A sample of so3so3 is introduced into an evacuated sealed container and heated to 600 kk. The following equilibrium is established: 2so3(g)⇌2so2(g) o2(g)2so3(g)⇌2so2(g) o2(g) the total pressure in the system is 3. 0 atmatm , and the mole fraction of o2o2 is 0. 12