Homework Help: AP Chem

Posted by John Smith on Wednesday, December 12, 2012 at 8:38pm.

A 1.73 g sample of a molecular compound
is dissolved in 105 g of tetrachloromethane
(carbon tetrachloride). The normal boiling
point of the solution is 61.51C, the normal
boiling point of CCl4 is 61.2C. The boiling
point constant for CCl4 is 4.95 K · kg/mol.
What is the molar mass of the compound?
Answer in units of g/mol

AP Chem - DrBob222, Wednesday, December 12, 2012 at 11:46pm
delta T = Kb*m
Solve for m

m = mols/kg solvent
Solve for mols

mols = grams/molar mass
Solve for molar mass.

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