Question

question 18 (1 point)
a(n)_____ is any substance that increases the rate or speed of a chemical reaction without being changed or consumed in the reaction.
reagent
indicator
reactant
catalyst
substrate

Explanation:

A catalyst speeds up a chemical reaction without being consumed. A reagent is a substance used to cause a chemical reaction. An indicator shows a change in a solution. A reactant is consumed in a reaction. A substrate is a substance acted upon by an enzyme. So the answer is catalyst.

Answer:

catalyst