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the percentage of oxygen in the atmosphere today is about 20.95%. Or... if you round it you get the most common answer of 21%.

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How much percent of oxygen gas is in the atmosphere?

20.946% by volum.


Is there oxygen on Mars' atmosphere?

Yes, there is oxygen in the atmosphere of Mars, but it is present in very low concentrations, about 0.13%. This is much lower compared to Earth's atmosphere, which is around 21% oxygen.


How much oxygen is present in an oxygen cylinder then as a percent?

The atmosphere consists of about 20%, Nitrogen being the main component at over 70%


How much oxygen in the air percentage?

Oxygen makes up about 21% of the Earth's atmosphere.


How much oxygen is present in air?

21% Oxygen, 78% Nitrogen, 1% other gasses in out atmosphere.


How would life be different if there was 80 percent oxygen and 20 percent nitrogen?

The atmosphere would be much more volatile.


Is there oxygen above the clouds?

Yes, there is oxygen present above the clouds in the Earth's atmosphere. The oxygen concentration gradually decreases with altitude, but it is still available for breathing.


How much percent does oxygen have by air?

Oxygen makes up about 21% of the Earth's atmosphere. Nitrogen is the most abundant component, making up approximately 78%.


What percent of oxygen to much to support life?

The percent of oxygen is 27. this increases the natural percent of 21 by 6 percent causing living organisms to have too much oxygen.


What component of the earths atmosphere exists as a result of photosynthesis?

Oxygen is the component of the Earth's atmosphere that exists as a result of photosynthesis. During photosynthesis, plants and other photosynthetic organisms release oxygen as a byproduct. This process helps to replenish and maintain the oxygen levels in the atmosphere, supporting aerobic life forms.


What takes up 1 percent of the earths atmasphere?

Assorted gases such as argon, the rest of the atmosphere is pretty much just Oxygen and Nitrogen.


How much oxygen does the Amazon produce yearly?

0.01 percent of the worlds oxygen is from the amazon