Mass number is equal to (10 Points)
O neutrons and electrons
o electrons and protons
O protons and nucleus
protons and neutrons

Evaluate this exponential expression,8. (2 + 3)2 – 42

May someone me with these science questions

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