Science Homework Help

Hydrogen sulfide (H2S) decomposes at 1130 C according to the reaction below with an equilibrium constant of Kc= 2.25*10-4. If 2.25 moles of H2S are placed in a 3.00 L, which is then heated to 1130 C what is the concentration of hydrogen gas in molarity at equilibrium

2H2S(g) <—-> 2H2 (g) + S2 (g)