Homework Help: chemistry

Posted by zainab on Saturday, February 5, 2011 at 2:50pm.

hen 9.3 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the boiling point the boiling point increased to 81.19 degrees C from 80.1 degrees C. If the Kbp of the solvent is 2.53 K/m, calculate the molar mass of the unknown solute.
The answer is 432. I dont know how

chemistry - DrBob222, Saturday, February 5, 2011 at 8:52pm
delta T = Kb*molality
Solve for molality

molality = moles/kg solvent
Solve for moles.

moles = grams/molar mass
solve for molar mass.

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