90. Solving a chemistry problem

56. When separating Hg2+ and Cu2+ cations contained in the analyzed solution by paper chromatography using n-butanol saturated with HCl as the PF, the following data were obtained: the distance from the starting line to the solvent front line L = 100.0 mm, the distance from the starting line to the center of the 5 components being separated l (Hg2+) = 72 mm l (Cu2+) = 7 mm. Calculate the mobility coefficients Rf and the separation coefficient a