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True or False: By definition, a catalyst must be used up during the chemical reaction it starts .
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True or False: By definition, a catalyst must be used up during the chemical reaction it starts .

User Pereira
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true A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction. Catalysis is the process of adding a catalyst to facilitate a reaction.
User SVSchmidt
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