MC Identify the choice that best
completes the statement or answers the question.
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1.
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What is the formula mass of calcium nitrate,
Ca(NO3)2?
a. | 164 g | c. | 102 g | b. | 150 g | d. | 70.0 g |
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2.
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Ethanol (C2H5OH) is used in hand sanatizer. If 115
grams of C2H5OH is used to to make a batch of hand sanatizer, then how many
moles are present in the batch? (MM: 46.08 g/mol)
a. | 1.00 mol | c. | 3.00 mol | b. | 1.50 mol | d. | 2.50 mol |
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3.
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Sulfur dioxide is the cause of acid rain and is common pollutant caused by
volcanic eruptions, the burning of fossil fuels, and the exhaust from industrial facilities.
What is the mass in gram of 0.75 mole of SO2? (MM: 64.07 g/mol)
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4.
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A person attemps to fill their car tires with 9.03x1023 molecules of
nitrogen gas (N2). How many moles did the person attempt to put in the tires?
a. | 0.667 moles | c. | 33.6 moles | b. | 1.50 moles | d. | 42.0 moles |
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5.
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A neon sign is being made with 80 grams of neon. How many atoms are
contained the neon sign?
a. | 6.02 x 1023 atoms | c. | 2.40 x 1024
atoms | b. | 1.20 x 1024 atoms | d. | 4.80 x 1024
atoms |
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6.
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What is the percent composition by mass of sulfur in the compound
MgSO4 (gram-formula mass = 120. g/mol)?
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7.
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In the chemical equation H  O  ( aq) ® H  O( l)  O  ( g), the  is a ____. a. | catalyst | b. | solid | c. | product | d. | reactant |
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8.
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What are the coefficients that will balance the equation below? N  + H   NH  a. | 1, 1, 2 | b. | 1, 3, 3 | c. | 3, 1,
2 | d. | 1, 3, 2 |
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9.
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Chemical equations must be balanced to satisfy
a. | the law of definite proportions. | b. | the law of multiple
proportions. | c. | the law of conservation of mass. | d. | Avogadro’s
principle. |
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10.
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When the equation KClO  ( s)  KCl( s) + O  ( g) is balanced, the coefficient of KClO 3 is
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11.
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What are the missing coefficients for the skeleton equation below?
Al  (SO  )  ( aq) 
KOH( aq) ® Al(OH)  ( aq)  K  SO  ( aq) a. | 1, 3, 2, 3 | b. | 2, 12, 4, 6 | c. | 4, 6, 2,
3 | d. | 1, 6, 2, 3 |
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12.
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In order for the reaction 2Al  6HCl  2AlCl   3H  to occur, which of the following must
be true? a. | Al must be above Cl on the activity series. | b. | Al must be above H
on the activity series. | c. | Heat must be supplied for the
reaction. | d. | A precipitate must be formed. |
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13.
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In a combustion reaction, one of the reactants is
a. | hydrogen. | b. | nitrogen. | c. | oxygen. | d. | a metal. |
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14.
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In a double-replacement reaction, the
a. | products are always molecular. | b. | reactants are two ionic
compounds. | c. | reactants are two elements. | d. | products are a new element and a new
compound. |
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15.
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Which of the following is a balanced equation representing the decomposition of
lead(IV) oxide?
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16.
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One of the products when aqueous Na  CO  reacts with aqueous Sn(NO  )  is a. | NaNO | b. | NaSn | c. | Sn(CO ) | d. | CNO |
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17.
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How many valence electrons are in a silicon atom?
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18.
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Which of the following is true about the composition of ionic compounds?
a. | They are composed of anions only. | b. | They are composed of cations
only. | c. | They are formed from two or more nonmetallic elements. | d. | They are composed of
anions and cations. |
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19.
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Which of the following compounds is NOT an ionic
compound?
a. | MgBr2 | c. | CO2 | b. | NaCl | d. | Li(NO3) |
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20.
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In which of the following is the name and formula given correctly?
a. | tin (IV) fluoride, SnF | b. | cobaltous chloride,
CoCl | c. | barium nitride,
BaN | d. | sodium oxide, NaO |
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21.
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Why do atoms share electrons in covalent bonds?
a. | to become more polar | b. | to become ions and attract each
other | c. | to attain a full valence energy level and become stable | d. | to increase their
atomic numbers |
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22.
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Which of the following factors contributes to the increase in atomic size within
a group on the periodic table?
a. | fewer electrons in the highest occupied energy level | b. | an increase in
number of protons | c. | more energy levels as you go down a
group | d. | an increase in size of the nucleus |
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23.
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In the reaction 2CO( g) + O  ( g) ® 2CO  ( g), what is the ratio of moles
of oxygen used to moles of CO  produced?
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24.
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How many moles of aluminum are needed to react completely with 1.2 mol of
FeO? 2Al( s) + 3FeO( s) ® 3Fe( s) + Al  O  ( s) a. | 1.2 mol | b. | 0.8 mol | c. | 1.6
mol | d. | 2.4 mol |
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25.
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The equation below shows the decomposition of lead nitrate. How many grams of
oxygen are produced when 11.5 g NO  is formed?  a. | 1.00 g | b. | 2.00 g | c. | 2.88
g | d. | 32.0 g |
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26.
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How many moles of H  PO  are produced when 71.0 g P  O  reacts completely to form H  PO  ?  a. | 0.063 5 mol | b. | 1.00 mol | c. | 4.00
mol | d. | 16.0 mol |
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27.
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How many grams of H  PO  are produced when 10.0 moles of water react with an excess of P  O  ?  a. | 1.22 g | b. | 6.7 g | c. | 147
g | d. | 653 g |
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28.
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Which of the following is true about limiting and excess reagents?
a. | The amount of product is determined by the limiting reagent. | b. | A balanced equation
is not necessary to determine which reactant is the limiting reagent. | c. | Both reagents are
left over after the reaction is complete. | d. | The reactant that has the smallest given mass
is the limiting reagent. |
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Matching
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Match each item with the correct statement below. a. | activity series of metals | c. | combustion
reaction | b. | single-replacement reaction | d. | decomposition reaction |
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29.
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a reaction in which a single compound is broken down into simpler
substances
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30.
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a reaction in which oxygen reacts with another substance, often producing heat
or light
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31.
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a reaction in which the atoms of one element replace the atoms of a second
element in a compound
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32.
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a list of metals in order of decreasing reactivity
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