Earth's atmosphere is about 21% oxygen by volume (for dry air).
The approximate mole fraction of nitrogen in the atmosphere is about 0.7808, and the approximate mole fraction of oxygen is about 0.2095. When combined, the mole fraction of nitrogen and oxygen in the atmosphere is approximately 0.9903.
Oxygen makes up about 21% of the Earth's atmosphere.
The atmosphere is composed of approximately 21% oxygen.
The percentage of oxygen in the atmosphere is 20.75%. The atmosphere has many other elements that we breathe in besides oxygen. Oxygen needs to be present for life on earth.
Oxygen makes up about 20.95% of the Earth's atmosphere by weight.
The approximate percentage by volume of oxygen in Earth's atmosphere at location 2 is around 21%.
The two main atmospheric gases are nitrogen and oxygen. The approximate percentage for nitrogen is 78% and oxygen's approximate percentage is 21%.
The two main atmospheric gases are nitrogen and oxygen. The approximate percentage for nitrogen is 78% and oxygen's approximate percentage is 21%.
The approximate percentage of oxygen in Earth's lower atmosphere is around 21% by volume.
The approximate mole fraction of nitrogen in the atmosphere is about 0.7808, and the approximate mole fraction of oxygen is about 0.2095. When combined, the mole fraction of nitrogen and oxygen in the atmosphere is approximately 0.9903.
The approximate percent of oxygen in Earth's lower atmosphere is around 20.95% by volume.
The percentage of oxygen in the Earth's atmosphere by mass is approximately 21.
Oxygen makes up about 21% of the Earth's atmosphere.
About 21% of the Earth's atmosphere is composed of oxygen.
The most abundant is nitrogen at 78% followed by oxygen at 21%
Nitrogen ~ 78% Oxygen ~ 21% CO2(and other gasses) ~ 1%
About 21 of the Earth's atmosphere is made up of oxygen.