Fresh air contains approximately 400 ppm CO2,whereas the breath of an intoxicated person contains about 4 percent CO2.The amount of CO2 in the breath of an intoxicated person is ________ times the amount of CO2 in fresh air.

A) 10-2 B) 10-1 C) 101 D) 102 A) 10-2 B) 10-1 C) 101 D) 102

How much water must be added to 42.0 g of CaCl2 to produce a solution that is 40.0 wt% CaCl2?

A) 56.7 g B) 63.0 g C) 16.8 g D) 120 g A) 56.7 g B) 63.0 g C) 16.8 g D) 120 g

Exam 12: Solutions and Their Properties

The Henry's Law constant of methyl bromide,CH₃Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 290.mm Hg?

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When a particular solid begins to dissolve in water,the temperature rises dramatically.For the dissolving of this solid in pure water

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Question 2

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A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = and decane (bp = 126°C)is shown. -Assume that you start with a mixture containing 0.80 mol of decane and 0.20 mol of octane,what is the vapor composition at the boiling point?

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Which concentration becomes smaller as the temperature is increased from 25°C to 60°C?

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Question 4

Fresh air contains approximately 400 ppm CO₂,whereas the breath of an intoxicated person contains about 4 percent CO₂.The amount of CO₂ in the breath of an intoxicated person is ________ times the amount of CO₂ in fresh air.

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Question 5

What is the mole fraction of oxygen in a gas mixture that is 40.0% oxygen and 60.0% nitrogen by volume?

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Question 6

Molality is defined as moles of solute per

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Question 7

A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = and decane (bp = 126°C)is shown. -Assume that the vapor at point c is condensed and reboiled.What is the liquid composition of the condensed vapor prior to reboiling?

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Question 8

The normal boiling point of pure benzene is found to be 80.10°C.What is the approximate molecular weight of a nonionizing substance if a solution of 3.55 g of the substance dissolved in 100.g of benzene has a normal boiling point of 80.19°C? K_b = 5.12°C/m for benzene,C₆H₆.

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Question 9

The rubbing alcohol sold in drug stores often is composed of 70% isopropyl alcohol and 30% water.In this solution

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Question 10

What is the mole fraction of ethanol in a solution made by dissolving 7.30 g of ethanol,C₂H₅OH,in 53.6 g of water?

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Question 11

When 2.36 g of a nonvolatile solute is dissolved in 100 g of solvent,the largest change in freezing point will be achieved when the solvent is

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Question 12

The osmotic pressure of a 0.10 M solution of sucrose,C₁₂H₂₂O₁₁will be ________ (equal to,greater than,less than)the osmotic pressure of a 0.10 M solution of fructose,C₆H₁₂O₆.

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Question 13

What volume of a 0.716 M KBr solution is needed to provide 10.5 g of KBr?

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Question 14

How much water must be added to 42.0 g of CaCl₂ to produce a solution that is 40.0 wt% CaCl₂?

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Question 15

Which of the following pairs of solutions have roughly the same boiling point elevation?

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Question 16

At 300 K a 500.0 mL solution containing 0.4314 g of dextrose has an osmotic pressure of 89.6 mm Hg.What is the molar mass of dextrose?

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Question 17

What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume?

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Question 18

How many grams of KBr are required to make 850.mL of a 0.115 M KBr solution?

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Question 19

Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm.At this level,how many grams of formaldehyde are permissible in a 6.0-L breath of air having a density of 1.2 kg/m³?

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Question 20

Showing 1 - 20 of 198

Exam 12: Solutions and Their Properties

The Henry's Law constant of methyl bromide,CH3Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 290.mm Hg?

When a particular solid begins to dissolve in water,the temperature rises dramatically.For the dissolving of this solid in pure water

A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = and decane (bp = 126°C)is shown. -Assume that you start with a mixture containing 0.80 mol of decane and 0.20 mol of octane,what is the vapor composition at the boiling point?

Which concentration becomes smaller as the temperature is increased from 25°C to 60°C?

Fresh air contains approximately 400 ppm CO2,whereas the breath of an intoxicated person contains about 4 percent CO2.The amount of CO2 in the breath of an intoxicated person is ________ times the amount of CO2 in fresh air.

What is the mole fraction of oxygen in a gas mixture that is 40.0% oxygen and 60.0% nitrogen by volume?

Molality is defined as moles of solute per

A phase diagram of temperature versus composition for a mixture of the two volatile liquids octane (bp = and decane (bp = 126°C)is shown. -Assume that the vapor at point c is condensed and reboiled.What is the liquid composition of the condensed vapor prior to reboiling?

The normal boiling point of pure benzene is found to be 80.10°C.What is the approximate molecular weight of a nonionizing substance if a solution of 3.55 g of the substance dissolved in 100.g of benzene has a normal boiling point of 80.19°C? Kb = 5.12°C/m for benzene,C6H6.

The rubbing alcohol sold in drug stores often is composed of 70% isopropyl alcohol and 30% water.In this solution

What is the mole fraction of ethanol in a solution made by dissolving 7.30 g of ethanol,C2H5OH,in 53.6 g of water?

When 2.36 g of a nonvolatile solute is dissolved in 100 g of solvent,the largest change in freezing point will be achieved when the solvent is

The osmotic pressure of a 0.10 M solution of sucrose,C12H22O11 will be ________ (equal to,greater than,less than)the osmotic pressure of a 0.10 M solution of fructose,C6H12O6.

What volume of a 0.716 M KBr solution is needed to provide 10.5 g of KBr?

How much water must be added to 42.0 g of CaCl2 to produce a solution that is 40.0 wt% CaCl2?

Which of the following pairs of solutions have roughly the same boiling point elevation?

At 300 K a 500.0 mL solution containing 0.4314 g of dextrose has an osmotic pressure of 89.6 mm Hg.What is the molar mass of dextrose?

What is the mole fraction of oxygen in a gas mixture that is 27% oxygen and 73% nitrogen by volume?

How many grams of KBr are required to make 850.mL of a 0.115 M KBr solution?

Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm.At this level,how many grams of formaldehyde are permissible in a 6.0-L breath of air having a density of 1.2 kg/m3?

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The Henry's Law constant of methyl bromide,CH₃Br,is k = 0.159 mol/(L ∙ atm)at 25°C.What is the solubility of methyl bromide in water at 25°C and at a partial pressure of 290.mm Hg?

Fresh air contains approximately 400 ppm CO₂,whereas the breath of an intoxicated person contains about 4 percent CO₂.The amount of CO₂ in the breath of an intoxicated person is ________ times the amount of CO₂ in fresh air.

The normal boiling point of pure benzene is found to be 80.10°C.What is the approximate molecular weight of a nonionizing substance if a solution of 3.55 g of the substance dissolved in 100.g of benzene has a normal boiling point of 80.19°C? K_b = 5.12°C/m for benzene,C₆H₆.

What is the mole fraction of ethanol in a solution made by dissolving 7.30 g of ethanol,C₂H₅OH,in 53.6 g of water?

The osmotic pressure of a 0.10 M solution of sucrose,C₁₂H₂₂O₁₁will be ________ (equal to,greater than,less than)the osmotic pressure of a 0.10 M solution of fructose,C₆H₁₂O₆.

How much water must be added to 42.0 g of CaCl₂ to produce a solution that is 40.0 wt% CaCl₂?

Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm.At this level,how many grams of formaldehyde are permissible in a 6.0-L breath of air having a density of 1.2 kg/m³?