Which statement best describes a mole?
it is used mainly for writing chemical formulas.
it is used for chemical equations that have reversible reactions.
it is used for directly comparing the amounts of substances.
it is used mainly for dealing with fluid substances.

How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next