Asked by Ellene
A solution is prepared with an unknown compound with an empirical formula of C3H7NO.
The solution is made by dissolving 30.0 mg of compound in 1.200 g of the organic solvent biphenyl. The freezing point was depressed by 1.37C. What are the molar mass and molecular formula of the compound?
The solution is made by dissolving 30.0 mg of compound in 1.200 g of the organic solvent biphenyl. The freezing point was depressed by 1.37C. What are the molar mass and molecular formula of the compound?
Answers
Answered by
DrBob222
delta T = Kf*molality
Solve for molality.
molality = moles/kg solvent
Solve for moles
moles = grams/molar mass
Solve for molar mass.
molar mass/empirical mass and round to the nearest whole number = n
molecular formula is (empirical formula)<sub>n</sub>
Solve for molality.
molality = moles/kg solvent
Solve for moles
moles = grams/molar mass
Solve for molar mass.
molar mass/empirical mass and round to the nearest whole number = n
molecular formula is (empirical formula)<sub>n</sub>
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