Add the equation of possible reactions, show the transition of electrons Au + O2 = Hg + CuCl2

Add the equation of possible reactions, show the transition of electrons Au + O2 = Hg + CuCl2 = Ba + H2O = Ag + HNO3 = Fe + H2O = Al + FeSO4 =

We compose the reaction equations:
2Au + 3O2 = 2Au2O3 – oxidation reaction;
Hg + CuCL2 = HgCL2 + Cu – substitution reaction;
Ba + 2 H2O = Ba (OH) 2 + H2 – redox reaction;
Ba – 2e = Ba 2+ | 1;
2H + + 2e = 2H | 1;
Ag + 2HNO3 (conc.) = AgNO3 + NO2 + H2O;
Ag –e = Ag + | 1;
N5 + + e = N4 + | 1;
3Fe + 4 H2O = Fe3O4 + 4H2O – the reaction takes place in water vapor, the type of reaction is redox;
2Al + 3 FeSO4 = Fe + Al2 (SO4) 3 – substitution reaction.
Metals in chemical reactions exhibit the properties of reducing agents.