Question

For Helium gas molecules at N.T.P. ,what percentage of the total number of molecules will have their speeds between v and vr.m.s.​

Answer 1

Answer:

Explanation:

Correct option is

B

1.3 x 10  

3

 m/s

NTP condition :        T=298 K                 M=0.004 kg/mol        

     

Root mean square velocity       V  

rms

​

=  

M

3RT

​

 

​

 

∴      V  

rms

​

=  

0.004

3(8.314)(298)

​

 

​

=1.36×10  

3

 m/s