Potassium superoxide (KO2) is a useful source of oxygen employed in breathing equipment. Exhaled air contains moisture, which reacts with KO2 to produce oxygen gas. (The other products are potassium hydroxide and hydrogen peroxide.)
(a) Write an equation for the reaction.
(b) Calculate the pressure at which oxygen gas stored at 20°C would have the same density as the oxygen gas provided by KO2. The density of KO2 at 20°C is 2.15 g/cm3. Comment on your result.