Gọi \(n_{H_2}=a\left(mol\right)\Rightarrow n_{H_2SO_4}=a\left(mol\right)\)
Bảo toàn khối lượng :
\(m_{hh}+m_{H_2SO_4}=m_{m'}+m_{H_2}\)
\(\Leftrightarrow22,1+98a=74,9+2a\)
\(\Leftrightarrow a=0,55\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,55.22,4=12,32\left(l\right)\)