Question

Cu2S>Cu2O>Cu>Cu(NO3)2>CuO>Cu>CuCl2>Cu(NO3)2>Cu

Answer 1

2Cu₂S + 3O₂ = 2Cu₂O + 2SO₂'
Cu₂O + H₂ = 2Cu + H₂O (t=250C)
Cu + 4HNO₃(конц) = Cu(NO₃)₂ + 2NO₂ + 2H₂O
2Cu(NO₃)₂ = 2CuO + 4NO₂ + O₂
CuO + C = Cu + CO
Cu + Cl₂ = CuCl₂
CuCl₂ + 2AgNO₃ = Cu(NO₃)₂ + 2AgCl
Cu(NO₃)₂ + Zn= Cu + Zn(NO₃)₂