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Calculate the molar mass of vitamin K.?
When 2.53 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.49 ∘C.Calculate the molar mass of vitamin K.
- Roger the MoleLv 72 months agoFavorite Answer
(8.49∘C) / (37.8 ∘C/ m) = 0.22460 m
(0.22460 mol/kg) x (0.0250 kg) = 0.005615 mol
(2.53 g) / (0.005615 mol) = 450.5788 g/mol = 451 g/mol
- ChemTeamLv 72 months ago
Some solved examples here:
#5 and #6 use camphor.
Assume the van 't Hoff factor to be equal to 1.