Ответ:
Na2+S=Na2S
H2+S=H2S
Cu+S+2O2=CuSO4
Cu+2O2=CuO4
2Fe+3Cl2=2FeCl3
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Ответ:
Na2+S=Na2S
H2+S=H2S
Cu+S+2O2=CuSO4
Cu+2O2=CuO4
2Fe+3Cl2=2FeCl3