1. The problem statement, all variables and given/known data What's the polarizability of liquid helium given: density= 145kgm^-3 relative permittivity = X = 1.0566 2. Relevant equations alpha (polarizability) = (3(permittivity of free space))/N) / ((X-1)/(X+2)) 3. The attempt at a solution because N is molecules/volume, N=145/6.645x10^-27=2.18x10^28 plug everything in I get alpha = 2.26x10^-41 but I have no idea if this is right or not because i've never had to calculate it before??