Two balloons are filled, one with pure He 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
A
More in the He filled balloon
B
Same in both balloons
C
More in air filled balloon
D
In the ratio of 
Text Solution
Verified by ExpertsThe correct answer is:
B
Ideal gas equation can be written as
… (i)
From Eq. (i), we have
constant
So, at constant pressure and temperature, all gases will contain equal number of molecules per unit volume.
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