Recent content by boo_ah_peek

The equilibrium constant Kc for the reaction PCl3(g)+Cl2(g)=PCl5(g) is 49 at 230 C. If 0.70 mol of PCl3 is added to 0.70 mol of Cl2 in a 1.00-L reaction vessel at 230 C, what is the concentration of PCl3 when equilibrium has been established? I know what the answer is but I just don't know how...