8. Calculate the consumption of pyrites containing 35% S per 1 ton of H2SO4, if the loss of S and SO2 in the production of sulfuric acid is 0.5%, and the degree of absorption is 98%.
4FeS2 + 11O2 = 2Fe2O3 + 8SO2
2SO2 + O2 →2SO3
SO3 + H2O = H2SO4

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