What is a mole? a)The SI unit for measuring the mass of a sample equal to 6.02 x 1023 grams

b)A unit of counting equal to 6.02 x 10^23 objects

c)The mass of one atom of carbon-12, and no other element

d)The mass of one atom of any element

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