Commercial scuba divers use tanks filled with a mixture of gases known as Trimix on very long, deep dives. Trimix is composed of 70 percent nitrogen, 10 percent oxygen, and 20 percent helium. The total pressure of Trimix inside a certain tank at the beginning of a dive is 118.4 atm. (a) What is the partial pressure of oxygen in the tank?
(b) Recall that the total pressure of air at sea level is about 1 atm, and that air is 20.9 percent oxygen. How does the partial pressure of oxygen in the tank compare to the partial pressure of oxygen in air?