Posted by John on Monday, February 1, 2010 at 3:37am.
Remember the definition of molality.
m = # moles solute/kg solvent.
Total g solution = 1820
mass hexane (C6H14) = 419
mass solvent (C6H6) = 1820-419 = 1401 g.
moles C6H14 = 419/molar mass.
kg solvent = 1.401
You do the math. Check my numbers.
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