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    Campbell Biology Concepts
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    Exam 42: Circulation and Gas Exchange
  5. Question
    When the Air in a Testing Chamber Is Specially Mixed
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When the Air in a Testing Chamber Is Specially Mixed

Question 25

Question 25

Multiple Choice

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


A) 400 mm Hg.
B) 82 mm Hg.
C) 40 mm Hg.
D) 21 mm Hg.
E) 4 mm Hg.

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