Question

increasing the concentration and increasing the temperature both increase reaction rates based on which physical phenomenon?
increasing the frequency of molecular collisions
decreasing the activation energy
increasing the behavior of inhibitors
decreasing the speed of phase change

Explanation:

Increasing concentration means more molecules are present, leading to more frequent collisions. Increasing temperature makes molecules move faster, also increasing collision frequency. Higher - frequency collisions increase the likelihood of successful reactions and thus reaction rates. Activation energy is affected by catalysts, not concentration or temperature directly. Inhibitors slow reactions, and phase - change speed is not related to the basic effect of concentration and temperature on reaction rates.

Answer:

Increasing the frequency of molecular collisions