Question

CuSO4->Cu(OH)2->CuO->Cu->Cu(NO3)2

Answer 1

CuSO4+2NaOH=Cu(OH)2↓+Na2SO4

Cu(OH)2=t=CuO+H2O

CuO+H2=Cu+H2O

Cu+4HNO3(конц.)=Cu(NO3)2+2NO2+2H2O