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Complete the following problems on a separate sheet of paper. What is the molality of a solution that contains 48 grams of sodium chloride and 250 mL of. Sample Problem. Calculate the molality of a solution of. 13.5g of KF dissolved in 250. g of water. (. ) mol of solute. = kg solvent. 1 mol KF. 13.5g. 58.1. 0.250 kg. The molality of a solution is calculated by taking the moles of solute and dividing In the above problem, 58 grams/mol is the molecular weight of NaCl. Dividing Aug 20, 2013 - Feb 5, 2010 -Apr 6, 2016 - Problem #1: A solution of H2SO4 with a molal concentration of 8.010 m has a density of 1.354 g/mL. What is the molar concentration of this solution? Solution:. Feb 22, 2015 - Feb 22, 2015 - a) What is the molality (m) of the solution? b) How many moles of MgCl2 are contained in 1.76 kg of solvent? c) How many kg of solvent would contain 0.0150