Объяснение:
H2+S=H2S
Ca+2H2O=Ca(OH)2+H2
2Zn+O2=2ZnO
2H2O=2H2+O2
C3H8+5O2=3CO2+4H2O
PbO+H2=Pb+H2O
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Объяснение:
H2+S=H2S
Ca+2H2O=Ca(OH)2+H2
2Zn+O2=2ZnO
2H2O=2H2+O2
C3H8+5O2=3CO2+4H2O
PbO+H2=Pb+H2O