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What is a catalyst defined as? *

A. a substance that speeds up a reaction, and is completely used up
B. a substance that slows down a reaction, and is completely used up
C. a substance that speeds up a reaction, and is not used up

User Espen
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1 Answer

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You may think of a catalyst as something that starts a reaction, but you could also define it as C. a substance that speeds up a reaction, and is not used up.
User Mark F Guerra
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