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When the air in a testing chamber is specially mixed so that its oxygen content is 10% and its overall air pressure is 400 mm Hg, then PO2 is ________. When the air in a testing chamber is specially mixed so that its oxygen content is 10% and its overall air pressure is 400 mm Hg, then PO2 is ________. 400 mm Hg 82 mm Hg 4 mm Hg 40 mm Hg

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princessesther2011

Answer:

PO2 is 40 mmHg

Explanation:

PO2 is the partial pressure of oxygen in the testing chamber

Total air pressure = 400 mmHg

% by weight of oxygen = 10%

Partial pressure of oxygen = % by weight of oxygen × total air pressure = 10% × 400 mmHg = 0.1 × 400 mmHg = 40 mmHg