Ammonia, nh3, can be made by reacting nitrogen and hydrogen and the equation is n2 + 3h2 --> 2nh3 how many moles of nh3 can be made if 9 moles of h2 react with enough n2? mol

Which statement is true about a catalyst? a: a catalyst decreases the rate of the reaction. b. a catalyst is consumed during a chemical reaction. c. a catalyst lowers the activation energy of a reaction. d. a catalyst increases the reactant concentration during a reaction.