A solution is made by dissolving 2.50 * 102 g of essentially nonvolatile ethylene glycol (C2H6O2) in 5.00 *102 g of water.What is the resulting freezing point of the solution? (Kf =1.86$\degree$C/m)

A) (-15.0$\degree$ C) B) (-4.33$\degree$ C) C) (-3.75$\degree$ C) D) (+3.75$\degree$ C) E) (+15.0$\degree$ C) A) (-15.0$\degree$ C) B) (-4.33$\degree$ C) C) (-3.75$\degree$ C) D) (+3.75$\degree$ C) E) (+15.0$\degree$ C)

Calculate the molality of a solution containing 0.755 mol of glucose (C6H12O6) and 1750 g of water.

A) 0.875 m B) 0.583 m C) 0.431 m D) 580 m E) 0.850 m A) 0.875 m B) 0.583 m C) 0.431 m D) 580 m E) 0.850 m

A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.42 g of acetonitrile (CH3CN, 41.06 g/mol).What is the vapor pressure of the solution at 25 $\degree$C?

A) 3.57* 102 torr B) 2.50 * 102 torr C) 2.14 *102 torr D) 1.97 * 102 torr E) 8.95 *101 torr A) 3.57* 102 torr B) 2.50 * 102 torr C) 2.14 *102 torr D) 1.97 * 102 torr E) 8.95 *101 torr

A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.43 g of acetonitrile (CH3CN, 41.06 g/mol).By what factor is the vapor phase enriched in CS2 at 25 $\degree$C?

A) 8.97 B) 1.67 C) 5.99 D) 3.99 E) 1.47 A) 8.97 B) 1.67 C) 5.99 D) 3.99 E) 1.47

Exam 11: Properties of Solutions Their Concentrations and Colligative Properties

The normal temperature range of the liquid phase of pure water is 0 $\degree$ C to 100 $\degree$ C.Which of the following solutions will have the largest temperature range for the liquid state?

(Multiple Choice)

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Question 41

What is the molality of a 5.32 M NaCl aqueous solution that has a density of 1.197 g/mL at 20.0 $\degree$ C?

(Short Answer)

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Question 42

A solution is made by dissolving 2.50 * 10² g of essentially nonvolatile ethylene glycol (C₂H₆O₂) in 5.00 *10² g of water.What is the resulting freezing point of the solution? (K_f =1.86 $\degree$ C/m)

(Multiple Choice)

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Question 43

Thiophene, C₄H₄S, is a fairly volatile liquid with a vapor pressure of 40.0 torr at 12.5 $\degree$ C, and its normal boiling point is 84.0 $\degree$ C.Calculate an estimate of thiophene's enthalpy of vaporization in kJ/mol.

(Multiple Choice)

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Question 44

Which statement regarding osmotic pressure is NOT correct? Osmotic pressure

(Multiple Choice)

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Question 45

Calculate the molality of a solution containing 0.755 mol of glucose (C₆H₁₂O₆) and 1750 g of water.

(Multiple Choice)

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Question 46

Pyridine, C₅H₅N, has a normal boiling point of 115.4 $\degree$ C.If the vapor pressure of pyridine is 40.0 torr at 38.0 $\degree$ C, calculate the molar enthalpy of vaporization, $\Delta$ H_vap, in kJ/mol at 38.0 $\degree$ C.

(Short Answer)

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Question 47

A solution is prepared by mixing 45.68 g of carbon disulfide (CS₂, 76.13 g/mol) with 16.42 g of acetonitrile (CH₃CN, 41.06 g/mol).What is the vapor pressure of the solution at 25 $\degree$ C? $A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.42 g of acetonitrile (CH3CN, 41.06 g/mol).What is the vapor pressure of the solution at 25 \degree C?$

(Multiple Choice)

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Question 48

Which statement below regarding evaporation is NOT correct?

(Multiple Choice)

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Question 49

Describe the dynamic equilibrium between evaporation and condensation that is established when a liquid is in a closed container.

(Essay)

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Question 50

A 75.0 mg sample of a natural product isolated from alfalfa hay was dissolved in water to make 100.0 mL of solution.The solution did not conduct electricity and had an osmotic pressure of 0.246 atm at 27.0 $\degree$ C.What is the molar mass of this compound?

(Short Answer)

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Question 51

A solution is prepared by mixing 45.68 g of carbon disulfide (CS₂, 76.13 g/mol) with 16.43 g of acetonitrile (CH₃CN, 41.06 g/mol).By what factor is the vapor phase enriched in CS₂ at 25 $\degree$ C? $A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.43 g of acetonitrile (CH3CN, 41.06 g/mol).By what factor is the vapor phase enriched in CS2 at 25 \degree C?$

(Multiple Choice)

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Question 52

A solution is prepared by dissolving 0.330 mol of sodium chloride (NaCl, 58.44 g/mol) in 0.2500 kg of water.How many grams of the solution contain 0.133 mol of NaCl?

(Multiple Choice)

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Question 53

Which of the following would be most effective in melting ice on a sidewalk?

(Multiple Choice)

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Question 54

The molal concentration of ions in seawater is 1.17 m, and the molar concentration is 1.15 M.What is the minimum pressure that must be applied to produce pure water from seawater through reverse osmosis at 25 $\degree$ C?

(Short Answer)

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Question 55

You must mix 168 g of carbon disulfide (CS₂, 76.13 g/mol) with acetonitrile (CH₃CN, 41.06 g/mol) to create a solution that has a total vapor pressure of 292 torr at 25 $\degree$ C.Calculate the number of grams of CH₃CN required. $You must mix 168 g of carbon disulfide (CS2, 76.13 g/mol) with acetonitrile (CH3CN, 41.06 g/mol) to create a solution that has a total vapor pressure of 292 torr at 25 \degree C.Calculate the number of grams of CH3CN required.$

(Multiple Choice)

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Question 56

Water at 25.0 $\degree$ C exposed to air at 1.00 atm pressure can contain a maximum of 13.7 mg/L of nitrogen gas.Calculate the value of Henry's law constant (mol/L . atm) for nitrogen at this temperature.The mole fraction of nitrogen in air is 0.78084.

(Short Answer)

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Question 57

Which of the following pairs of liquids probably exhibits positive deviations from Raoult's law when mixed?

(Multiple Choice)

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Question 58

Which statement below regarding vapor pressure is NOT correct?

(Multiple Choice)

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Question 59

A bottle is half filled with a mixture of 25% liquid heptane and 75% liquid octane by moles at 25 $\degree$ C.What is the mole ratio of heptane to octane in the space above the liquid compared to in the liquid? The vapor pressures are 31 torr for heptane and 11 torr for octane.

(Essay)

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Question 60

Showing 41 - 60 of 130

The normal temperature range of the liquid phase of pure water is 0 $\degree$ C to 100 $\degree$ C.Which of the following solutions will have the largest temperature range for the liquid state?

What is the molality of a 5.32 M NaCl aqueous solution that has a density of 1.197 g/mL at 20.0 $\degree$ C?

A solution is made by dissolving 2.50 * 10² g of essentially nonvolatile ethylene glycol (C₂H₆O₂) in 5.00 *10² g of water.What is the resulting freezing point of the solution? (K_f =1.86 $\degree$ C/m)

Thiophene, C₄H₄S, is a fairly volatile liquid with a vapor pressure of 40.0 torr at 12.5 $\degree$ C, and its normal boiling point is 84.0 $\degree$ C.Calculate an estimate of thiophene's enthalpy of vaporization in kJ/mol.

Which statement regarding osmotic pressure is NOT correct? Osmotic pressure

Calculate the molality of a solution containing 0.755 mol of glucose (C₆H₁₂O₆) and 1750 g of water.

Pyridine, C₅H₅N, has a normal boiling point of 115.4 $\degree$ C.If the vapor pressure of pyridine is 40.0 torr at 38.0 $\degree$ C, calculate the molar enthalpy of vaporization, $\Delta$ H_vap, in kJ/mol at 38.0 $\degree$ C.

Which statement below regarding evaporation is NOT correct?

Describe the dynamic equilibrium between evaporation and condensation that is established when a liquid is in a closed container.

A 75.0 mg sample of a natural product isolated from alfalfa hay was dissolved in water to make 100.0 mL of solution.The solution did not conduct electricity and had an osmotic pressure of 0.246 atm at 27.0 $\degree$ C.What is the molar mass of this compound?

A solution is prepared by dissolving 0.330 mol of sodium chloride (NaCl, 58.44 g/mol) in 0.2500 kg of water.How many grams of the solution contain 0.133 mol of NaCl?

Which of the following would be most effective in melting ice on a sidewalk?

The molal concentration of ions in seawater is 1.17 m, and the molar concentration is 1.15 M.What is the minimum pressure that must be applied to produce pure water from seawater through reverse osmosis at 25 $\degree$ C?

Water at 25.0 $\degree$ C exposed to air at 1.00 atm pressure can contain a maximum of 13.7 mg/L of nitrogen gas.Calculate the value of Henry's law constant (mol/L . atm) for nitrogen at this temperature.The mole fraction of nitrogen in air is 0.78084.

Which of the following pairs of liquids probably exhibits positive deviations from Raoult's law when mixed?

Which statement below regarding vapor pressure is NOT correct?

A bottle is half filled with a mixture of 25% liquid heptane and 75% liquid octane by moles at 25 $\degree$ C.What is the mole ratio of heptane to octane in the space above the liquid compared to in the liquid? The vapor pressures are 31 torr for heptane and 11 torr for octane.

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

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Exam 11: Properties of Solutions Their Concentrations and Colligative Properties

The normal temperature range of the liquid phase of pure water is 0 °\degree° C to 100 °\degree° C.Which of the following solutions will have the largest temperature range for the liquid state?

What is the molality of a 5.32 M NaCl aqueous solution that has a density of 1.197 g/mL at 20.0 °\degree° C?

A solution is made by dissolving 2.50 * 102 g of essentially nonvolatile ethylene glycol (C2H6O2) in 5.00 *102 g of water.What is the resulting freezing point of the solution? (Kf =1.86 °\degree° C/m)

Thiophene, C4H4S, is a fairly volatile liquid with a vapor pressure of 40.0 torr at 12.5 °\degree° C, and its normal boiling point is 84.0 °\degree° C.Calculate an estimate of thiophene's enthalpy of vaporization in kJ/mol.

Which statement regarding osmotic pressure is NOT correct? Osmotic pressure

Calculate the molality of a solution containing 0.755 mol of glucose (C6H12O6) and 1750 g of water.

Pyridine, C5H5N, has a normal boiling point of 115.4 °\degree° C.If the vapor pressure of pyridine is 40.0 torr at 38.0 °\degree° C, calculate the molar enthalpy of vaporization, Δ\DeltaΔ Hvap, in kJ/mol at 38.0 °\degree° C.

A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.42 g of acetonitrile (CH3CN, 41.06 g/mol).What is the vapor pressure of the solution at 25 °\degree° C?

Which statement below regarding evaporation is NOT correct?

Describe the dynamic equilibrium between evaporation and condensation that is established when a liquid is in a closed container.

A 75.0 mg sample of a natural product isolated from alfalfa hay was dissolved in water to make 100.0 mL of solution.The solution did not conduct electricity and had an osmotic pressure of 0.246 atm at 27.0 °\degree° C.What is the molar mass of this compound?

A solution is prepared by mixing 45.68 g of carbon disulfide (CS2, 76.13 g/mol) with 16.43 g of acetonitrile (CH3CN, 41.06 g/mol).By what factor is the vapor phase enriched in CS2 at 25 °\degree° C?

A solution is prepared by dissolving 0.330 mol of sodium chloride (NaCl, 58.44 g/mol) in 0.2500 kg of water.How many grams of the solution contain 0.133 mol of NaCl?

Which of the following would be most effective in melting ice on a sidewalk?

The molal concentration of ions in seawater is 1.17 m, and the molar concentration is 1.15 M.What is the minimum pressure that must be applied to produce pure water from seawater through reverse osmosis at 25 °\degree° C?

You must mix 168 g of carbon disulfide (CS2, 76.13 g/mol) with acetonitrile (CH3CN, 41.06 g/mol) to create a solution that has a total vapor pressure of 292 torr at 25 °\degree° C.Calculate the number of grams of CH3CN required.

Water at 25.0 °\degree° C exposed to air at 1.00 atm pressure can contain a maximum of 13.7 mg/L of nitrogen gas.Calculate the value of Henry's law constant (mol/L . atm) for nitrogen at this temperature.The mole fraction of nitrogen in air is 0.78084.

Which of the following pairs of liquids probably exhibits positive deviations from Raoult's law when mixed?

Which statement below regarding vapor pressure is NOT correct?

A bottle is half filled with a mixture of 25% liquid heptane and 75% liquid octane by moles at 25 °\degree° C.What is the mole ratio of heptane to octane in the space above the liquid compared to in the liquid? The vapor pressures are 31 torr for heptane and 11 torr for octane.

Matter and Energy an Atomic Perspective

Atoms, Ions, and Molecules the Building Blocks of Matter

Atomic Structure Explaining the Properties of Elements

Chemical Bonding Understanding Climate Change

Bonding Theories Explaining Molecular Geometry

Intermolecular Forces Attractions Between Particles

Stoichiometry Mass Relationships and Chemical Reactions

Aqueous Solutions Chemistry of the Hydrosphere

Thermochemistry Energy Changes in Chemical Reactions

Properties of Gases the Air We Breathe

Thermodynamics Why Chemical Reactions Happen

Chemical Kinetics Clearing the Air

Chemical Equilibrium Equal but Opposite Reaction Rates

Acid-Base Equilibria Proton Transfer in Biological Systems

Additional Aqueous Equilibria Chemistry and the Oceans

Electrochemistry the Quest for Clean Energy

The Solid State a Particulate View

Organic Chemistry Fuels, Pharmaceuticals, and Modern Materials

Biochemistry the Compounds of Life

Nuclear Chemistry the Risks and Benefits

The Main Group Elements Life and the Periodic Table

Transition Metals Biological and Medical Applications

Filters

The normal temperature range of the liquid phase of pure water is 0 $\degree$ C to 100 $\degree$ C.Which of the following solutions will have the largest temperature range for the liquid state?

What is the molality of a 5.32 M NaCl aqueous solution that has a density of 1.197 g/mL at 20.0 $\degree$ C?

A solution is made by dissolving 2.50 * 10² g of essentially nonvolatile ethylene glycol (C₂H₆O₂) in 5.00 *10² g of water.What is the resulting freezing point of the solution? (K_f =1.86 $\degree$ C/m)

Thiophene, C₄H₄S, is a fairly volatile liquid with a vapor pressure of 40.0 torr at 12.5 $\degree$ C, and its normal boiling point is 84.0 $\degree$ C.Calculate an estimate of thiophene's enthalpy of vaporization in kJ/mol.

Calculate the molality of a solution containing 0.755 mol of glucose (C₆H₁₂O₆) and 1750 g of water.

Pyridine, C₅H₅N, has a normal boiling point of 115.4 $\degree$ C.If the vapor pressure of pyridine is 40.0 torr at 38.0 $\degree$ C, calculate the molar enthalpy of vaporization, $\Delta$ H_vap, in kJ/mol at 38.0 $\degree$ C.

A 75.0 mg sample of a natural product isolated from alfalfa hay was dissolved in water to make 100.0 mL of solution.The solution did not conduct electricity and had an osmotic pressure of 0.246 atm at 27.0 $\degree$ C.What is the molar mass of this compound?

The molal concentration of ions in seawater is 1.17 m, and the molar concentration is 1.15 M.What is the minimum pressure that must be applied to produce pure water from seawater through reverse osmosis at 25 $\degree$ C?

Water at 25.0 $\degree$ C exposed to air at 1.00 atm pressure can contain a maximum of 13.7 mg/L of nitrogen gas.Calculate the value of Henry's law constant (mol/L . atm) for nitrogen at this temperature.The mole fraction of nitrogen in air is 0.78084.

A bottle is half filled with a mixture of 25% liquid heptane and 75% liquid octane by moles at 25 $\degree$ C.What is the mole ratio of heptane to octane in the space above the liquid compared to in the liquid? The vapor pressures are 31 torr for heptane and 11 torr for octane.