Question

if the mineral pyrite,FeS2 is heated strongly in air,iron oxide and sulphur dioxide are produced what mass of iron oxide and sulphur dioxide could be made by heating 1 tonne pf an ore which contains 50% by mass of pyrite? 4FeS2+11O2----2Fe2O3+8SO2

Answer 1

if the mineral pyrite, FeS2 is heated strongly in air, iron oxide and sulphur dioxide are produced what mass of iron oxide and sulphur dioxide could be made by heating 1 tonne pf an ore which contains 50% by mass of pyrite? 4FeS2+11O2---2Fe2O3+8SO2

$$m(FeS_2) = 10^6 * 0.5 = 0.5 * 10^6 g$$ $$\nu(FeS_2) = \frac{0.5 * 10^6}{56 + 32 + 32} = 4.2 * 10^3 mol$$ $$\nu(Fe_3O_4) = 2.1 * 10^3 mol$$ $$m(Fe_3O_4) = 2.1 * 10^3 * 232 = 487.2 * 10^3 g = 487.2 kg$$ $$\nu(SO_2) = 8.4 * 10^3 mol$$ $$m(SO_2) = 8.4 * 10^3 * 64 = 537.6 * 10^3 g = 537.6 kg$$ $$m(Fe_3O_4) = 487.2 kg$$ $$m(SO_2) = 537.6 kg$$