Phosphorus pentachloride decomposes according to the chemical equation PCl5(g)−⇀↽−PCl3(g)+Cl2(g)Kc=1.80 at 250 ∘C A 0.165 mol sample of PCl5(g) is injected into an empty 2.55 L reaction vessel held at 250 ∘C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.

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