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It is just under 21 %.

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Q: What is the ratio of oxygen in air?
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What is the ratio of oxygen to nitrogen in air?

The ratio is approx 268 to 1000.


How much ratio of nitrogen to oxygen in the air is approximately?

The ratio of nitrogen to oxygen in Earth's atmosphere is approximately 4:1. This means that nitrogen makes up about 78% and oxygen makes up about 21% of the gases in the air.


What is the ratio of oxygen to carbon dioxide in the air?

The ratio of oxygen to carbon dioxide in the air is approximately 21:0.04. This means that oxygen makes up about 21% of the air we breathe, while carbon dioxide is present in much lower concentrations at around 0.04%.


What is the mole ratio of air to methane gas in the cumbustion of methane?

The balanced chemical equation for the combustion of methane is CH4 + 2O2 -> CO2 + 2H2O. This means that the mole ratio of air to methane gas is 2:1, as two moles of oxygen from the air are required to react with one mole of methane gas.


If the air you breathe is 80 nitrogen 20 oxygen what the ratio in a dive cylinder?

In a typical scuba diving cylinder, the air mixture is compressed and stored. The ratio of nitrogen to oxygen in the dive cylinder will be the same as atmospheric air, around 78% nitrogen and 21% oxygen. However, very specialized mixes may be used depending on the dive plan.


What is called the Ratio between oxygen uptake and oxygen usage?

The ratio between oxygen uptake and oxygen usage is called the respiratory exchange ratio (RER). It is a measure of the ratio of carbon dioxide produced to oxygen consumed during metabolism. This ratio can vary depending on the type of fuel being used by the body for energy.


How many times more than oxygen makes up air?

There is: Nitrogen (N2): 78.09% Oxygen (O2): 20.95% in the atmosphere There is ~3.73 times more oxygen than nitrogen in the air and is in a ratio (oxygen to nitrogen) of 39:10 (rounded).


What is the ratio between the oxygen and nitrogen?

The ratio of oxygen to nitrogen in the Earth's atmosphere is approximately 1:4. There is about 21% oxygen and 78% nitrogen in the atmosphere, with the remaining 1% made up of other gases. This balance is important for supporting life on Earth.


How many Time more nitrogen than oxygen make up air?

There is: Nitrogen (N2): 78.09% Oxygen (O2): 20.95% in the atmosphere There is ~3.73 times more oxygen than nitrogen in the air and is in a ratio (oxygen to nitrogen) of 39:10 (rounded).


What does an oxygen sensor do on a Ford Explorer?

The oxygen sensor(s) before the catalytic converter(s) is used to determine the air / fuel ratio of the engine


What do the upstream oxygen sensors do on a 05 mustang?

Upstream oxygen sensors send a signal to the PCM which adjusts the fuel mixture ( air / fuel ratio )


Ratio of nitrogen and oxygen in the air?

80% nitrogen, 20% oxygen however it's really 79% plus some decimals of nitrogen and 21% oxygen and a little moisture. But if the question is only looking for a basic answer, just use the top answer.