2>
3Fe+2O2-to->Fe3O4
0,1---0,067
2FeS+7\2O2-to->Fe2O3+2SO2
0,1--------0,175
=>nO2=0,067+0,175=0,242mol
Fe+S-to>FeS
nFe=5,6\56=0,1 mol
nS=1,6\32=0,05 mol
=>Fe dư
FeS+H2SO4->FeSO4+H2S
0,05------------------------0,05
Fe+H2SO4->FeSO4+H2
0,05---------------------0,05
=>Vhhk=0,1.22,4=2,24l
=>%VH2S=0,05.22,4\2,24.100=50%
=>%VH2=50%