Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy F1F1F1S1F1F1F10 F1F1F1S1F1F1F103.83 F1F1F1S1F1F1F10 10F1F1F1S1F1F1F1018 J?

A) NaCl (d F1F1F1S1F1F1F10 294 pm) B) MgS (d F1F1F1S1F1F1F10 241 pm) C) LiF (d F1F1F1S1F1F1F10 189 pm) D) CaO (d F1F1F1S1F1F1F10 235 pm) E) AlN (d F1F1F1S1F1F1F10 185 pm) A) NaCl (d F1F1F1S1F1F1F10 294 pm) B) MgS (d F1F1F1S1F1F1F10 241 pm) C) LiF (d F1F1F1S1F1F1F10 189 pm) D) CaO (d F1F1F1S1F1F1F10 235 pm) E) AlN (d F1F1F1S1F1F1F10 185 pm)

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer. density F1F1F1S1F1F1F10 1.022 g/mL total mass of ions F1F1F1S1F1F1F10 35.17 g/kg concentration of ions F1F1F1S1F1F1F10 1.15 M

The molarity gives the moles of ions in

What is the boiling point of a 3.25 m KCl solution (Kb F1F1F1S1F1F1F10 0.52F1F1F1S1F1F1F10C/m for water)?

A) 96.62F1F1F1S1F1F1F10C B) 98.31F1F1F1S1F1F1F10C C) 100.0F1F1F1S1F1F1F10C D) 101.7F1F1F1S1F1F1F10C E) 103.4F1F1F1S1F1F1F10C A) 96.62F1F1F1S1F1F1F10C B) 98.31F1F1F1S1F1F1F10C C) 100.0F1F1F1S1F1F1F10C D) 101.7F1F1F1S1F1F1F10C E) 103.4F1F1F1S1F1F1F10C

What is the molarity of a sucrose (C12H22O11) solution that produces an osmotic pressure of 2.65 atm at 25F1F1F1S1F1F1F10C?

A) 0.0349 M B) 0.127 M C) 0.0127 M D) 0.108 M E) 0.398 M A) 0.0349 M B) 0.127 M C) 0.0127 M D) 0.108 M E) 0.398 M

Exam 11: Solutions: Properties and Behavior

Describe how the molar mass of a compound can be determined from data obtained in two experiments: (1) measurements of the freezing point, and (2) measurements of the boiling point of a solution of the compound.

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Question 61

Identify the following statement as true or false and choose the correct explanation. "For solutions with the same reverse osmotic pressure at the same temperature, the molarity of a sodium chloride solution will always be less than the molarity of a calcium chloride solution."

(Multiple Choice)

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Question 62

Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  10^¹⁸ J?

(Multiple Choice)

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Question 63

What information is provided by the van 't Hoff factor?

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Question 64

Which of the following compounds has the largest melting point?

(Multiple Choice)

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Question 65

Which of the following solutions, assuming equal volumes and a nonvolatile solute, would have the lowest boiling point?

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Question 66

A solution contains 6.50 mol water, 0.300 mol sucrose, and 0.200 mol glucose. The solutes are nonvolatile. What is the vapor pressure of the solution at 35C given that the vapor pressure of water is 42.2 torr?

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Question 67

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer. density  1.022 g/mL total mass of ions  35.17 g/kg concentration of ions  1.15 M

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Question 68

Which of the following must be true if the dissolution of an ionic solid in water is exothermic?

(Multiple Choice)

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Question 69

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (K_b  3.63C/m)?

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Question 70

Ethylene glycol is used commonly as an antifreeze in automobile radiators. Automobile temperatures in the U.S. are commonly measured in degrees Fahrenheit. What is the freezing point in F of a 50:50 mixture of ethylene glycol and water by volume? (C₂H₆O₂, 62.07 g/mol, 1.1132 g/mL, K_f  3.35F/m).

(Short Answer)

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Question 71

What is the boiling point of a 3.25 m KCl solution (K_b  0.52C/m for water)?

(Multiple Choice)

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Question 72

Which one of the ionic compounds below would you expect to have the smallest (least negative) lattice energy?

(Multiple Choice)

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Question 73

Which of the following will require the greatest energy input to separate the ions?

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Question 74

A solution is prepared by mixing 75 g of benzene (C₆H₆) with 25 g of toluene (C₇H₈). Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

(Multiple Choice)

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Question 75

What is the molality of a solution produced by dissolving 14.40 g of LiCl (42.39 g/mol) in water to make 0.104 L of solution with a density of 1.102 g/mL?

(Multiple Choice)

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Question 76

What is the molarity of a sucrose (C₁₂H₂₂O₁₁) solution that produces an osmotic pressure of 2.65 atm at 25C?

(Multiple Choice)

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Question 77

Predict the relationship between the lattice energies (U) of KBr and CaO.

(Multiple Choice)

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Question 78

Which statement regarding osmotic pressure is not correct? Osmotic pressure ________

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Question 79

Which listing of ionic compounds is in order of increasing melting point?

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Question 80

Showing 61 - 80 of 150

Exam 11: Solutions: Properties and Behavior

Describe how the molar mass of a compound can be determined from data obtained in two experiments: (1) measurements of the freezing point, and (2) measurements of the boiling point of a solution of the compound.

Identify the following statement as true or false and choose the correct explanation. "For solutions with the same reverse osmotic pressure at the same temperature, the molarity of a sodium chloride solution will always be less than the molarity of a calcium chloride solution."

Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  1018 J?

What information is provided by the van 't Hoff factor?

Which of the following compounds has the largest melting point?

Which of the following solutions, assuming equal volumes and a nonvolatile solute, would have the lowest boiling point?

A solution contains 6.50 mol water, 0.300 mol sucrose, and 0.200 mol glucose. The solutes are nonvolatile. What is the vapor pressure of the solution at 35C given that the vapor pressure of water is 42.2 torr?

Seawater can be characterized by the following average values. What is the molal concentration of ions in seawater? Explain how you arrived at your answer. density  1.022 g/mL total mass of ions  35.17 g/kg concentration of ions  1.15 M

Which of the following must be true if the dissolution of an ionic solid in water is exothermic?

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (Kb  3.63C/m)?

What is the boiling point of a 3.25 m KCl solution (Kb  0.52C/m for water)?

Which one of the ionic compounds below would you expect to have the smallest (least negative) lattice energy?

Which of the following will require the greatest energy input to separate the ions?

A solution is prepared by mixing 75 g of benzene (C6H6) with 25 g of toluene (C7H8). Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

What is the molality of a solution produced by dissolving 14.40 g of LiCl (42.39 g/mol) in water to make 0.104 L of solution with a density of 1.102 g/mL?

What is the molarity of a sucrose (C12H22O11) solution that produces an osmotic pressure of 2.65 atm at 25C?

Predict the relationship between the lattice energies (U) of KBr and CaO.

Which statement regarding osmotic pressure is not correct? Osmotic pressure ________

Which listing of ionic compounds is in order of increasing melting point?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

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Ion interaction energies are determined by Coulomb's law: Which of the following compounds has an interaction energy  3.83  10^¹⁸ J?

Cholesterol (386.7 g/mol) is a nonelectrolyte and a critical component of the cell membranes of animal cells. What would be the change in boiling point of a solution containing 1.23 g of cholesterol and 105 g of chloroform (K_b  3.63C/m)?

What is the boiling point of a 3.25 m KCl solution (K_b  0.52C/m for water)?

A solution is prepared by mixing 75 g of benzene (C₆H₆) with 25 g of toluene (C₇H₈). Use the following data to determine the vapor pressure of this solution at 20C. Substance Vapor Pressure at 20C (torr) Benzene 75 Toluene 22

What is the molarity of a sucrose (C₁₂H₂₂O₁₁) solution that produces an osmotic pressure of 2.65 atm at 25C?