The following reaction shows the equilibrium reaction that occurs when carbon monoxide enters the blood. (Note. The K value uses partial pressures of O₂ and CO in the equilibrium expression.)
Hb(O₂)(aq)+CO(g) ⇋ Hb(CO) (aq) + O₂(g)
What is the ratio of Hb (CO)] to [Hb (O₂) in air that contains 21% O2 and 0.13% CO by volume?