Assume air contains 20% O2 and 80% N2 by volume. If air is compressed to 5.5atm. What is the partial pressure of oxygen
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As you know, the partial pressure exerted by a gas that's part of a gaseous mixture depends on two things
the total pressure of the mixture
the mole fraction of that gas
Your equation will look like this
Pgas=χgas×Ptotal , where
Pgas - the partial pressure of a gas
χgas - the mole fraction of that gas
Ptotal - the total pressure of the mixture
In this case, you know that the total pressure of the mixture is equal to 1.0 atm. Now, in order to find a gas' mole fraction, you need to know
the number of moles of that gas present in the mixture
the total number of moles present in the mixture
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