what percentage air use in respiration
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Inhaled air is by volume 78.08% nitrogen, 20.95% oxygen and small amounts include argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount.
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about 78 percent of nitrogen gas is present and 20 percent is oxygen so i think 60 percent of air is used in respiraion
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