Объяснение:
ZnO+H2=Zn+H2O
Cr2O3+3H2=2Cr+3H2O
Ag2O+H2=2Ag+H2O
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Объяснение:
ZnO+H2=Zn+H2O
Cr2O3+3H2=2Cr+3H2O
Ag2O+H2=2Ag+H2O