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$$ mathrm R f=frac mathrm Length mathrm travelled mathrm by mathrm the mathrm solute still left(mathrm cm proper) mathrm Length mathrm travelled mathrm by mathrm the mathrm solvent left(mathrm cm ideal) $$We at Whole Melt Extract have not or will never jeopardize our quality and standards to make an additional buck, for the price of the h