GEOLOGY

Detailed explanation-1: -As of 2023, by mole fraction (i.e., by number of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

Detailed explanation-2: -Air is mostly gas The air in Earth’s atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen.

Detailed explanation-3: -The percentage of nitrogen in the air is 78%. Oxygen occupies 21% and argon occupies 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.

Detailed explanation-4: -Air contains 79% N2 and 21% O2 by volume.

Detailed explanation-5: -Atmosphere is a layer of gasses that surrounds the earth. It is made up of 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide and a very small percentage of with water vapor.