Н2+Сl2=2HCl
H2+2K=2KH
H2+Al2O3 - нет такой реакции
HgO + H2 = Hg + H2O
H2+WO3=W+3H2O
2) 2HCl=H2+Cl2
H2 + S = H2S
O3 + H2S = SO2 + H2O
3) 8r xr
2H2+O2=2H2O
4r 36
x=(8*36)/4=72r
Н2+Сl2=2HCl
H2+2K=2KH
H2+Al2O3 - нет такой реакции
HgO + H2 = Hg + H2O
H2+WO3=W+3H2O
2) 2HCl=H2+Cl2
H2 + S = H2S
O3 + H2S = SO2 + H2O
3) 8r xr
2H2+O2=2H2O
4r 36
x=(8*36)/4=72r