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Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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
Transcribed Image Text:A solution is made by dissolving 0.540 mol of nonelectrolyte solute in 757 g of benzene. Calculate the freezing point, Tf, and
boiling point, Tú, of the solution. Constants can be found in the table of colligative constants.
Tf
=
Tb =
°C
°C
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- 19.45 g of an unknown compound decreased the freezing point of 303 g of benzene (Kf= 5.12 ∘C /m) by 2.98 ∘C. What is the molar mass of the compound?arrow_forwardWhat is the mole fraction of propanol, CH3CH2CH2OH, in the vapor phase from a solution consisting of a mixture of propanol and isopropanol, (CH3)2CHOH, at 25.00 °C, if the total pressure above the solution is 35.29 torr? The vapor pressures of pure propanol and NaN at 25.00 °C are 20.90 torr and 45.20 torr, respectively.arrow_forwardexplain step by steparrow_forward
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- 22.7 g of an unknown molecular solute is dissolved in 4.11 moles of phenol (C6H6O), causing the freezing point of phenol to decrease by 3.93 °C. Calculate the molar mass of the solute. For phenol, the molar mass is 94.11 g/mol and Kf = 6.84 °C/m.arrow_forwardThe freezing point of benzene, C6H6, is 5.500 °C at 1 atmosphere. Kf(benzene) = 5.12 °C/mIn a laboratory experiment, students synthesized a new compound and found that when 11.98 grams of the compound were dissolved in 212.6 grams of benzene, the solution began to freeze at 4.500 °C. The compound was also found to be nonvolatile and a non-electrolyte.What is the molecular weight they determined for this compound? ?g/molarrow_forwardConsider a body of water in equilibrium with solid calcium sulfate, CaSO4, for which Ksp = 3.0 * 10^-5 at 35 degrees C. Calculate the solubility, in g/L of calcium sulfate in water assuming that other reactions are negligible.arrow_forward
- A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.04°C. What is the composition by mass of the solid?arrow_forwardCalculate the molality of a solution prepared by dissolving 6.98 g of sodium hydroxide (NaOH) in 134 g of H2O.arrow_forwardWhen 60.1 mg of a certain molecular compound X are dissolved in 70.0 g of benzene (CH), the freezing point of the solution is measured to be 5.4 °C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 1 significant digit. 0 ☐ X x10 Śarrow_forward
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