Question

What is a catalyst defined as?

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

Answer 1

I have just done this in chemistry and i think the answer is B. A substance thst speeds up a reaction, and is not used up. Hope this helps:)