Question

Three vessels of equal capacity have gases at the same temperature and pressure. The first vessel contains neon (monatomic), the second contains chlorine (diatomic), and the third contains uranium hexafluoride (polyatomic). Do the vessels contain equal number of respective molecules? Is the root mean square speed of molecules the same in the three cases? If not, in which case is vrms the largest?

Answer 1

Yes ,
A/c to Avogadro's law :-equal amount of gases have equal number of molecules at the same temperature and pressure.


Root mean square velocity = √{3RT/M}
I.e.
Vrms is inversely proportional to molecular mass of the gas .
So, root mean square of molecules of three gases is not same .

When molecular mass of the gas is less than RMS velocity is high.
Hence, largest RMS velocity in case of Ne.

Answer 2

Answer:

hope you UNDERSTOOD this answer