Chem 1332
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Chem 1332 as PDF for free.
More details
- Words: 723
- Pages: 4
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
View Attempt 2 of unlimited Title:
Chapter 13
Started:
September 20, 2009 7:09 PM
Submitted:
September 20, 2009 8:09 PM
Time spent:
01:00:08
Total score: 5/12 = 41.67% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 45 What is the strongest form of intermolecular force between solute and solvent in a solution of CH4(g) in toluene, C7H8(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 0% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 100% Score:
2.
0/1
Relative Solubility 5 Which of the following is more soluble in methanol, CaCO3(s) or AgNO3(s). Don't try to type the subscripts, just use letters and numbers.
Student Response 1. AgNO3
Score:
3.
Value
Correct Answer
100%
Equals AgNO3(s) (100%) Equals AgNO3 (100%) Equals silver nitrate (100%)
1/1
Solution Energetics 4 An ionic compound has a slightly negative heat of solution in water. Would you expect it to be very soluble, slightly soluble or nearly insoluble in water?
Student Response
1 of 4
Value
Correct Answer
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
1. slightly soluble
Score:
4.
0%
Equals very soluble (100%) Contains very (0%)
0/1
Henry's Law Calculation 1 The partial pressure of CO2 gas about the liquid in a carbonated drink is 9.0. Assuming that the Henry's law constant for CO2 in the drink is that same as that in water, 3.7 x 10-2 mol/L atm, calculate the solubility of carbon dioxide in this drink.
Student Response Answer .333 Score:
5.
Value
Correct Answer
100%
0.333
1/1
Chapter 8 Molality 7 Determine the molality of a solution prepared by dissolving 5.17 g of cycloheptane in 98.5 g of benzene.
Student Response Answer .535 Score:
6.
Value
Correct Answer
100%
0.54
1/1
PC to Molality 1 A 15.9 mass % aqueous solution of iron(III)chloride has a density of 1.280 g/mL. Calculate the molality of the solution.
Student Response Answer 1.17 Score:
7.
Value
Correct Answer
100%
1.17
1/1
Ionic Dissociation Calculation 1 How many moles of solute particles are present in 3.05 mL of 0.485 M K2SO4? Use scientific notation with 3 significant figures!!!!!
Student Response Answer 1.48E-3
2 of 4
Value
Correct Answer
0%
4.44E-3 (4.44 × 10-3)
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
Score:
8.
0/1
General Properties Comparison 1 Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response 1. (a) 0.04 m CaCl2 (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
2. (a) 0.04 m urea (b) 0.04 m urea (c) 0.04 m CaCl2
100%
3. (a) 0.04 m urea (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
4. (a) 0.04 m CaCl2 (b) 0.04 m urea (c) 0.04 m urea
0%
5. all will be the same
0%
Score:
9.
Correct Answer
Feedback
1/1
Chapter 8 VP 10 Calculate the vapor pressure (in torr) at 333 K in a solution prepared by dissolving 46.6 g of the non-volatile non-electrolye glucose in 118 g of water. The vapor pressure of water at 333 K is 149.44 torr.
Student Response Answer not answered
3 of 4
Value
Correct Answer
0%
143.76
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
Score:
0/1
10. Chapter 8 VP 15 Calculate the vapor pressure (in torr) at 333 K in a solution prepared by dissolving 21.8 g of the non-volatile non-electrolye urea {CO(NH2)2} in 178 g of water. The vapor pressure of water at 333 K is 149.44 torr.
Student Response Answer not answered Score:
Value
Correct Answer
0%
144.14
0/1
11. Chapter 8 MM fp 7 When 0.55 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the freezing point decreased to 5.194 degrees C from 5.5 degrees C. If the Kfp of the solvent is 5.12 K/m, calculate the molar mass of the unknown solute.
Student Response Answer not answered Score:
Value
Correct Answer
0%
184
0/1
12. MM Osmotic Pressure 1 When 0.636 grams of a protein were dissolved in 29.4 mL of solution at 21.4 degrees C, the osmotic pressure was found to be 0.025 atm. Calculate the molar mass of the protein.
Student Response Answer not answered Score:
Value
Correct Answer
0%
20,915
0/1
Done
4 of 4
20-Sep-09 8:12 PM
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
View Attempt 2 of unlimited Title:
Chapter 13
Started:
September 20, 2009 7:09 PM
Submitted:
September 20, 2009 8:09 PM
Time spent:
01:00:08
Total score: 5/12 = 41.67% 1.
Total score adjusted by 0.0
Maximum possible score: 12
IMF in solution 45 What is the strongest form of intermolecular force between solute and solvent in a solution of CH4(g) in toluene, C7H8(l)?
Student Value Response
Correct Answer
Feedback
1. ion-dipole 0% 2. dipoledipole
0%
3. hydrogen 0% bonding 4. dipoleinduced dipole
0%
5. dispersion 100% Score:
2.
0/1
Relative Solubility 5 Which of the following is more soluble in methanol, CaCO3(s) or AgNO3(s). Don't try to type the subscripts, just use letters and numbers.
Student Response 1. AgNO3
Score:
3.
Value
Correct Answer
100%
Equals AgNO3(s) (100%) Equals AgNO3 (100%) Equals silver nitrate (100%)
1/1
Solution Energetics 4 An ionic compound has a slightly negative heat of solution in water. Would you expect it to be very soluble, slightly soluble or nearly insoluble in water?
Student Response
1 of 4
Value
Correct Answer
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
1. slightly soluble
Score:
4.
0%
Equals very soluble (100%) Contains very (0%)
0/1
Henry's Law Calculation 1 The partial pressure of CO2 gas about the liquid in a carbonated drink is 9.0. Assuming that the Henry's law constant for CO2 in the drink is that same as that in water, 3.7 x 10-2 mol/L atm, calculate the solubility of carbon dioxide in this drink.
Student Response Answer .333 Score:
5.
Value
Correct Answer
100%
0.333
1/1
Chapter 8 Molality 7 Determine the molality of a solution prepared by dissolving 5.17 g of cycloheptane in 98.5 g of benzene.
Student Response Answer .535 Score:
6.
Value
Correct Answer
100%
0.54
1/1
PC to Molality 1 A 15.9 mass % aqueous solution of iron(III)chloride has a density of 1.280 g/mL. Calculate the molality of the solution.
Student Response Answer 1.17 Score:
7.
Value
Correct Answer
100%
1.17
1/1
Ionic Dissociation Calculation 1 How many moles of solute particles are present in 3.05 mL of 0.485 M K2SO4? Use scientific notation with 3 significant figures!!!!!
Student Response Answer 1.48E-3
2 of 4
Value
Correct Answer
0%
4.44E-3 (4.44 × 10-3)
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
Score:
8.
0/1
General Properties Comparison 1 Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the lowest osmotic pressure, (ii) the highest vapor pressure, (iii) the highest boiling point?
Student Value Response 1. (a) 0.04 m CaCl2 (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
2. (a) 0.04 m urea (b) 0.04 m urea (c) 0.04 m CaCl2
100%
3. (a) 0.04 m urea (b) 0.04 m CaCl2 (c) 0.04 m CaCl2
0%
4. (a) 0.04 m CaCl2 (b) 0.04 m urea (c) 0.04 m urea
0%
5. all will be the same
0%
Score:
9.
Correct Answer
Feedback
1/1
Chapter 8 VP 10 Calculate the vapor pressure (in torr) at 333 K in a solution prepared by dissolving 46.6 g of the non-volatile non-electrolye glucose in 118 g of water. The vapor pressure of water at 333 K is 149.44 torr.
Student Response Answer not answered
3 of 4
Value
Correct Answer
0%
143.76
20-Sep-09 8:12 PM
View Attempt
https://scholar.uh.edu/webct/ViewStudentAttempt.dowebct?attempt=1768...
Score:
0/1
10. Chapter 8 VP 15 Calculate the vapor pressure (in torr) at 333 K in a solution prepared by dissolving 21.8 g of the non-volatile non-electrolye urea {CO(NH2)2} in 178 g of water. The vapor pressure of water at 333 K is 149.44 torr.
Student Response Answer not answered Score:
Value
Correct Answer
0%
144.14
0/1
11. Chapter 8 MM fp 7 When 0.55 g of an unknown non-electrolyte is dissolved in 50.0 g of benzene, the freezing point decreased to 5.194 degrees C from 5.5 degrees C. If the Kfp of the solvent is 5.12 K/m, calculate the molar mass of the unknown solute.
Student Response Answer not answered Score:
Value
Correct Answer
0%
184
0/1
12. MM Osmotic Pressure 1 When 0.636 grams of a protein were dissolved in 29.4 mL of solution at 21.4 degrees C, the osmotic pressure was found to be 0.025 atm. Calculate the molar mass of the protein.
Student Response Answer not answered Score:
Value
Correct Answer
0%
20,915
0/1
Done
4 of 4
20-Sep-09 8:12 PM
