Approximately 21%
21%oxygen
Oxygen(02)=20.947
The Earth's atmosphere is composed of about 21% oxygen. This level is important for supporting life on our planet.
Oxygen makes up about 21% of the air we breathe. The majority of the air is composed of nitrogen (about 78%).
About 21% of the Earth's atmosphere is composed of oxygen.
Air is primarily composed of nitrogen (about 78%) and oxygen (about 21%).
Room air is about 21% oxygen.
About 21% of inspired air is oxygen.
oxygen percentage in air is 20%
Air contains about 19-20% oxygen
Around 21% of the air you breathe is oxygen.
As altitude increases, the percentage of oxygen in the air decreases. This is because the air becomes thinner at higher altitudes, leading to lower oxygen concentrations.