question 4 of 10\nhow does a catalyst work to make a reaction go more quickly?\na. it raises the temperature…

question 4 of 10\nhow does a catalyst work to make a reaction go more quickly?\na. it raises the temperature of the reaction.\nb. it increases the concentrations of the reactants.\nc. it brings reactant molecules together.\nd. it decreases the number of collisions.

question 4 of 10\nhow does a catalyst work to make a reaction go more quickly?\na. it raises the temperature of the reaction.\nb. it increases the concentrations of the reactants.\nc. it brings reactant molecules together.\nd. it decreases the number of collisions.

Answer

Brief Explanations:

Catalysts speed up chemical reactions by providing an alternative reaction pathway with a lower activation energy. A key part of this is facilitating the coming together of reactant molecules, which increases the frequency of effective collisions. Options A and B describe external changes (temperature, concentration) that are not the action of a catalyst, and option D is incorrect because catalysts increase, not decrease, effective collisions.

Answer:

C. It brings reactant molecules together.