Q:

If the composition of air is 20 percent oxygen with an atmospheric pressure of 700 mmHg, what would the partial pressure of oxygen be?

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If the composition of air is 20 percent oxygen with an atmospheric pressure of 700 mmHg, what would the partial pressure of oxygen be?


  1. 14 mmHg.
  2. 20 mmHg.
  3. 140 mmHg.
  4. 700 mmHg.

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C: 10 % of 700 mmHg is 70, so 20 % is 140 mmHg

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