Not as part of combustion. That was just general chemistry. In combustion we learned the specific chemicle reaction of combustion, by that point we'd moved well past drawing little circles and were just dealing with the molecules by symbol. We were done with Bohr, thank God.
Oh, you went from an over-simplified model to an over-over-simplified model to do your calculations. Well done. you are aware that the (symbol) model is inaccurate due to not properly accounting for gravitational forces, don't you?