Adding a catalyst to a reaction would increase which quantity?
a. grams of product produced in an hour
b. grams of product at the end of the reaction
c. concentration of product at the end of the reaction
d. concentration of reactants at the end of the reaction

A. grams of product produced in an hour

Explanation:

Catalysts are substances that speed up chemical reactions. They do so by lowering the activation energy of the reactants, minimum energy required to start a chemical reaction.Therefore, catalysts speed up the rate of reaction by lowering the activation energy of the reactants. This means catalysts will have no effect on the concentration of products or reactants and therefore the yield remains the same.

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C. definite shape, definite volume. that is a solid.