Calculate the molality of a solution if 225g of C6H6 is dissolved in 1.63 kg of a solvent.

Answer 1

molar mass C6H6 = 78 g/mole

molality = moles solute/kg solvent

moles solute = 225 g C6H6 x 1 mole/78 g = 2.88 moles

kg solvent = 1.63 kg

molality = 2.88 moles/1.63 kg = 1.77 molal