30. The rate law for the following mechanism is Cl2(g) ⇌ 2 Cl(g) both fast, equilibrium constant K1, Cl(g) + CO(g) ⇌ COCl(g) both fast, equilibrium constant K2 COCl(g) + Cl2(g) → COCl2(g) + Cl(g) k3, slow (A) (B)(C) rate = k3K1K2Cl2 (D) rate = k3CO (E) rate = K1K2k3[CO]