The carbon dioxide content in the air that we exhale is about?
Correct answer: A. 4%
- A. 4%
- B. 9%
- C. 15%
- D. 16%Chemistry
Explanation
Exhaled air contains about 4% carbon dioxide because body cells produce CO2 during respiration and the blood carries it to the lungs. Inhaled air contains only about 0.04% CO2, so exhalation greatly increases its proportion.
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