Question

Enter your answer in the provided box. A 249-ml benzene solution containing 2.55 g of an organic polymer has an osmotic pressure of 8.27 mm Hg at 19°C. Calculate the molar mass of the polymer. - g/mol Enter your answer in the provided box. Calculate the molality of a 5.93 M ethanol (C2H5OH) solution whose density is 0.9307 g/mL. Ethylene glycol (EG), CH2(OH)CH2 (OH), is a common automobile antifreeze. It is water soluble and fairly nonvolatile (b.p. 197°c). Calculate the boiling point and freezing point of a solution containing 493.5 g of ethylene glycol in 3171 g water. The molar mass of ethylene glycol is 62.07 g/mol. Freezing point: Boiling point:

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Answer 1

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1 mass of polymer 0 Let w gimol is molar mass of polymer = 2,55 g moles of polymer = mas molar may = 2.55 mol a 2.55 g Walmol W.. Volume of solution: 249M1 = 0.2492 - (1000mL = ILL concentration of solution = 6 = mole of polymer Volume of solution (L) C = 2.55 mol = 10.24 mollL - W xo. 2494 w Osmotic prexure = = 8-21 mm H9 T = 0.0109 atm (latm = 760 mm Hg) = van't Hoff factor i l for polymet To temperature - T= 19°C = 292K = iCRT 0.0109 atm = 1 X 10.24 mollL X0.082057 Latm. hl mol-KY X 2926 → We 22509 g/mol Hence, the molar mans of polymer is 22509 gimol