#### Answer

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#### Work Step by Step

Since the air we breath is 21% oxygen, this means that the mole fraction of oxygen is .21. We find the partial pressure:
$720 \ mmHg \times .21 = 151 \ mmHg$

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Published by
Cengage Learning

ISBN 10:
1285199049

ISBN 13:
978-1-28519-904-7

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