The smallest amount of energy molecules need to stick together and react is called
a. kinetic energy
b. reaction energy
c. potential energy
d. activation energy

D. activation energy

Explanation:

In a chemical reaction you add heat to increase the kinetic energy of molecules up to a point where the chemical bonds can be broken and from there formation of other bonds will create the product compounds. The energy need to do this is called the activation energy.

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

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