Ответ:
a)2H2S+O2=S+2H2O
б)2Cu+O2=2CuO
в)2H2O=2H2+O2
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Ответ:
a)2H2S+O2=S+2H2O
б)2Cu+O2=2CuO
в)2H2O=2H2+O2