A catalyst speeds up a chemical reaction as a result of which of the following?

it decreases the activation energy of the reaction
it increases the number of collisions between reacting molecules
it makes the reaction more endothermic
it makes the reaction more exothermic

Answer:
Decreases activation energy
it decreases the activation energy of the rxn...
it decreases the activation energy of the reaction

this means that more of the collisions that occur react due to a lower activation energy
it makes the reaction more exothermic
it decreases the activativation energy of the reaction.The activation energy refers to the minimum amount of energy required by the reactants to initiate a reaction. so if this energy is reduced, the particles will collide faster and form products.

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