Explanation:
C(s) + O₂(g) ⇌ CO₂(g)
The equilibrium constant expression is always of the form
We do not include solids in the expression. That automatically eliminates options A and C.
The products are the substances on the right of the equilibrium arrows and the reactants are on the left. Â
That eliminates Option D, which has the reactant in the numerator.
The equilibrium constant expression is