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World's population in 2009?
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
What percentage of the air is used for breathing?
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.
What percent of oxygen does a face mask supply?
A face mask typically provides around 21% of oxygen, which is the same concentration as the air we normally breathe.
What percent of the weight of a typical animal is oxygen?
Oxygen makes up about 65% of the weight of a typical animal because water, which animals are mostly made of, is about 89% oxygen.
How does the oxygen concentrator work?
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.
Gas that makes up 20 percent of total air volume in earths atmosphere?
Oxygen is the gas that accounts for about 20 percent of Earth's atmosphere.
What percent of earths atmosphere is oxygen?
97%
What is the percent of oxygen in dry air?
The percent of oxygen in dry air is approximately 21%.
Which of the earths layers has the most air?
The Crust has the most oxygen in it
What is Earths dry air is made up of?
nitrogen and oxygen
What makes up 21 percent of the air by volume?
Oxygen makes up 21 percent of the air by volume.
What is the approximate percent of oxygen by volume present in earths lower atmosphere?
The approximate percent of oxygen in Earth's lower atmosphere is around 20.95% by volume.
What is the percentage of oxygen in earths air?
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
What in the air that has 20 percent?
oxygen
What is oxygen most commonly found in?
Oxygen is most commonly found in the air of Earths atmosphere.
What makes up 21 percent of the air?
oxygen! There is 21 percent oxygen in inspired ( the stuff you breath in) air and 13 percent in expired(the stuff you breath out)
Approximately 20 percent of the earths atmosphere is made up of which gas?
Approximately 20 percent of the Earth's atmosphere is made up of oxygen.
