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The equilibrium constant Kc for the reaction PCl3(g) + Cl2 (g) <-----> PlCl5(g) equals 49 at...

The equilibrium constant Kc for the reaction

PCl3(g) + Cl2 (g) <-----> PlCl5(g) equals 49 at 230oC. If 0.400 mol each of phosphorous tri chloride and chlorine are added to 4.0-L reaction vessel, what is the equilibrium composition of the mixture at 230oC?

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