Question

A 2.97 g sample of a molecular compound
is dissolved in 103 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 ยท kg/mol.
What is the molar mass of the compound?
delta T = Kb*molality
Solve for molality

m = moles/kg solvent
Solve for moles

moles = grams/molar mass
Solve for molar mass.
pv=nrt

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