Matching (Value 9)
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Match each item with the correct statement below. a. | product | d. | balanced equation | b. | reactant | e. | skeleton equation | c. | chemical
equation |
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1.
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a chemical equation that does not indicate relative amounts of reactants and
products
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2.
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a new substance formed in a chemical reaction
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3.
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a starting substance in a chemical reaction
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4.
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a concise representation of a chemical reaction
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5.
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an equation in which each side has the same number of atoms of each
element
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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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6.
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a reaction in which a single compound is broken down into simpler
substances
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7.
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a reaction in which oxygen reacts with another substance, often producing heat
or light
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8.
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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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9.
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a list of metals in order of decreasing reactivity
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Multiple Choice (Value 41) Identify the choice that best completes the statement or answers
the question.
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10.
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Chemical reactions ____.
a. | occur only in living organisms | c. | only occur outside living
organisms | b. | create and destroy atoms | d. | produce new substances |
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11.
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Everyday equations describe ____.
a. | thermonuclear reactions | c. | chemical
reactions | b. | everyday processes | d. | biological chemistry |
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12.
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What does the symbol in a
chemical equation mean?
a. | Heat is supplied to the reaction. | c. | yields | b. | A catalyst is
needed. | d. | precipitate |
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13.
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Chemical equations ____.
a. | describe chemical reactions | b. | show how to write chemical
formulas | c. | give directions for naming chemical compounds | d. | describe only
biological changes |
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14.
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A skeleton equation does NOT show which of the following?
a. | the correct formulas of the reactants and products | b. | the reactants on the
left, the products on the right | c. | an arrow connecting the reactants to the
products | d. | the relative amounts of reactants and products |
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15.
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Symbols used in equations, together with the explanations of the symbols, are
shown below. Which set is correct?
a. | (g), grams | c. | (aq), dissolved in water | b. | (l),
liters | d. | (s), solid
product |
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16.
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A catalyst is ____.
a. | the product of a combustion reaction | b. | not used up in a reaction | c. | one of the reactants
in single-replacement reactions | d. | a solid product of a
reaction |
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17.
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Which of the following is the correct skeleton equation for the reaction that
takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?
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18.
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If you rewrite the following word equation as a balanced chemical equation, what
will the coefficient and symbol for fluorine be? nitrogen trifluoride nitrogen fluorine
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19.
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What are the coefficients that will balance the skeleton equation
below? AlCl + NaOH
Al(OH) NaCl
a. | 1, 3, 1, 3 | c. | 1, 1, 1, 3 | b. | 3, 1, 3, 1 | d. | 1, 3, 3, 1 |
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20.
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When the following equation is balanced, what is the coefficient for HCl?
Mg( s) HCl( aq)
MgCl ( aq) H ( g)
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21.
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Which of the following statements is NOT true about what happens in all chemical
reactions?
a. | The ways in which atoms are joined together are changed. | b. | New atoms are formed
as products. | c. | The starting substances are called reactants. | d. | The bonds of the
reactants are broken and new bonds of the products are formed. |
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22.
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Chemical equations must be balanced to satisfy ____.
a. | the law of definite proportions | c. | the law of conservation of
mass | b. | the law of multiple proportions | d. | Avogadro’s principle
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23.
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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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24.
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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 | c. | 4, 6, 2, 3 | b. | 2, 12, 4, 6 | d. | 1, 6, 2, 3 |
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25.
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The product of a combination reaction is Ba(OH) . If one of
the reactants is H O, what is the other reactant?
a. | BaO | c. | BaH | b. | BaO | d. | BaO |
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26.
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In order to predict whether or not a single-replacement reaction takes place,
you need to consult a chart that shows the ____.
a. | periodic table | b. | activity series of metals | c. | common polyatomic
ions | d. | ionic charges of representative elements |
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27.
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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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28.
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The products of a combustion reaction do NOT include ____.
a. | water | c. | carbon monoxide | b. | carbon dioxide | d. | hydrogen |
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29.
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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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30.
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Which of the following statements is NOT correct?
a. | The only way to determine the products of a reaction is to carry out the
reaction. | b. | All chemical reactions can be classified as one of five general
types. | c. | Complete combustion has occurred when all the carbon in the product is in the form of
carbon dioxide. | d. | A single reactant is the identifying characteristic of a decomposition
reaction. |
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31.
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Which of the following is a balanced equation representing the decomposition of
lead(IV) oxide?
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32.
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What are the correct formulas and coefficients for the products of the following
double-replacement reaction? RbOH H PO
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33.
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Which of the following statements is NOT true about the decomposition of a
simple binary compound?
a. | The products are unpredictable. | b. | The products are the constituent
elements. | c. | The reactant is a single substance. | d. | The reactant could be an ionic or a molecular
compound. |
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34.
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Which of the following statements is true about single-replacement
reactions?
a. | They are restricted to metals. | c. | Two reactants produce two
products. | b. | They involve a single product. | d. | Any metal replaces any other
metal. |
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35.
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Use the activity series of metals to complete a balanced chemical equation for
the following single replacement reaction. Ag( s) KNO ( aq)
a. | AgNO K | b. | AgK
NO | c. | AgKNO | d. | No reaction takes place because silver is less
reactive than potassium. |
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36.
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Which of the following statements is NOT true about double-replacement
reactions?
a. | The product may precipitate from solution. | b. | The product may be a
gas. | c. | The product may be a molecular compound. | d. | The reactant may be
a solid metal. |
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37.
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In a double-replacement reaction, ____.
a. | the reactants are usually a metal and a nonmetal | b. | one of the reactants
is often water | c. | the reactants are generally two ionic compounds in aqueous
solution | d. | energy in the form of heat or light is often produced |
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38.
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Which of the following is the correctly balanced equation for the incomplete
combustion of heptene, C H ?
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39.
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The reaction 2Fe 3Cl 2FeCl is an example of which type of
reaction?
a. | combustion reaction | c. | combination reaction | b. | single-replacement reaction | d. | decomposition
reaction |
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40.
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The equation 2C H OH 9O
6CO 8H O is an
example of which type of reaction?
a. | combustion reaction | c. | double-replacement reaction | b. | single-replacement
reaction | d. | decomposition
reaction |
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41.
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A double-replacement reaction takes place when aqueous cobalt(III) chloride
reacts with aqueous lithium hydroxide. One of the products of this reaction is ____.
a. | Co(OH) | c. | LiCo | b. | Co(OH) | d. | LiCl |
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Short Answer
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42.
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Complete and balance the following equation. Cd(NO ) NH Cl
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43.
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Balance the following equation. C H O CO
H O
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44.
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Balance the following equation. Au O Au O
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45.
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Balance the following equation. Na PO ZnSO Na SO Zn (PO )
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46.
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Complete and balance the following equation. Al Cl
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47.
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Complete and balance the following equation. CH
O CO
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48.
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Complete and balance the following equation. Fe (SO ) Ba(OH)
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49.
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Balance the following equation. Indicate whether combustion is complete or
incomplete. C H O
CO H O
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50.
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Balance the following equation. Indicate whether combustion is complete or
incomplete. 2C H OH
O
CO H O
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