If a reaction involves gases and the pressure is decreased, how will the equilibrium change? a. towards the side with the fewest molecules. b. it will not be affected. c. towards the products. d. towards the side with the most molecules.

Towards the side with the most molecules.

Explanation:

According to Le Chatelier’s Principle when stress is applied to a system in equilibrium, the equilibrium will shift in such a way to minimize the effect of the applied stress.  In a reaction involving gases when pressure of the gas is decreased there are fewer gas molecules so to compensate for this the equilibrium will shift towards more moles of the gas or towards the side with the most molecules.

A towards the sode with the fewest molecules