Question

how do we prove that a breath content carbon dioxide.​

Answer 1

Answer:

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.

Explanation:

The carbon dioxide produced is then removed from the body by dissolution in the blood and through binding with hemoglobin to be transported to the lungs, where it's exhaled out from the nose and mouth. It's common knowledge that we breathe in oxygen and breathe out carbon dioxide.

Answer 2

Answer:

If there is little bit of carbon dioxide in our body then our life is possible. But in our body there is large amount of oxygen which help us to live our life on Earth.