How does the equilibrium constant relate to the concentrations of reactants and products at equilibrium?

• A. It is the ratio of the concentration of products to reactants, each raised to the power of their coefficients.
• B. It is the difference between the concentrations of reactants and products.
• C. It is the sum of the concentrations of reactants and products.
• D. It is the product of the concentrations of reactants and products.

Answer: (A)