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1.
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well defined chemical change
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Chemical reactions
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2.
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starting material
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reactants
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3.
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ending material
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products
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4.
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matter can't be created nor destroyed
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Law of Conservation of Mass
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5.
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simple method for describing a chemical formulas and symbols
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chemical equation
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6.
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Number in front of a chemical formula
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coefficient
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7.
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small number in the chemical formula
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subscripts
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8.
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two or more substances combine to form one substance
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Synthesis Reaction
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9.
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one substance breaks apart to form two or more substances
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Decomposition Reaction
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10.
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one element replaces another element in a compound
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single replacement reaction
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11.
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one element in a compound replaces another element in a compoud
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double replacement reaction
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12.
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When does chemical reaction occur?
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-temp change
-color change
-odor
-gas emission (bubbles)
-emission of light
-formation of precipitate
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13.
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What are the types of energy?
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Heat, light, sound, electricity
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14.
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energy is released "Exit"
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Exothermic Reaction
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15.
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energy is absorbed "Enter"
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Endothermic Reaction
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16.
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substances that speed up chemical reactions
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Catalyst
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17.
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substances that slow down a CR
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Inhibitors
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18.
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The arrow in a chemical equation means "produces" or "
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yields
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19.
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means "dissolved in water"
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aqueous
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20.
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combination of chemical symbols used to represent a compound
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formula
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21.
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letters used to represent elements
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symbols
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22.
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CFC stands for this
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ChloroFluoroCarbon
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23.
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element represented by the first C in CFC
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Chlorine
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24.
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element represented by the F in CFC
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Fluorine
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25.
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element represented by the second C in CFC
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Carbon
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26.
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O3 means
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Ozone
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27.
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type of radiation stopped by the ozone layer
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ultraviolet
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28.
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The formula for this compound is CLO
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chlorine monoxide
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29.
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In a _____ displacement reaction, water, a gas, or a precipitate is fomred when two ionic compounds are dissolved in a solution
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double
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30.
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If water is broken down to form hydrogen gas and oxygen has, a ______ reaction has taken place
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Decomposition
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31.
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A double displacement reaction involves _____ compounds
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ionic
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32.
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In a _______ reaction, two or more substances combine to form another substance.
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Synthesis
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33.
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insoluble solids
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procipitates
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34.
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neutral subatmoic particle
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neutron
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