MISSED THIS? Watch KCV Colligative Properties Read Section 14.6. You can click on the Review link to access the section in your e Text. An aqueous solution containing 36.7 g of an unknown molecular (non-electrolyte) compound in 141.6 g of water was found to have a freezing point of -1.2 °C. Calculate the molar mass of the unknown compound (Use Kf 1.86 °C/m) Express your answer using two significant figures. IVE ΑΣΦΑ M Submit = Request Answer ? g/mol

MISSED THIS? Watch KCV Colligative Properties Read Section 14.6. You can click on the Review link to access the section in your e Text. An aqueous solution containing 36.7 g of an unknown molecular (non-electrolyte) compound in 141.6 g of water was found to have a freezing point of -1.2 °C. Calculate the molar mass of the unknown compound (Use Kf 1.86 °C/m) Express your answer using two significant figures. IVE ΑΣΦΑ M Submit = Request Answer ? g/mol

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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A solution of 0.690 g of an organic compound in 100.0 g of benzene has a freezing point of 5.248°C. What are the molality of the solution and the molar mass of the solute? The normal freezing point of benzene is 5.500°C and the Kf for benzene is 5.12°C/m. Solve for: molality = molar mass =
What is a colligative property? Explain why the freezing point of a solution depresses and boiling point elevates compared to the pure solvent. If the density of milk is 1.035 g/cm3 and the freezing point is -0.5250 ∘C∘C, calculate the freezing point depression constant, Kf, for milk if the temperature of the mixture drops to -0.7750 ∘C∘C. Assume the whipping cream is milk and therefore your pure solvent is milk. The formula for sugar, sucrose, is C12H22O11. Use one dry oz = 28.35 g. Explain how you came to your answer using equations and/or complete sentences.
A student dissolves 14. g of styrene (C₂H₂) in 200. mL of a solvent with a density of 1.03 g/mL.. The student notices that the volume of the solvent does not change when the styrene dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits. molarity molality 1 0 0.0 0.0 8 X G
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When 4.18 g of a certain molecular compound X are dissolved in 45.0 g of benzene (C6H6), the freezing point of the solution is measured to be 4.9 °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 the correct number of significant digits. □□ 品 5
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1. Suppose that you add 27.5 g of an unknown molecular compound to 0.250 kg of benzene, which has a Kf of 5.12 oC/m. With the added solute, you find that there is a freezing point depression of 3.58 oC compared to pure benzene. What is the molar mass (in g/mol) of the unknown compound? 2. What is the freezing point (in degrees Celcius) of 3.70 kg of water if it contains 187.4 g of CaBr2? The freezing point depression constant for water is 1.86 oC/m and the molar mass of CaBr2 is 199.89 g/mol. 3. What mass, in grams, of NaCl needs to be added to 1.6 kg of water in order to create a solution with a freezing point of -5.6 °C? The freezing point depression constant of water is 1.86 ºC/m.