MC Identify the choice that best
completes the statement or answers the question.
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1.
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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. | 147 g | b. | 653 g | c. | 1.22
g | d. | 6.7 g |
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2.
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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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3.
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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 anions and
cations. | c. | They are composed of cations only. | d. | They are formed from two or more nonmetallic
elements. |
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4.
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Which of the following compounds is NOT an ionic
compound?
a. | Li(NO3) | c. | MgBr2 | b. | NaCl | d. | CO2 |
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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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How many valence electrons are in a silicon atom?
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7.
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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. | The reactant that
has the smallest given mass is the limiting reagent. | c. | Both reagents are left over after the reaction
is complete. | d. | A balanced equation is not necessary to determine which reactant is the limiting
reagent. |
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8.
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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. | 33.6 moles | c. | 0.667 moles | b. | 42.0 moles | d. | 1.50 moles |
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9.
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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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10.
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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. | 1.6 mol | c. | 0.8
mol | d. | 2.4 mol |
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11.
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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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12.
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In a combustion reaction, one of the reactants is
a. | a metal. | b. | nitrogen. | c. | oxygen. | d. | hydrogen. |
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13.
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In order for the reaction 2Al  6HCl  2AlCl   3H  to occur, which of the following must
be true? a. | Heat must be supplied for the reaction. | b. | A precipitate must
be formed. | c. | Al must be above Cl on the activity series. | d. | Al must be above H
on the activity series. |
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14.
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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. | 4, 6, 2, 3 | b. | 2, 12, 4, 6 | c. | 1, 3, 2,
3 | d. | 1, 6, 2, 3 |
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15.
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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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16.
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In which of the following is the name and formula given correctly?
a. | cobaltous chloride, CoCl | b. | tin (IV) fluoride,
SnF | c. | sodium oxide,
NaO | d. | barium nitride, BaN |
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17.
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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. | 1.50 mol | c. | 3.00 mol | b. | 2.50 mol | d. | 1.00 mol |
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18.
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In a double-replacement reaction, the
a. | reactants are two ionic compounds. | b. | reactants are two elements. | c. | products are always
molecular. | d. | products are a new element and a new compound. |
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19.
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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. | 2.00 g | b. | 1.00 g | c. | 32.0
g | d. | 2.88 g |
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20.
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Which of the following is a balanced equation representing the decomposition of
lead(IV) oxide?
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21.
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What is the formula mass of calcium nitrate,
Ca(NO3)2?
a. | 102 g | c. | 150 g | b. | 70.0 g | d. | 164 g |
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22.
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One of the products when aqueous Na  CO  reacts with aqueous Sn(NO  )  is a. | Sn(CO ) | b. | CNO | c. | NaSn | d. | NaNO |
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23.
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Which of the following factors contributes to the increase in atomic size within
a group on the periodic table?
a. | an increase in size of the nucleus | b. | an increase in number of
protons | c. | more energy levels as you go down a group | d. | fewer electrons in
the highest occupied energy level |
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24.
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What are the coefficients that will balance the equation below? N  + H   NH  a. | 1, 3, 3 | b. | 3, 1, 2 | c. | 1, 1,
2 | d. | 1, 3, 2 |
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25.
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In the chemical equation H  O  ( aq) ® H  O( l)  O  ( g), the  is a ____. a. | catalyst | b. | reactant | c. | product | d. | solid |
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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. | 4.00 mol | b. | 0.063 5 mol | c. | 1.00
mol | d. | 16.0 mol |
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27.
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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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28.
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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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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 oxygen reacts with another substance, often producing heat
or light
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30.
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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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31.
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a reaction in which a single compound is broken down into simpler
substances
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32.
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a list of metals in order of decreasing reactivity
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