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Question 4 : A simplified process for the production of SO3 to be used in the manufacture of sulfuric acid is illustrated in Figure 1. Sulfur is burned with 120% excess air in the burner, but for the reaction S + O2 —> SO2, only 80% conversion of the S to SO2 is achieved in the burner. In the converter, the conversion of SO2 to SO3 is 90% complete. Calculate the kilograms of air required per 100 kg of sulphur burned, and the concentrations of the components in the exit gas from the burner and from the converter in mole fractions. Note 1: MW information (S: 32 g/mol; O2: 32 g/mol; Air: 29 g/mol)