Chemistry Reactions, Counting Atoms and Balancing Quiz

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13 Terms

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chemical reaction

one or more elements are changed into one or more different substances

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The Law of Conservation of Mass

matter is never created or destroyed

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reactant

the original substance

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product

the new substance

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3

3CO2 amount of moles (coefficient)

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2

3CO2 amount of atoms (subscript)

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3 moles 15 atoms

3CH4 amount of moles (coefficient) and atoms (subscript)

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1 mole and 7 atoms

Al(OH)3 amount of moles (coefficient) and atoms (subscript)

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synthesis

two or more substances combine to form a new compound

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decomposition

a compound decomposes into two or more simpler substances

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combustion

a substance will combine with oxygen and in the process give off energy in the form of light and heat

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single replacement

one element replaces another element in a compound

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double replacement

two ionic compounds exchange ions in solution to form two new compounds