You were never taught about electron bonding, valent and co-valent electrons, or reaction tables to determine how to determine which chemicals would react with which? That is the basics of combustion.
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.