Question 1

The vapor pressure of pure acetone (propanone)  is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of the non-volatile solute in the solution?

Accepted Answer

A)   0.87
B)   0.69
C)   0.32
D)   0.13
E)   0.045F) A) and D)
G) All of the above

Question 2

Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body. What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? Temperature = 25.0°C

Accepted Answer

A)   110. g/mol
B)   146 g/mol
C)   220. g/mol
D)   1340 g/mol
E)   1780 g/molF) A) and C)
G) B) and C)

Question 3

Select the type of interaction that best describes the attraction between Mg2+ ions and water molecules.

Accepted Answer

A)   dipole-dipole
B)   dipole-induced dipole
C)   ion-dipole
D)   ion-induced dipole
E)   ion-hydrogen bondF) A) and B)
G) A) and C)

Question 4

Select the strongest electrolyte from the following set.

Accepted Answer

A)   CH3CH2OH, ethanol
B)   LiNO3
C)   C6H12O6, glucose
D)   CCl4
E)   HFF) A) and B)
G) None of the above

Question 5

Ideal solutions do not conform to Raoult's Law.

Accepted Answer

A) True 
 B)False

Question 6

Colloidal particles may be solids, liquids, or gases.

Accepted Answer

A) True 
 B)False

Question 7

The Henry's Law constant (k)  for carbon monoxide in water at 25°C is 9.71 × 10-4 mol/(L·atm) . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Accepted Answer

A)   3.53 × 10-4 g
B)   2.67 × 10-3 g
C)   9.89 × 10-3 g
D)   7.48 × 10-2 g
E)   None of these choices are correct.F) A) and B)
G) A) and C)

Question 8

How many moles of bromide ions are present in 750.0 mL of 1.35 M MgBr2?

Accepted Answer

A)   0.506 mol
B)   1.01 mol
C)   2.03 mol
D)   3.04 mol
E)   None of these choices are correct.F) A) and D)
G) D) and E)

Question 9

Sodium hydroxide is a common ingredient in drain cleaners such as Drano. The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310. What is the molality of the solution?

Accepted Answer

A)   0.310 m
B)   0.690 m
C)   1.24 m
D)   12.4 m
E)   25.0 mF) A) and B)
G) C) and D)

Question 10

Which of the following aqueous liquids will have the lowest freezing point?

Accepted Answer

A)   0.5 m C12H22O11 (sucrose) 
B)   0.5 m Ca(NO3) 2
C)   0.5 m NiSO4
D)   0.5 m Li3PO4
E)   pure waterF) A) and C)
G) D) and E)

Question 11

Helical segments of protein molecules arise through hydrogen bonding between C=O and N-H groups.

Accepted Answer

A) True 
 B)False

Question 12

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr2 in 375.0 g of water.

Accepted Answer

A)   0.03035 m
B)   0.01600 m
C)   0.1210 m
D)   0.4446 m
E)   None of these choices are correct.F) A) and E)
G) A) and B)

Question 13

The dimensions of typical colloidal particles are of the order of

Accepted Answer

A)  dm
B)  pm
C)   mm..
D)   mm
E)  fmF) B) and D)
G) A) and B)

Question 14

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Accepted Answer

A)   0.1 M K2SO4
B)   0.1 M CaCl2
C)   3.0 M LiF
D)   0.1 M MgSO4
E)   0.1 M NaClF) B) and C)
G) A) and C)

Question 15

Consider the molecular substances I2, H2O, and C8H18. Which of them is/are soluble in CCl4?

Accepted Answer

A)   only I2
B)   only H2O
C)   only C8H18
D)   I2 and C8H18
E)   H2O and C8H18F) B) and E)
G) A) and C)

Question 16

The most abundant molecules in the cell membranes of most species are

Accepted Answer

A)   proteins.
B)   sugars.
C)   phospholipids.
D)   fatty acids.
E)   steroids.F) A) and C)
G) B) and D)

Exam 13: The Properties of Mixtures Solutions and Colloids

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 × 10^-4 mol/(L·atm) . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct Answer
verified

The most abundant molecules in the cell membranes of most species are

Correct Answer
verified

Which of the following aqueous liquids will have the lowest freezing point?

Correct Answer
verified

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of the non-volatile solute in the solution?

Correct Answer
verified

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water.

Correct Answer
verified

Select the type of interaction that best describes the attraction between Mg²⁺ ions and water molecules.

Correct Answer
verified

Ideal solutions do not conform to Raoult's Law.

Correct Answer
verified

How many moles of bromide ions are present in 750.0 mL of 1.35 M MgBr₂?

Correct Answer
verified

The dimensions of typical colloidal particles are of the order of

Correct Answer
verified

Sodium hydroxide is a common ingredient in drain cleaners such as Drano. The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310. What is the molality of the solution?

Correct Answer
verified

Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body. What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? Temperature = 25.0°C

Correct Answer
verified

Helical segments of protein molecules arise through hydrogen bonding between C=O and N-H groups.

Correct Answer
verified

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct Answer
verified

Colloidal particles may be solids, liquids, or gases.

Correct Answer
verified

Consider the molecular substances I₂, H₂O, and C₈H₁₈. Which of them is/are soluble in CCl₄?

Correct Answer
verified

Select the strongest electrolyte from the following set.

Correct Answer
verified

Exam 13: The Properties of Mixtures Solutions and Colloids

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 × 10-4 mol/(L·atm) . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct AnswerverifiedShow Answer

The most abundant molecules in the cell membranes of most species are

Correct AnswerverifiedShow Answer

Which of the following aqueous liquids will have the lowest freezing point?

Correct AnswerverifiedShow Answer

The vapor pressure of pure acetone (propanone) is 266 torr. When a non-volatile solute is added, the vapor pressure of acetone above the solution falls to 232 torr. What is the mole fraction of the non-volatile solute in the solution?

Correct AnswerverifiedShow Answer

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr2 in 375.0 g of water.

Correct AnswerverifiedShow Answer

Select the type of interaction that best describes the attraction between Mg2+ ions and water molecules.

Correct AnswerverifiedShow Answer

Ideal solutions do not conform to Raoult's Law.

Correct AnswerverifiedShow Answer

How many moles of bromide ions are present in 750.0 mL of 1.35 M MgBr2?

Correct AnswerverifiedShow Answer

The dimensions of typical colloidal particles are of the order of

Correct AnswerverifiedShow Answer

Sodium hydroxide is a common ingredient in drain cleaners such as Drano. The mole fraction of sodium hydroxide in a saturated aqueous solution is 0.310. What is the molality of the solution?

Correct AnswerverifiedShow Answer

Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body. What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? Temperature = 25.0°C

Correct AnswerverifiedShow Answer

Helical segments of protein molecules arise through hydrogen bonding between C=O and N-H groups.

Correct AnswerverifiedShow Answer

Which of the following aqueous solutions should demonstrate the most ideal behavior?

Correct AnswerverifiedShow Answer

Colloidal particles may be solids, liquids, or gases.

Correct AnswerverifiedShow Answer

Consider the molecular substances I2, H2O, and C8H18. Which of them is/are soluble in CCl4?

Correct AnswerverifiedShow Answer

Select the strongest electrolyte from the following set.

Correct AnswerverifiedShow Answer

The Henry's Law constant (k) for carbon monoxide in water at 25°C is 9.71 × 10^-4 mol/(L·atm) . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Cadmium bromide is used in photography and lithography. Calculate the molality of a solution prepared by dissolving 45.38 g of CdBr₂ in 375.0 g of water.

Correct Answer
verified

Select the type of interaction that best describes the attraction between Mg²⁺ ions and water molecules.

Correct Answer
verified

Correct Answer
verified

How many moles of bromide ions are present in 750.0 mL of 1.35 M MgBr₂?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Consider the molecular substances I₂, H₂O, and C₈H₁₈. Which of them is/are soluble in CCl₄?

Correct Answer
verified

Correct Answer
verified