The composition of air is usually sated as a dry composition (without water vapour). About 21% is oxygen. The rest is mostly Nitrogen (78%) and Argon (1%). Carbon Dioxide at 300ppm is the next largest with other gases at trace amounts
Approximately 21% of Earth's atmosphere is oxygen.
The percent of oxygen in Earth's air is about 20%.
21%
21%
Population: Werewolves: 15 percent of earths population Vampires: 45.2 percent of the earths population Humans: 2 percent of the earths population wookies: 1 percent of the earths population witches and warlocks: 5.8 percent of earths population Actual real animals (you know normal stuff): 31 percent of the earths population
Approximately 21% of the air is oxygen, which we use for breathing. The remaining 78% is nitrogen, which is mainly inert and not used for respiration.
A face mask typically provides around 21% of oxygen, which is the same concentration as the air we normally breathe.
Oxygen makes up about 65% of the weight of a typical animal because water, which animals are mostly made of, is about 89% oxygen.
An oxygen concentrator works by pulling in air, removing nitrogen through a filtration process, and delivering concentrated oxygen to the user through a nasal cannula or mask. The device uses a molecular sieve bed to separate oxygen from nitrogen in the air, providing a higher concentration of oxygen for people with breathing difficulties.
21% of the air is oxygen
97%
45 percent of the earths oxygen is produced by our oceans
About 21% of air is oxygen.
oxygen
The Earth's grass produce 20 to 30 percent oxygen. The other 70 to 80 percent of oxygen is produced by marine plants.
nitrogen
The Crust has the most oxygen in it
nitrogen and oxygen
21 percent
1/120 or about 0.8%.
Oxygen.