0.263 g of an organic compound (a non-electrolyte) is dissolved in 20.0 g of cyclohexane (C6H12) and the solution freezes at 4.7oC. Pure cyclohexane has a freezing point at 6.5oC and a freezing point depression constant (Kf) of 20.5 oC/m. Calculate the molar mass of the organic compound. (A) 110 g/mol (B) 130 g/mol (C) 150 g/mol (D) 210 g/mol

given that mass of cyclohexane is (wB) = 0.263 grams freezing point of Pure cyclohexane (solvent)…

Answered: 0.263 g of an organic compound (a…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter13: The Chemistry Of Solutes And Solutions

Section: Chapter Questions

Problem 70QRT

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0.263 g of an organic compound (a non-electrolyte) is dissolved in 20.0 g of cyclohexane (C₆H₁₂) and the solution freezes at 4.7^oC. Pure cyclohexane has a freezing point at 6.5^oC and a freezing point depression constant (K_f) of 20.5 ^oC/m. Calculate the molar mass of the organic compound.

(A) 110 g/mol

(B) 130 g/mol

(D) 210 g/mol

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