Question

CuO-Cu-CuCl(2)-Cu(NO3)-Cu-Cu)

Answer 1

CuO+H2=Cu+H2O

Cu+Cl2=CuCl2

CuCl2+2HNO3=Cu(NO3)2+2HCl

2Cu(NO3)2+2H2O=2Cu+4HNO3+O2

2Cu+O2=2CuO