Ответ:
Fe3O4+4H2=3Fe+4H2O
3MnO2+4Al=2Al2O3+3Mn
Ca+2HCl=CaCl2+H2
2NO+O2=2NO2
2H2S+O2=2S+2H2O
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Ответ:
Fe3O4+4H2=3Fe+4H2O
3MnO2+4Al=2Al2O3+3Mn
Ca+2HCl=CaCl2+H2
2NO+O2=2NO2
2H2S+O2=2S+2H2O