Chemical Reactions

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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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Skeleton Equation

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A way of using the formulas to indicate the chemicals that were involved in the chemical reaction.

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Law of Conservation of Mass

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Mass is neither created nor destroyed in a chemical reaction.

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Law of Conservation of Energy

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Energy cannot be created or destroyed, only transformed from one form to another.

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Coefficients

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Numbers placed before the reactants in a chemical equation to balance the equation.

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Chemical Potential Energy

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Energy stored in the chemical bonds of a substance.

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Collision Theory

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Theory that states that chemical reactions can occur when particles collide with sufficient energy and proper orientation.

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Reaction Rate

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The speed at which a chemical reaction proceeds.

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Exothermic

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A reaction that releases energy in the form of heat.