.. please do it correct...

Pauling and coauthors used an electric field of E = 4.7 volt cm-1, applied for up to 20 hours. For a mixture of normal and defective hemoglobin to separate into two distinguishable bands, they must travel significantly different distances under these conditions. Estimate the separation of these bands for two species whose charges differ by just one unit and comment on the feasibility of the experiment. [Hint: Use the Stokes drag formula and [1 eV ~40kBT)