Question

Cu-CuO-Cu(No3)2-CuSO4-Cu(oh)2

Answer 1

2Cu+O2=2CuO
CuO+2HNO3=Cu(NO3)2+H2O
Cu(NO3)2+H2SO4=CuSO4+2HNO3
СuSO4+2KOH
=Cu(OH)2+K2SO4