Please help!!
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g)↽−−⇀PCl3(g)+Cl2(g)c=1.80 at 250 ∘C A 0.2836 mol sample of PCl5(g) is injected into an empty 3.65 L reaction vessel held at 250 ∘C. Calculate the concentrations of PCl5(g) and PCl3(g) at equilibrium.
