Oxygen
About 20 percent of the air we breathe consists of oxygen. The Earth's atmosphere is composed of approximately 78 percent nitrogen, 21 percent oxygen, and trace amounts of other gases. This oxygen is essential for human and animal respiration, supporting life by allowing cells to produce energy.
Oxygen
Oxygen
Typically, the air you breathe is comprised of 18 to 21 percent Oxygen.
20% of 20% is 4% (=0.04)
Oxygen
Oxygen
Oxygen is approximately 21% of the air we breathe.
20.95% is oxygen
Oxygen is the second most common/abundant gas in the air that we breathe. Nitrogen is the most abundant gas in the air we breathe. The composition of air is often treated as 79 mole or volume percent N2 and 21 mole or volume percent O2.
In 2006, about 20 percent from natural gas
About 20 percent of the air we breathe consists of oxygen. The Earth's atmosphere is composed of approximately 78 percent nitrogen, 21 percent oxygen, and trace amounts of other gases. This oxygen is essential for human and animal respiration, supporting life by allowing cells to produce energy.
Oxygen is the gas that accounts for about 20 percent of Earth's atmosphere.
Oxygen is the second most common/abundant gas in the air that we breathe. Nitrogen is the most abundant gas in the air we breathe. The composition of air is often treated as 79 mole or volume percent N2 and 21 mole or volume percent O2.
Nitrogen which makes up about 78 percent of the atmosphere.
Oxygen
Carbon dioxide is the gas you breathe out the second most. Oxygen is the gas you breathe out the most.