consumed per each gram of carbon dioxide formed. | e. | three moles of
gases are formed per each three moles of gases consumed. | | |
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6.
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Sulfur dioxide may be prepared by the reaction of sulfur with oxygen gas according to
the chemical equation below.
__
S8(s) + __ O2(g) ® __ SO2(g)
What are the respective coefficients when the equation is balanced
with the smallest whole numbers? a. | 8, 8, 8 | b. | 2, 16,
8 | c. | 1, 8,
8 | d. | 2, 16,
16 | e. | 1, 2,
1 | | |
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7.
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The
balanced equation for the complete combustion of benzene, C6H6,
is a. | C6H6(ª) + 12 H2O ® 6 CO2(g) + 15
H2(g) | b. | C6H6(ª) ® 6 C(s) + 3
H2(g) | c. | 2 C6H6(ª) + 9
O2(g) ® 12 CO (g) + 6 H2O(g) | d. | C6H6(ª) + O2(g) ® CO2(g) +
H2O(g) | e. | 2 C6H6(ª) + 15
O2(g) ® 12 CO2(g) + 6 H2O(g) | | |
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8.
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Dinitrogen trioxide, a blue solid, dissociates to form nitrogen monoxide and nitrogen
dioxide gases. What mass of nitrogen dioxide is formed from the decomposition of 12.8 g of
N2O3? a. | 5.05 g | b. | 6.40
g | c. | 7.75
g | d. | 12.8
g | e. | 21.1
g | | |
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9.
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Dinitrogen pentaoxide reacts with water to produce nitric acid. Write a balanced
chemical equation for this reaction. a. | N2O5(s) + H2O(ª) ® 2
HNO3(aq) | b. | N2O3(s) + H2O(ª) ® 2
HNO2(aq) | c. | N2O4(s) + 2 H2O(ª) ® 2
H2NO3(aq) | d. | N2O5(s) + 2 H2O(ª) ® 2
H2NO3(aq) | e. | 2 N2O5(s) + 6 H2O(ª) ® 4
H3NO3(aq) | | |
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10.
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Iron
reacts with hydrochloric acid to produce iron (II) chloride and hydrogen
gas.
Fe(s) + 2 HCl(aq) ® FeCl2(aq) +
H2(g)
How many moles of HCl will react with 3.5 moles of
Fe? a. | 1.0
mol | b. | 1.8
mol | c. | 2.0
mol | d. | 7.0
mol | e. | 8.5 | | |
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11.
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The
complete combustion of 2.0 moles of butane gas, C4H10, will a. | consume 13 mol
O2 and produce 8.0 mol H2O. | b. | consume 5.0 mol
O2 and produce 13 mol CO2. | c. | consume 7.0 mol
O2 and produce 8.0 mol CO2. | d. | produce 8 mol
CO2 and 5.0 mol H2O. | e. | consume 13 mol O2 and produce 8.0 mol
CO2. | | |
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12.
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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(ª) ® C9H8O4(s) +
C2H4O2(ª)
If you mix 10.0
grams of each reactant, how many grams of aspirin (M = 180.2 g/mol) can theoretically by
obtained? a. | 7.30
g | b. | 7.66
g | c. | 9.32
g | d. | 12.7
g | e. | 13.0
g | | |
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13.
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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(ª) ® C9H8O4(s) +
C2H4O2(ª)
If 1.02 g of
C9H8O4 (M = 180.2 g/mol) is produced from the reaction of
3.00 g C7H6O3 and 5.40 g C4H6O3,
what is the percent yield? a. | 7.11% | b. | 11.6% | c. | 15.9% | d. | 26.1% | e. | 43.1% | | |
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14.
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Under
certain conditions the reaction below will proceed at 28.2% yield of NO. How many grams of
NH3 must be reacted with excess oxygen to yield 125 g of NO?
4 NH3(g) + 5 O2(g) ® 4 NO(g) + 6
H2O(g)
a. | 252 g | b. | 277
g | c. | 443
g | d. | 518
g | e. | 568
g | | |
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15.
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Acetylsalicylic acid, commonly known as aspirin, has 9 carbon atoms, 8 hydrogen atoms,
and 4 oxygen atoms per molecule. What is the molecular formula of aspirin? a. | C9H8O4 | b. | Ca9H8O2 | c. | C9He8O4 | d. | C9H8Ox4 | e. | C9(HO4)2 | | |
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Numeric Response
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16.
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In
the blank below enter your score for Module five test so that your improvement may be added to your
test score.
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