what happens when oxygen burns in the presence of oxygen ?
Just about everything burns in the presence of oxygen, but the proper view is everything combines with oxygen, that is what combustion is about. the remains of combustion are usually made up of oxides. if you test them,(ashes, soot, etc...)you will see, combustion is just a chemical reaction,(exothermic reactions give off heat.)with enough heat to start a reaction, anything will burn.