A. It is the ratio of the concentrations of products to the concentrations of reactants.
Explanation:
The equilibrium constant of a chemical reaction is the ratio of the concentration of products to the concentration of reactants.
This equilibrium constant can be expressed in many different formats.
For any system, the molar concentration of all the species on the right side are related to the molar concentrations of those on the left side by the equilibrium constant.
The equilibrium constant is a constant at a given temperature and it is temperature dependent.
The derivation of the equilibrium constant is based on the law of mass action.
It states that "the rate of a chemical reaction is proportional to the product of the concentration of the reacting substances. "
