What Is the Molar Mass of a Nonpolar Molecular Compound

question 48

Multiple Choice

What is the molar mass of a nonpolar molecular compound if 3.42 grams dissolved in 41.8 grams benzene begins to freeze at 1.17°C? The freezing point of pure benzene is 5.50°C and the molal freezing point constant,K_f,is -5.12°C/m.

• A) 2.89 g/mol
• B) 69.2 g/mol
• C) 96.7 g/mol
• D) 126 g/mol
• E) 358 g/mol

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