Based on oxidation number consideration, explain why carbon monoxide is a flammable but carbon dioxide is not

Carbon in carbon monoxide has oxidation number +2 and can be oxidized to oxidation number +4 (carbon(IV) oxide) in reaction with oxygen:
2CO + O₂ → 2CO₂.
Carbon has maximal oxidation number in carbon(IV) oxide and cannot be more oxidized (increase of oxidation number), carbon with oxydation number +4 cannot lose electrons to molecule of oxygen.

Acovalent bond is formed between the two hydrogen bonds

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .