Phosphorus pentachloride is formed when phosphorus trichloride and chlorine react according to the following reaction. PCI3(g)+ Cl2(g) = PCl5(g) The equilibrium constant for the reaction is Kc, = 37.5 at 145 °C. If 0.222 mol of phosphorus trichloride is added to 0.750 mol of chlorine in a 1.69 - L reaction vessel and allowed to react at this temperature, what is the equilibrium concentration (in mol/L) of phosphorus pentachloride? Report your answer to THREE significant figures.

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