Final answer:
The partial pressure of oxygen on an airplane pressurized to 700 mmHg where air is 21% oxygen is 147 mmHg. This is calculated by multiplying the total pressure by the percent of oxygen in air.
Step-by-step explanation:
The partial pressure of oxygen on the plane can be calculated using the percentage of oxygen in the air and the total pressure inside the airplane. Assuming air is 21% oxygen, the formula to calculate the partial pressure of oxygen (Po₂) is:
Po₂ = total pressure x (percent content of oxygen in air / 100)
For an airplane pressurized to 700 mmHg, the partial pressure of oxygen is calculated by multiplying 700 mmHg by 0.21 (which is the decimal equivalent of 21%):
Po₂ = 700 mmHg x 0.21 = 147 mmHg
Therefore, the partial pressure of oxygen on the plane is 147 mmHg.