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the law that states mass cannot be created or destroyed in ordinary chemical and physical changes.

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a representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products.

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is a shorthand way to use chemical symbols and numbers to represent a substance.

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the substance that forms in a chemical reaction.

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a substance or molecule that participates in a chemical reaction.

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is a solid substance that is formed in a solution

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Is a process in which one or more substances change to make one or more new substances.