(b) Sulphur is burned in dry air in a sulphur burner. The gas from a sulphur burner containing 15%,SO2,5%,O2 and 80%,N2 enters a converter after mixing with the secondary air. The gas leaving the catalytic converter has the following analysis: SO2,4.5%,O2,7.5% and N2,88 %. Calculate: (i) The amount of gas in moles. (ii) The amount of gas in weight [5] [5] (iii) The amount of SO2 leaving the catalytic converter in moles. [5] (iv) The percent of SO2 entering the converter that has been [5] oxidized to SO3