Question

What is the molality of a solution containing 5.0 moles of solute in 3.2 kg of solvent? Round to the nearest tenth. Don't forget the unit.

Answer 1

The molality of the solution is a measure of its concentration that can be calculated by dividing the amount of substance in moles by the amount of the solvent in kilograms. Mathematically, this can be expressed as that of the equation below.
                              molality = amount of solute (mole) / amount of solvent (kg)
                              molality = 5 moles / 3.2 kg
                              molality = 1.5625 m
Rounding off the answer to the nearest tenths, will give the final answer of 1.6 m.