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A student ran the following reaction in the laboratory at 641 K: CO(g) + Cl2(g) COCl2(g) When she introduced 7.34×10-2 moles of CO(g) and 9.69×10-2 moles of Cl2(g) into a 1.00 liter container, she found the equilibrium concentration of Cl2(g) to be 5.72×10-2 M. Calculate the equilibrium constant, Kc, she obtained for this reaction.