13.6 Exercise 13

A deep-sea diver should breathe a gas mixture that has the same oxygen partial pressure as at sea level, where dry air contains 20.9% oxygen and has a total pressure of $1 . \text{01} \times \text{10}^{5} \text{ N}/\text{m}^{2}$. (a) What is the partial pressure of oxygen at sea level? (b) If the diver breathes a gas mixture at a pressure of $2 . \text{00} \times \text{10}^{6} \text{ N}/\text{m}^{2}$, what percent oxygen should it be to have the same oxygen partial pressure as at sea level?