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#1




mg of oxygen per liter to percent of oxygen in air
Does anyone know this conversion?
Thank you. 
#2




Re: mg of oxygen per liter to percent of oxygen in air
Quote:
In "normal" air, it is 21% O2 on a mole fraction basis, or 21 mol O2 per 100 mol of air. Since O2 has a moleculare weight of 32, and air 29, on a mass/mass basis, this is 0.21 x 32/29 = 0.232 kg O2/ kg air. That will be independent of temperature and pressure. Divide by density of air at your temp. and pressure; you'll have mass of O2 per volume of air. 
#3




Re: mg of oxygen per liter to percent of oxygen in air
I don't see any correction for the amount of water vapor in the air (gr/lb), which would affect the oxygen content.

#4




Re: mg of oxygen per liter to percent of oxygen in air
lpm*4+20=FiO2

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