posted by J .
Phosphorus pentachloride decomposes according to the chemical equation
PCl5(g) <-> PCl3(g)+Cl2(g)
Kc=1.80 at 250 degrees Celsius
A 0.222 mol sample of PCl5(g) is injected into an empty 3.25 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.