Find the average magnitude of linear momentum of a helium molecule in a sample of helium gas at `0^(@)C.` Mass of a helium molecule`=6.64xx10^(-27)kg`and Blotzmann constant `=1.38xx10^(-23) J K^(-1).`

Explanation

`M = 4 xx 10^-3 kg `
` V_avg = (sqrt(8RT))/(sqrt(piM))`
` = (sqrt(8 xx 8.3 xx 273))/(sqrt(3.14 xx 4 xx 10^-3))`
`=1201.35`
Momentum
` =M xx V_avg `
` = 6.64 xx 10^-27 xx 1201.35`
` = 7.97 xx 10 ^24`
` = 8 xx 10^-24kg-m/s`