In 1973, the composition of Earth's atmosphere was roughly the same as it is today, with oxygen making up about 21% of the air.
In a 5 L volume of air, approximately 20% of it is oxygen. Therefore, 1 L of air would contain about 0.2 L (or 20%) of oxygen. Therefore, in 5 L of air, there would be approximately 1 L of oxygen present.
Oxygen makes up about 21% of the Earth's atmosphere.
The amount of air in an oxygen tank varies depending on its size. A standard medical oxygen cylinder typically holds between 244 and 682 liters of oxygen at a pressure of 2,000 psi.
There is more oxygen in seawater. Seawater contains around 5 to 10 milligrams of oxygen per liter, while the concentration of oxygen in the air is about 210 milligrams per liter. However, the total amount of oxygen in the oceans is much higher due to their vast volume.
Air has more oxygen compared to an equal volume of water. Air is composed of approximately 21% oxygen, while water contains dissolved oxygen, but in much lower concentrations, usually around 5-8 parts per million.
Air is approximately 20% Oxygen.
Oxygen - yes. Air - no. Not much of that around underwater.
The Earth's atmosphere is composed of roughly 21% oxygen. This level of oxygen in the air is ideal for human respiratory needs.
About 20% of the volume of the air in the room is oxygen.
Around 16% of the air you breathe out is oxygen. This percentage decreases from the 21% of oxygen in the air you inhale due to the exchange of gases that occurs during respiration.
A small percent . exhaled air always contains oxygen .
There is about 21% oxygen in the air we breathe regardless of the time of day. The concentration of oxygen remains relatively constant throughout the day.
ideally 21% (20.95%)
Oxygen, of course.
The concentration of oxygen in the air is much much higher than in the water. This make obtaining oxygen much easier and strenuous activity (to a level higher than that is water) possible.
Oxygen keeps animals alive, Nitrogen is not much use.
Approx 180ml