Phosphorus pentachloride decomposes according to the chemical equation
PCl5 (g) ⇌ PCl3 (g) + Cl2(g) K c = 1.80 at 250 °C.
A 0.162 mol sample of PCl5 (g) is injected into an empty 2.10 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5 (g) and PCl3 (g) at equilibrium.
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