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# Does oxygen make up 40 percent of the air?

Updated: 4/28/2022

Wiki User

11y ago

No , it makes up 20.9% of air , almost 21%

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11y ago

Anonymous

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Q: Does oxygen make up 40 percent of the air?
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40 percent

3.5

S2o3

### What organ in the human body uses 40 percent of the oxygen in your blood?

The brain consumes 40% of the oxygen in your blood.

320.0 mm Hg

no

### What does altitude do to the air pressure?

makes 40% oxygen than lower altitude

15% + 25% = 40%

### How much liquid to add to make 40 percent to 35 percent?

=0.142857.. of the original volume.

### What is the empirical formula of a compound that is 4 percent sulfur and 6 percent oxygen by weight?

We can't tell. What's the other 90 percent? If you meant 40/60 instead... the mass of sulfur is twice that of oxygen, so a mass ratio of 40:60 is equivalent to an atom ratio of 1:3. The empirical formula would be SO3.

### What makes up about 40 percent of normal blood and transport oxygen to the body?

Red blood cells (corpuscles)

### Why do you mix nitrogen with air when scuba diving?

actually we dont mix nitrogen nor oxygen we use normal fresh air. The normal Air is 21% oxygen + 78% Nitrogen + 1% others. As humans more oxygen can be toxic for us especially underwater. However, in some cases "Like with Nitrox" we add more oxygen to make the percentage up to 40%, but this require specific training and certification.