3. In the picture, a girl with a weight of 540 N is balancing on force exerted by the ground on her front wheel is 200 N, h
back wheel?

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products