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Yor u UELOW ! 35. What is the molar mass of a nonelectrolyte if 6.02 grams...
Determine the mass, in grams, of sucrose (C12H22O11,M = 342.3 g/mol) needed to prepare a solution with a vapor pressure of 41.1 mm Hg. The glucose is dissolved in 738 g of water at 40 °C. The vapor pressure of pure water at 35 °C is 42.2 mmHg.
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 vapor pressure of water is 23.76 mm Hg at 25°C. How many grams of sucrose, C12H22011, a nonvolatile, nonelectrolyte (MW = 342.3 g/mol), must be added to 191.5 grams of water to reduce the vapor pressure to 23.29 mm Hg? water = H,0 = 18.02 g/mol. g sucrose The common laboratory solvent benzene is often used to purify substances dissolved in it. The vapor pressure of benzene, C6H6, is 73.03 mm Hg at 25°C. In a laboratory experiment, students...
The vapor pressure of benzene is 73.03 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in benzene is testosterone Calculate the vapor pressure of the solution at 25°C when 14.19 grams of testosterone, C grams of benzene, H3802 (288.4 g/mol), are dissolved in 170.9 benzene = C6H6 = 78.12 g/mol. VP (solution) = mm Hg Submit Answer Retry Entire Group 1 more group attempt remaining The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25°C....
The freezing point of benzene C6H6 is 5.50°C at 1 atmosphere. A nonvolatile, nonelectrolyte that dissolves in benzene is testosterone . How many grams of testosterone, C19H28O2 (288.4 g/mol), must be dissolved in 243.0 grams of benzene to reduce the freezing point by 0.500°C ? Refer to the table for the necessary boiling or freezing point constant. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether...
7. The vapor pressure of water at 25.0°C is 23.8 torr. Determine the mass of glucose (molar mass = 180 g/mol) needed to add to 500.0 g of water to change the vapor pressure to 23.3 torr. (20 points) Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.455 g of thyroxine is dissolved in 10.0 g of benzene, the freezing point of the solution is found to...
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
3a. How many grams of sucrose must be added to 430g of water to lower the vapor pressure 1.4mmHg at 25C? The vapor pressure of water at 25C is 233.8 mmHg and molar mass is 342.3 g/mol 3. Vapor pressure lowering a) How many grams of sucrose must be added to 430 R of water to lower the vapor pressure 1.4 mm Hg at 25 °C? The vapor pressure of water at 25°C is 23.8 mm Hg and the molar...
3. Yapor pressure lowering a) How many grams of sucrose must be added to 430 g of water to lower the vapor pressure 1.4 mm Hg at 25 "C? The vapor pressure of water at 25 °C is 23.8 mm Hg, and the molar mass of sucrose is 342.3 g/mol. (5.1 x 10 g b) How many grams of NaCl must be added to the same amount of water as in part a) to lower the vapor pressure the same...
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.