Atmospheric Pressure at Sea Level Is Equal to a Column

question 38

Multiple Choice

Atmospheric pressure at sea level is equal to a column of 760 mm Hg. Oxygen makes up 21 percent of the atmosphere by volume. The partial pressure of oxygen (PO2) in such conditions is ________.

• A) 160 mm Hg
• B) 16 mm Hg
• C) 120/75
• D) 21/760
• E) 760/21

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