Estimate the number of collisions per second suffered by a molecule in a sample of hydrogen at STP.The mean free path (average distance covered by a molecule between successive collisions)=1.38xx10^(-5)cm.`

Explanation

We have V_mean = (sqrt (8RT))/(sqrt(pi M)) `
` =(sqrt(8 xx 83 xx 273))/(sqrt(3.14 xx 2 xx 10^-3))`
` =1698.96`
` Total distance =1698.96 m`
`No. of collision =(1698.96)/(1.38 xx 10^-7)`
` =1.23 xx 10^10`