First Aid & CPR Practice · Question
Which oxygen percentage is approximately delivered by rescuer exhaled-air breaths?
Exhaled air contains roughly 16% oxygen — enough to support life during CPR.
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Question: Which oxygen percentage is approximately delivered by rescuer exhaled-air breaths?
Answer options:
- ~5% ✅ ~16%
- ~50%
- ~100%
Correct answer: ~16%
Explanation: Exhaled air contains roughly 16% oxygen — enough to support life during CPR.
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