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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1.
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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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2.
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a reaction in which a single compound is broken down into simpler
substances
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3.
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a reaction in which oxygen reacts with another substance, often producing heat
or light
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4.
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a list of metals in order of decreasing reactivity
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MC Identify the choice that best
completes the statement or answers the question.
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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. | 4.80 x 1024 atoms | c. | 2.40 x 1024
atoms | b. | 6.02 x 1023 atoms | d. | 1.20 x 1024
atoms |
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6.
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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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7.
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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. | 1, 6, 2, 3 | c. | 2, 12, 4,
6 | d. | 4, 6, 2, 3 |
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8.
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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. | more energy levels as you go down a
group | c. | fewer electrons in the highest occupied energy level | d. | an increase in
number of protons |
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9.
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Which of the following is true about the composition of ionic compounds?
a. | They are composed of anions and cations. | b. | They are formed from
two or more nonmetallic elements. | c. | They are composed of cations
only. | d. | They are composed of anions only. |
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10.
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In the chemical equation H  O  ( aq) ® H  O( l)  O  ( g), the  is a ____. a. | product | b. | solid | c. | catalyst | d. | reactant |
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11.
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In a combustion reaction, one of the reactants is
a. | nitrogen. | b. | oxygen. | c. | a
metal. | d. | hydrogen. |
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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 H on the activity series. | b. | Heat must be
supplied for the reaction. | c. | A precipitate must be
formed. | d. | Al must be above Cl on the activity series. |
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13.
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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. | 1.00 mol | b. | 16.0 mol | c. | 0.063 5
mol | d. | 4.00 mol |
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14.
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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. | 3.00 mol | c. | 1.00 mol | b. | 2.50 mol | d. | 1.50 mol |
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15.
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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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16.
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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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17.
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One of the products when aqueous Na  CO  reacts with aqueous Sn(NO  )  is a. | NaNO | b. | CNO | c. | NaSn | d. | Sn(CO ) |
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18.
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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. | 32.0 g | c. | 2.00
g | d. | 2.88 g |
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19.
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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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20.
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Which of the following is true about limiting and excess reagents?
a. | Both reagents are left over after the reaction is complete. | b. | A balanced equation
is not necessary to determine which reactant is the limiting reagent. | c. | The reactant that
has the smallest given mass is the limiting reagent. | d. | The amount of product is determined by the
limiting reagent. |
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21.
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Which of the following is a balanced equation representing the decomposition of
lead(IV) oxide?
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22.
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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. | 653 g | b. | 147 g | c. | 1.22
g | d. | 6.7 g |
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23.
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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. | 42.0 moles | b. | 0.667 moles | d. | 1.50 moles |
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24.
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In which of the following is the name and formula given correctly?
a. | sodium oxide, NaO | b. | tin (IV) fluoride, SnF | c. | barium nitride, BaN | d. | cobaltous chloride,
CoCl |
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25.
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What is the formula mass of calcium nitrate,
Ca(NO3)2?
a. | 102 g | c. | 164 g | b. | 150 g | d. | 70.0 g |
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26.
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What are the coefficients that will balance the equation below? N  + H   NH  a. | 3, 1, 2 | b. | 1, 1, 2 | c. | 1, 3,
2 | d. | 1, 3, 3 |
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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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Which of the following compounds is NOT an ionic
compound?
a. | CO2 | c. | NaCl | b. | MgBr2 | d. | Li(NO3) |
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29.
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Why do atoms share electrons in covalent bonds?
a. | to become ions and attract each other | b. | to increase their atomic
numbers | c. | to become more polar | d. | to attain a full valence energy level and
become stable |
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30.
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How many valence electrons are in a silicon atom?
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31.
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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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32.
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In a double-replacement reaction, the
a. | reactants are two elements. | b. | reactants are two ionic
compounds. | c. | products are always molecular. | d. | products are a new element and a new
compound. |
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