The Partial Pressure of Oxygen in Dry Air (21% O₂)

question 6

Multiple Choice

The partial pressure of oxygen in dry air (21% O₂) inhaled by divers at a depth of 100 feet below sea level (4 atmospheres) is approximately:

• A)160 mm Hg
• B)320 mm Hg
• C)640 mm Hg
• D)1,280 mm Hg

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