just question 7 please I need a complete solution 7. The boiling point of ethanol (CaHsOH) is 78.5°C. What is the boiling point of3.4 g of vanillin (MW = 152.14 g/mol) in 50.0 g of ethanol (kb of ethanol= 1.22 °C/m)8. What is the minimum mass of ethylene glycol (CaH&Oz2) that must bedissolved in 14.5 kg of water to prevent the solution from freezing at-10.0 F?9. Wastewater discharged into a stream by a sugar refinery contains sucrose(C12H22O11) as its main impurity. The solution contains 3.42 g of sucrose/L. Agovernment industry project is designed to test the feasibility of removingthe sugar by reverse osmosis. What pressure must be applied to the apparatusat 20°C to produce pure water?10. In a study designed to prepare new gasoline-resistant coatings, a polymer chemistdissolves 6.053 g of poly(vinyl alcohol) in enough water to make 100.0 mL ofsolution. At 25°C, the osmotic pressure of this solution is 0.272 atm. What is themolar mass of the polymer sample?

Molality of solution is determined as follows, 1 g = 0.001 kg No.of moles of vanillin=MassMolar mass…

Answered: The boiling point of ethanol (CaHsOH)…

The boiling point of ethanol (CaHsOH) is 78.5°C. What is the boiling point of 3.4 g of vanillin (MW = 152.14 g/mol) in 50.0 g of ethanol (ko of ethanol = 1.22 °C/m)

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

Chapter11: Properties Of Solutions

Section: Chapter Questions

Problem 137CP: In some regions of the southwest United States, the water is very hard. For example, in Las Cruces,...

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Question

just question 7 please I need a complete solution

7. The boiling point of ethanol (CaHsOH) is 78.5°C. What is the boiling point of
3.4 g of vanillin (MW = 152.14 g/mol) in 50.0 g of ethanol (kb of ethanol
= 1.22 °C/m)
8. What is the minimum mass of ethylene glycol (CaH&Oz2) that must be
dissolved in 14.5 kg of water to prevent the solution from freezing at
-10.0 F?
9. Wastewater discharged into a stream by a sugar refinery contains sucrose
(C12H22O11) as its main impurity. The solution contains 3.42 g of sucrose/L. A
government industry project is designed to test the feasibility of removing
the sugar by reverse osmosis. What pressure must be applied to the apparatus
at 20°C to produce pure water?
10. In a study designed to prepare new gasoline-resistant coatings, a polymer chemist
dissolves 6.053 g of poly(vinyl alcohol) in enough water to make 100.0 mL of
solution. At 25°C, the osmotic pressure of this solution is 0.272 atm. What is the
molar mass of the polymer sample?

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