Question

1. the activation energy needed for a chemical reaction is determined by its (1 point)

∘ reactant
∘ inhibitor
∘ catalyst
∘ product

Explanation:

The activation energy of a chemical reaction is determined by the reactant. Reactants are the starting substances in a reaction, and their nature (like bond strengths) dictates the energy needed to start the reaction. Catalysts lower activation energy but don't determine the original value; products are formed, and inhibitors slow reactions, not determine activation energy.

Answer:

A. reactant (assuming the first option is "reactant" with a typo, as the text shows "reactant" - like spelling error but contextually, activation energy is determined by reactants' properties)