1. 2 Cu+O2--->2 CuO
2. CuO+2 HCl--->CuCl2+H2O
3. Cu+S--->CuS
4. CuS+2 HCl--->CuCl2+H2S
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1. 2 Cu+O2--->2 CuO
2. CuO+2 HCl--->CuCl2+H2O
3. Cu+S--->CuS
4. CuS+2 HCl--->CuCl2+H2S