Which statement about balanced chemical equations is true? O A. The total number of moles of products equals the total number of
moles of reactants.
O B. The mass of the new atoms that are formed equals the mass of
the atoms that made up the reactants.
O c. The total mass of the reactants equals the total mass of the
products.
D. The mass of the products is greater than the mass of the
reactants when the number of moles increases.

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