For the following gas-aqueous liquid equilibrium for a closed system at a constant temperature, N2(g) D N2(aq) What is the effect on the equilibrium composition of the liquid when the partial pressure of N2 gas above the liquid is decreased?

A) The amount of N2 dissolved in the liquid decreases. B) The amount of N2 dissolved in the liquid increases. C) The amount of N2 dissolved in the liquid does not change. D) Not enough information is provided to answer the question. E) Either A or B is possible. A) The amount of N2 dissolved in the liquid decreases. B) The amount of N2 dissolved in the liquid increases. C) The amount of N2 dissolved in the liquid does not change. D) Not enough information is provided to answer the question. E) Either A or B is possible.

If 27.9 g LiCl is dissolved in 175 g H2O,what is the weight percent of LiCl in the solution?

A) 0.376% B) 6.78% C) 13.8% D) 15.9% E) 19.0% A) 0.376% B) 6.78% C) 13.8% D) 15.9% E) 19.0%

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.50 g of the nonvolatile solute urea,CO(NH2)2,to 22.7 g of methanol,CH3OH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg.

A) 8.51 mmHg B) 64.9 mmHg C) 74.3 mmHg D) 80.5 mmHg E) 24.1 mmHg A) 8.51 mmHg B) 64.9 mmHg C) 74.3 mmHg D) 80.5 mmHg E) 24.1 mmHg

If the concentration of sodium carbonate in water is 12.8 ppm,what is the molarity of Na2CO3(aq)? The molar mass of Na2CO3 is 106.0 g/mol.Assume the density of the solution is 1.00 g/mL.

A) 8.28 × 10-6 M B) 1.21 × 10-4 M C) 1.36 × 10-3 M D) 0.136 M E) 0.121 M A) 8.28 × 10-6 M B) 1.21 × 10-4 M C) 1.36 × 10-3 M D) 0.136 M E) 0.121 M

Exam 14: Solutions and Their Behavior

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A solution is prepared by dissolving 5.88 g of an unknown nonelectrolyte in enough water to make 0.355 L of solution.The osmotic pressure of the solution is 1.21 atm at 27 °C.What is the molar mass of the solute? (R = 0.08206 L⋅atm/mol⋅K)

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Question 61

For the following gas-aqueous liquid equilibrium for a closed system at a constant temperature, N₂(g) D N₂(aq) What is the effect on the equilibrium composition of the liquid when the partial pressure of N₂ gas above the liquid is decreased?

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Question 62

What is the definition of molality?

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Question 63

If an egg's shell is carefully dissolved using an acid,the egg white and yolk will remain intact inside a membrane.If the egg is then placed in distilled water,it will slowly expand until it bursts.Why?

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Question 64

A 3.0 g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 52.8 mL of water at 21°C.What is the osmotic pressure of the solution? (R = 0.0821 L · atm/K·mol,1 atm = 760 mmHg)

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Question 65

If a 15.6-g sample of a nonelectrolyte is dissolved in 100.0 g of water,the resulting solution will freeze at -0.93°C.What is the molar mass of the nonelectrolyte? (K_fp for water is 1.858°C/m.)

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Question 66

Which of the following favor(s)the solubility of an ionic solid in a liquid solvent?

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Question 67

If 27.9 g LiCl is dissolved in 175 g H₂O,what is the weight percent of LiCl in the solution?

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Question 68

What partial pressure of oxygen gas is required in order for 0.00284 g of the gas to dissolve in 15.9 mL of pure water? The Henry's law constant for oxygen gas is 1.3 × 10^-3 M atm^-1.

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Question 69

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.50 g of the nonvolatile solute urea,CO(NH₂)₂,to 22.7 g of methanol,CH₃OH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg.

(Multiple Choice)

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Question 70

A concentrated nitric acid solution has a density of 1.41 g/mL at 25°C and is 15.8 M.What is the percent by mass of HNO_{3 in the solution?}

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Question 71

Which of the following statements about soaps and detergents is false?

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Question 72

The solubility of 1-pentanol in water is 2.7 g per 100 g of water at 25°C.What is the maximum amount of 1-pentanol that will dissolve in 2.1 g of water at 25°C?

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Question 73

What is the boiling-point change for a solution containing 0.251 mol of naphthalene (a nonvolatile,nonionizing compound)in 250.g of liquid benzene? (K_bp = 2.53°C/m for benzene)

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Question 74

The vapor pressure of water at 90°C is 0.692 atm.What is the vapor pressure (in atm)of a solution made by dissolving 2.91 mole(s)of CsF(s)in 1.00 kg of water? Assume that Raoult's law applies.

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Question 75

If the concentration of sodium carbonate in water is 12.8 ppm,what is the molarity of Na₂CO₃(aq)? The molar mass of Na₂CO₃ is 106.0 g/mol.Assume the density of the solution is 1.00 g/mL.

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Question 76

Which of the following equations illustrates the formation of an aqueous solution of KF from its elements in their standard states?

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Question 77

Henry's law states that the solubility of a gas in a liquid is directly proportional to its pressure above the liquid.This law holds accurate for gases such as nitrogen and oxygen.However,Henry's law does not hold accurate for hydrogen chloride gas.Why?

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Question 78

Colloids represent a state intermediate between a solution and a suspension.

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Question 79

Showing 61 - 79 of 79

Exam 14: Solutions and Their Behavior

A solution is prepared by dissolving 5.88 g of an unknown nonelectrolyte in enough water to make 0.355 L of solution.The osmotic pressure of the solution is 1.21 atm at 27 °C.What is the molar mass of the solute? (R = 0.08206 L⋅atm/mol⋅K)

For the following gas-aqueous liquid equilibrium for a closed system at a constant temperature, N2(g) D N2(aq) What is the effect on the equilibrium composition of the liquid when the partial pressure of N2 gas above the liquid is decreased?

What is the definition of molality?

If an egg's shell is carefully dissolved using an acid,the egg white and yolk will remain intact inside a membrane.If the egg is then placed in distilled water,it will slowly expand until it bursts.Why?

A 3.0 g sample of a small protein having a molecular weight of 42,000 g/mol is dissolved in 52.8 mL of water at 21°C.What is the osmotic pressure of the solution? (R = 0.0821 L · atm/K·mol,1 atm = 760 mmHg)

If a 15.6-g sample of a nonelectrolyte is dissolved in 100.0 g of water,the resulting solution will freeze at -0.93°C.What is the molar mass of the nonelectrolyte? (Kfp for water is 1.858°C/m.)

Which of the following favor(s)the solubility of an ionic solid in a liquid solvent?

If 27.9 g LiCl is dissolved in 175 g H2O,what is the weight percent of LiCl in the solution?

What partial pressure of oxygen gas is required in order for 0.00284 g of the gas to dissolve in 15.9 mL of pure water? The Henry's law constant for oxygen gas is 1.3 × 10-3 M atm-1.

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.50 g of the nonvolatile solute urea,CO(NH2)2,to 22.7 g of methanol,CH3OH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg.

A concentrated nitric acid solution has a density of 1.41 g/mL at 25°C and is 15.8 M.What is the percent by mass of HNO3 in the solution?

Which of the following statements about soaps and detergents is false?

The solubility of 1-pentanol in water is 2.7 g per 100 g of water at 25°C.What is the maximum amount of 1-pentanol that will dissolve in 2.1 g of water at 25°C?

What is the boiling-point change for a solution containing 0.251 mol of naphthalene (a nonvolatile,nonionizing compound)in 250.g of liquid benzene? (Kbp = 2.53°C/m for benzene)

The vapor pressure of water at 90°C is 0.692 atm.What is the vapor pressure (in atm)of a solution made by dissolving 2.91 mole(s)of CsF(s)in 1.00 kg of water? Assume that Raoult's law applies.

If the concentration of sodium carbonate in water is 12.8 ppm,what is the molarity of Na2CO3(aq)? The molar mass of Na2CO3 is 106.0 g/mol.Assume the density of the solution is 1.00 g/mL.

Which of the following equations illustrates the formation of an aqueous solution of KF from its elements in their standard states?

Henry's law states that the solubility of a gas in a liquid is directly proportional to its pressure above the liquid.This law holds accurate for gases such as nitrogen and oxygen.However,Henry's law does not hold accurate for hydrogen chloride gas.Why?

Colloids represent a state intermediate between a solution and a suspension.

Basic Concepts of Chemistry

Lets Review: The Tools of Quantitative Chemistry

Atoms, molecules, and Ions

Chemical Reactions

Stoichiometry: Quantitative Information About Chemical Reactions

Principles of Chemical Reactivity: Energy and Chemical Reactions

The Structure of Atoms

The Structure of Atoms and Periodic Trends

Bonding and Molecular Structure

Bonding and Molecular Structure Orbital Hybridization and Molecular Orbitals

Gases and Their Properties

Intermolecular Forces and Liquids

The Solid State

Chemical Kinetics: the Rates of Chemical Reactions

Principles of Chemical Reactivity: Equilibria

Principles of Chemical Reactivity: the Chemistry of Acids and Bases

Principles of Chemical Reactivity: Other Aspects of Aqueous Equilibria

Principles of Chemical Reactivity: Entropy and Free Energy

Principles of Chemical Reactivity: Electron Transfer Reactions

Environmental Chemistry: Earths Environment, energy, and Sustainability

The Chemistry of the Main Group Elements

The Chemistry of the Transition Elements

Carbon: Not Just Another Element

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For the following gas-aqueous liquid equilibrium for a closed system at a constant temperature, N₂(g) D N₂(aq) What is the effect on the equilibrium composition of the liquid when the partial pressure of N₂ gas above the liquid is decreased?

If a 15.6-g sample of a nonelectrolyte is dissolved in 100.0 g of water,the resulting solution will freeze at -0.93°C.What is the molar mass of the nonelectrolyte? (K_fp for water is 1.858°C/m.)

If 27.9 g LiCl is dissolved in 175 g H₂O,what is the weight percent of LiCl in the solution?

What partial pressure of oxygen gas is required in order for 0.00284 g of the gas to dissolve in 15.9 mL of pure water? The Henry's law constant for oxygen gas is 1.3 × 10^-3 M atm^-1.

What is the vapor pressure at 20°C of an ideal solution prepared by the addition of 4.50 g of the nonvolatile solute urea,CO(NH₂)₂,to 22.7 g of methanol,CH₃OH? The vapor pressure of pure methanol at 20°C is 89.0 mmHg.

A concentrated nitric acid solution has a density of 1.41 g/mL at 25°C and is 15.8 M.What is the percent by mass of HNO_{3 in the solution?}

What is the boiling-point change for a solution containing 0.251 mol of naphthalene (a nonvolatile,nonionizing compound)in 250.g of liquid benzene? (K_bp = 2.53°C/m for benzene)

If the concentration of sodium carbonate in water is 12.8 ppm,what is the molarity of Na₂CO₃(aq)? The molar mass of Na₂CO₃ is 106.0 g/mol.Assume the density of the solution is 1.00 g/mL.