Consider the following equilibrium: 2NOCl(g) 2NO(g) + Cl2(g) with K = 1.6 x 10-5 1.00 mole of pure NOCl and 1.00 mole of pure Cl2 are placed in a 1.00-L container. If x moles of NOCl react, what is the equilibrium concentration of Cl2? Why is the answer C) 1 + x/2