6.2 Vocab

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Law of Conservation of Mass

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A principle stating that mass cannot be created or destroyed in a closed system through ordinary chemical reactions or physical transformations.

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Chemical Equation

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A symbolic representation of a chemical reaction where the reactants are given on the left and the products on the right.

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Chemical Reaction

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A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

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Reactant

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A substance that takes part in and undergoes change during a reaction.

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Product

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A substance that is formed as the result of a chemical reaction.

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Coefficient

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A number placed in front of a term in a chemical equation to indicate how many molecules or atoms of each reactant and product are involved in a reaction.

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Subscript

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A number written slightly below and to the right of a chemical symbol in a formula, representing the number of atoms of the element in the compound.

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Balanced Equation

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A chemical equation in which the number of each type of atom is equal on the two sides of the equation.