earth's atmosphere is approximately 78% nitrogen and 21% oxygen. what is the mass in grams of oxygen in a cubic meter of air in a typical classroom at 1 atm and 25C (1m^3=1000L)

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21-03-2022
Chemistry

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earth's atmosphere is approximately 78% nitrogen and 21% oxygen. what is the mass in grams of oxygen in a cubic meter of air in a typical classroom at 1 atm and 25C (1m^3=1000L)

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okpalawalter8 okpalawalter8 · Answer 1 · 2022-03-25T11:27:01+01:00

With the earth's atmosphere at approximately 78% nitrogen and 21% oxygen, we have that the mass in grams of oxygen is mathematically given as

Mass of O2=2.74.7g

What is the mass in grams of oxygen?

Question Parameters:

Earth's atmosphere is approximately 78% nitrogen and 21% oxygen.

Generally, the equation for the ideal gas is mathematically given as

PV=nRT

Therefore

n=PV/RT

n=1*1000L/0,0821*298k

n=40.87mol

In conclusion

Where mole of O is 8.58

Therefore

Mass of O2=8.58*32

Mass of O2=2.74.7g