1) H2+Cl2=2HCl
2) CuO+H2=Cu+H2O
3)K2SO4+4H2=K2S+4H2O
4)3H2+N2=2NH3
5)2H2+O2=2H2O
6)Fe2O3+3H2=2Fe+3H2O
7)H2+S=H2S
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Answers & Comments
1) H2+Cl2=2HCl
2) CuO+H2=Cu+H2O
3)K2SO4+4H2=K2S+4H2O
4)3H2+N2=2NH3
5)2H2+O2=2H2O
6)Fe2O3+3H2=2Fe+3H2O
7)H2+S=H2S