A quantity of PCl_5 was heated in a 10 dm^3 vessel at 250^@C. At equilibrium, the vessel contains 0.1 mole of PCl_5 and 0.2 mole of Cl_2.The equilibrium constant for the reaction is
A quantity of PCl_5 was heated in a 10 dm^3 vessel at 250^@C. At equilibrium, the vessel contains 0.1 mole of PCl_5 and 0.2 mole of Cl_2.The equilibrium constant for the reaction is