Question

why does decreasing the temperature generally decrease the reaction rate? decreases the concentration of the molecules, which decreases the chance and energy of collisions decreases the number of molecules, which decreases only the chance of collisions decreases the speed of the molecules, which decreases the chance and energy of collisions decreases the energy of the molecules, which decreases only the energy of collisions

Explanation:

Reaction rate depends on molecular collisions. Temperature is related to molecular speed and energy. Lower temperature means slower - moving molecules with less kinetic energy, reducing both collision frequency and energy.

Answer:

Decreases the speed of the molecules, which decreases the chance and energy of collisions