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15 Cards in this Set
- Front
- Back
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Chemical Reaction |
the process in which atoms are rearranged to produce new substances |
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Chemical Formula |
uses chemical symbols and numbers to represent a given substance |
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Chemical Equation |
an expression that uses symbols to show the relationship between the starting substances and the substances that are produced by a chemical reaction |
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Reactants |
the substances that participate in a chemical reaction |
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Products |
the substances formed in a reaction |
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yield sign |
an arrow that points from reactants to products |
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Law of Conservation of mass |
states that matter is neither created nor destroyed in ordinary physical and chemical changes |
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coefficient |
a number that is placed in front of a chemical formula |
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endothermic reactions |
a chemical reaction that requires an input of energy |
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exothermic reactions |
A chemical reaction in which energy is released to the surroundings |
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law of conservation of energy |
states that energy cannot be created or destroyed |
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concentration |
at higher concentrations, there are more reactants in a given volume |
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Surface Area |
The reaction rate increases when more reactant particles are exposed to one another |
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Temperature |
Reactants usually occur faster at higher temperatures |
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Catalysts |
a substance that changes the rate of a chemical reaction without being used up or changed very much |
