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Grade 11Physical Chemistry

Assuming ideal gas behaviour, how many atoms of Ar are contained in human breath of 0.5L at 37C and 1 atm pressure. Air consists of 1 % Ar atoms. Assuming that argon atoms from the last breath of Plato have been distributed randomly throughout the atmosphere(5*10^18 m^3). How long would it take to breath one of these atoms if breath rate is 10/min

Mvskm Srinivas

9 Years agoGrade 11

1 Answer

Vikas TU

8 Years ago

Dear Student,

From the ideal gas equation:

PV=nRT
Given values after substitution we get,

1x .5 = n x 0.082 x 310

Hereby n = 0.02

So, no of atoms are 0.02 N

Here as Ar is 1% so it will be 0.0002N atoms.

Cheers!!

Regards,

Vikas (B. Tech. 4^th year
Thapar University)

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