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Answer :
Final answer:
The partial pressure of oxygen in the air at 100 kPa, when the partial pressure of nitrogen is 82 kPa, is 18 kPa. Hence the correct answer is a. 18kPa
Explanation:
To calculate the partial pressure of oxygen in the air at 100 kPa with nitrogen having a partial pressure of 82 kPa, we subtract the nitrogen partial pressure from the total pressure of the air. Since air consists of oxygen and nitrogen primarily, with oxygen at approximately 20.9% and nitrogen at 78.6%, the partial pressures should add up to the total pressure of the air.
Using the formula:
- Partial pressure of oxygen (Po₂) = Total pressure (Ptotal) - Partial pressure of nitrogen (Pn₂)
we get:
Partial pressure of oxygen (Po₂) = 100 kPa - 82 kPa = 18 kPa
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