Question

a sample of gas contains 15 molecule with the speed 3and 25 with 5 and 30 with 8 it calculate The RMS velocity​

Answer 1

formula for R.m.s velocity= (see the image)

here n1, n2 and n3 is the no. of molecules .....

n1= 15

n2=25

n3=30

and v1, v2 and v3 is the speed of the molecules.....

v1=3

v2=5

v3=8

put these values in the formula and you will get the answer ~ 6.2m/s