Air contain ------ percent of carbon dioxide.
Air contain 0.03% percent of carbon dioxide.
Carbon dioxide is prepared by complete combustion of carbon and carbon-containing fuels in _________ of air.
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?
With the help of an experiment prove that exhaled air contains carbon dioxide.