The mass percentage in composition of dry air at sea level contains approximately 75.5% of nitrogen. if the atmospheric pressure is 1 atm, then what will be the partial pressure of nitrogen. (average molecular mass of air=29)
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Answer:
By mole fraction (i.e., by number of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.｡◕‿◕｡
Answer:
Explanation:
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
P
gas
=
χ
gas
×
P
total
, where
P
gas
- the partial pressure of a gas
χ
gas
- the mole fraction of that gas
P
total
- 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