phsophorous trichloride and phosphorous pentachloride equilibrate in the presence of molecular chlorine according to

PCl3 (g) +Cl2 (g)->PCl5 (g) Kc = 2.01 at 500k

If a 1.000L reaction vessel is charged with .300 mol of PCl5(g) and allowed to equilibrate at this temperature, what would be the partical pressure of PCl5(g)