nFe = 11.2/56 = 0.2 (mol)
Fe + S -to-> FeS
0.2________0.2
FeS + H2SO4 => FeSO4 + H2S
0.2____________________0.2
VH2S = 0.2*22.4 = 4.48 (l)
\(Fe+S\underrightarrow{t^o}FeS\)
\(n_{Fe}=\dfrac{11,2}{56}=0,2mol\)
\(FeS+H_2SO_4\rightarrow FeSO_4+H_2S\)
\(\Rightarrow V_{H_2S}=0,2.22,4=4,48l\)