What are the roles of hydrogen peroxide oxygen hydrogen and catalase in the following reaction?

A substance that influences the reaction but does not participate in the reaction is a

Enzymes are catalysts because they lower the ______________ of a chemical reaction.

A(n) ___ is a substance that speeds up a chemical reaction without being used up in the reaction.

A ___ is a substance that speeds up a chemical reaction without being used up in the reaction.

A substance that accelerates any chemical reaction but is not consumed in the reaction is a _____.

A catalyst is not a product or a reactant of a chemical reaction why not

(a) What is a catalyst? (b) What is the difference between a homogeneous and a heterogeneous catalyst?