What distinguishes a catalyst from other substances involved in a chemical reaction?Select one:a.A catalyst remains unchanged after the reaction.b.A catalyst is an intermediate in the reaction.c.A catalyst is produced during the reaction.d.A catalyst is consumed during the reaction.

What effect does a catalyst have on a reaction?A.A catalyst increases the concentrations of products.B.A catalyst contributes energy to a reaction.C.A catalyst speeds up the rate of a reaction.D.A catalyst makes it possible for a reaction to happen.

Catalysts are _____________________________changed during chemical reactions.

Transition metals often make good catalysts.Identify the best definition of a catalyst.A catalyst is a substance that speeds up the rate of the reaction without being used up or being changed.A catalyst is a substance that affects the rate of reaction.A catalyst is a substance that speeds up the rate of the reaction and is used up.A catalyst is a substance that slows down the rate of the reaction, this gives the reaction more time to occur.

A catalyst is added to a reaction. Which of the following statements best describes the effect that a catalyst has on a reaction? Group of answer choicesThe catalyst gives the reactants more kinetic energyThe reaction rate is decreasedThe activation energy of the reaction is increasedThe activation energy of the reaction is decreased

Which statement best describes what happens during a chemical reaction?A.Products change into reactants.B.Reactants change into new reactants.C.Reactants change into products.D.Products change into new products.