as the exhaled air contains about 16.4% of oxygen and only about 4.4% of carbon dioxide then why we say that the exhaled air is rich in carbon dioxide?

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Solution

Exhaled air contains 4% to 5% by volume more carbon dioxide and 4% to 5% by volume less oxygen than was inhaled. So in that comparison it is said exhaled air is rich in carbon dioxide.

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What is the percentage of carbon dioxide in inhaled and exhaled air? [2 MARKS]

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K O_{2}

4 K O_{2} (s) + 2 H_{2} O (g) 4 C O_{2} (g) \to 4 K H C O_{3} (s) + 3 O_{2} (g)

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