
14. If the molar mass of toluene is 92.6 g/mol, how much toluene is needed to...
If the molar mass of toluene 92.6 g/mol, how much of toluene is needed to depress the freezing point of 200 g of benzene by 0.47 degrees Celsius? Kf= 5.12 C/m
14. If the molar mass of toluene is 925 gmol, how much toluene is needed to depress the freezing point of 200 g of benzene by 0.47°C? K 5 .12"C/m A 1.79 B. 179 C.0.0.919 D. 18.359 E. Not enough information given to answer 15. For crystal lattice where dimension, a b=cand also all angles a Bay = 90° represents: B. cubic A tetragonal tetragonal D. orthorhombic E both A and C 16. Consider the compounds water (HO). dimethylether (CH,OCH),...
Е. попе E. 0.733 and 1.324 14. the molar mass of toluene is 92.6 gmol, how much tokuene is needed to depress the freezing point of 200 g of benzene by 047C? K 5.12 Cm a The vapor pressure of pure water at 26 "C is 25.2 torr. What is he vapor pressure of a solution that contains 16.0 g of glucose (CaHuO) dissolved in 80 g of water? A. 1.7g A. 14.1 tor B. 17g B. 24.7 torm C....
What is the molar mass of a nonpolar molecular compound if 6.34 g dissolved in 53.4 g benzene begins to freeze at 2.81 °C? The freezing point of pure benzene is 5.50 °C and the freezing point depression constant, Kf, is -5.12 °C/m. A. 2.26 x 10-4 g/mol B. 0.226 g/mol C. 12.1 g/mol D. 226 g/mol
The molar mass of unknown molecular compound is determined using freezing point depression. The substance is dissolved in benzene (C6H), an organic solvent. Use the data below to determine the molar mass of the substance. 8.65 g Mass of unknown compound Freezing point of solution Volume of benzene -10.21°C 35.0 mL 5.53°C Freezing point of benzene Density of benzene Kf for benzene 0.8765 g/mL 5.12°C/m Molar mass = g/mol
Pure benzene, C6H6, has a molar mass of 78.114 g mol-1, a density of 0.8765 g mL-1, a freezing point of 5.45°C, and a boiling point of 80.2°C. Its freezing point depression and boiling point elevation constants are: Kf = 5.07°C m-1; Kb = 2.53oC m-1. A solution was made by taking 33.88 g of an unknown nonelectrolyte and dissolving it in 175.0 g of benzene. The measured freezing point of the solution was 1.65oC. Calculate the molar mass of...
What is the molar mass of 0.85 g of an unknown, non-electrolyte, compound that depresses the freezing point of 100. g of benzene by 0.47°C? Kf of benzene is 5.12ºC/m.
8) Dissolving 7.75 g of a substance into 825 g of benzene at 298 K raises the boiling point by 0.575 K. Given that K, = 5.12 K kg mol-1 and K) = 2.53 K kg mol-1, calculate the freezing point depression, the molar mass of the solute, and the mole fraction of benzene in the solution.
1-Calculate the vapor pressure of a solution of 0.34 mol of cholesterol in 4.4 mol of toluene at 32°C. Pure toluene has a vapor pressure of 41 torr at 32°C. (Assume ideal behavior.) 2-The freezing point of benzene is 5.5°C. What is the freezing point of a solution of 3.60 g of naphthalene (C10H8) in 655 g of benzene (Kf of benzene = 4.90°C/m)? 3-In a study designed to prepare new gasoline-resistant coatings, a polymer chemist dissolves 6.015 g poly(vinyl...
The freezing point of benzene is 5.5 °C. What is the molar mass of a nonionizing solute if 1.06 grams of the solute added to 24.83 g of benzene lowers the freezing point to 3.97. The Kf of benzene is -5.12 °C/m. Record your answer as a whole number.