GKFix MCQ Question

For the reaction 2SO₂(g) + O₂(g) ⇌ 2SO₃(g), what does the equilibrium constant Kc represent?

• A. Sum of all concentrations
• B. Difference between product and reactant concentrations
• C. Ratio of product concentrations to reactant concentrations raised to their stoichiometric coefficients
• D. Rate of forward reaction divided by reverse rate