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Calculate the mass, in kilogram, of pure H2SO4 obtained from 1.000 kg of FeS2 according to the following sequence of equations. The percent yield of each reaction is indicated with the reaction. 4 FeS2 + 11 O2 → 2 Fe2O3 + 8 SO2 95.0% 2 SO2 + O2 → 2 SO3 89.7% SO3 + H2O → H2SO4 94.6%