What must happen before a chemical reaction can begin? A) The activation energy must be exceeded. B) The activation energy must be reached. C) The concentrations of products and reactants must be equal. D) The concentration of reactant molecules must be reduced.
I believe the correct response is A. The activation energy must be exceeded.
energy must be absorbed by the reactants Before a chemical reaction can start . activation energy. is the amount that must be absorbed to start the reaction