At high altitudes, the pilots feel uncomfortable breathing because the partial pressure of oxygen is lower than:
Correct answer: B. 159 torr
- A. 16 torr
- B. 159 torr
- C. 158 torr
- D. 157 torr
Explanation
Option B is correct as group level partial pressure effect oxygen is "159 torr". Any less than that causes discomfort in breathing.
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About Standard Temperature and Pressure
Standard temperature and pressure provide reference conditions for gas calculations: 0°C or 273 K and, in the usual school convention, 1 atm pressure. Questions use these conditions to relate pressure, volume, temperature and amount of gas, including the molar volume of an ideal gas, about 22.4 dm³.
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