6. Determine the molality of an aqueous solution that is 19.5 percent urea by mass. ___m 7. A 254−mL sample of a sugar

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6. Determine the molality of an aqueous solution that is 19.5percent urea by mass.___m
7. A 254−mL sample of a sugar solution containing 1.13 g of thesugar has an osmotic pressure of30.1 mmHg at 34.3°C. What is the molar mass of the sugar?___ g/mol
8. Calculate the vapor pressure of a solution made by dissolving235 g of urea[(NH2)2CO; molar mass 60.06 g/mol] in 455 g of water at 25°C.___ mm Hg (At 25°C, PH2O = 23.8 mmHg)
9. Be sure to answer all parts.What are the boiling point and freezing point of a 3.15 m solutionof naphthalene in benzene? (The boiling point and freezing point ofbenzene are 80.1°C and 5.5°C, respectively.)Boiling point:___°CFreezing point:___°C
10. How many liters of the antifreeze ethylene glycol[CH2(OH)CH2(OH)] would you add to a car radiator containing 6.75 Lof water if the coldest winter temperature in your area is −20.5°C?Calculate the boiling point of this water-ethylene glycol mixture.(The density of ethylene glycol is 1.11 g/mL.)What is the volume of antifreeze?___ LWhat is the boiling point of the solution?___°C
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