How do you classify this reaction? #8HNO_3 (aq) + 3 Cu (s) + O_2 (g) -> 3Cu(NO_3)_2 (aq) + 4H_2O + 2NO_2 (g)#
This is CLEARLY a redox process, which we represent by invoking electrons as virtual particles........I do not think dioxygen is a reasonable reactant.
Copper is oxidized up to cupric ion,
And cancel out the common reagents......