Two balloons are filled, one with pure helium gas and the other by air, respectively. If the pressure and temperature of these balloons are same, then the number of molecules per unit volume is
Text Solution
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Ideal gas equation can be written as
(i)
In this equation,
number of moles of the gas,
pressure of the gas,
volume of the gas,
universal gas constant
and 
temperature of the gas
From Eq. (i), we have
Hence, from above expression, if the pressure and temperature of ballons are same, then the number of molecules per unit volume is same in both the balloons.
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