In a closed container and at constant temperature 0.3 mole of SO2 and 0.2 mole of O2 gas at 750 torr are kept with a catalyst. If at equilibrium 0.2 mole of SO3 is formed the partial pressure of SO2 is ........ torr

Initial moles of SO2 = 0.3Initial moles of O2 = 0.2moles of SO3 at equilibrium = 0.22 mole of SO2 gives 2 moles of SO3_____                          0.2 moles of SO3moles of SO2 reacted = 0.21 mole of O2 gives 2 moles of SO3_____             gives 0.2 moles of SO3