A closed vessel A having volume V contains N2 at pressure P and temperature T. Another closed vessel B having the same volume V contains He at the same pressure P but temperature 2T. The ratio of masses of N2 and He in the vessels A and B is:

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1 : 2

3 : 2

5 : 2

14 : 1

answer is D.

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Detailed Solution

PV = nRTSo at same pressure and volume,

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