18. Consider the following equilibrium: 2NOCl(g) ⇌ 2NO(g) + Cl2(g) with K = 1.6 x 10-5. 1.00 mole of pure NOCl and 0.967 mole of pure Cl2 are placed in a 1.00-L container. Calculate the equilibrium concentration of Cl2(g). (A) 1.6 x 10-5 M (B) 0.969 M (C) 0.485 M (D) 2.03 x 10-3 M (E) 4.07 x 10-3 M