The equilibrium constant (Kc) for the reaction PC13 (g) + Cl₂ (g) → PC1, (g) equals 49 at 230°C. If 0.319 mol each of phosphorus trichloride and chlorine are added to a 4.90 L reaction vessel, what is the equilibrium composition of the mixture at 230°C? mol PC13 mol Cl₂ mol PC15

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