What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane, C6H14?

A) 0.0715 B) 0.0770 C) 0.133 D) 0.154 A) 0.0715 B) 0.0770 C) 0.133 D) 0.154

Match the following. -0.050 mol kg-1 C6H12O6 (aqueous)

A) largest van't Hoff factor B) solution that is most strongly dependent upon pressure C) solution of ionic compound with highest freezing point. D) highest boiling point E) solution with ΔTb = 0.026 °C A) largest van't Hoff factor B) solution that is most strongly dependent upon pressure C) solution of ionic compound with highest freezing point. D) highest boiling point E) solution with ΔTb = 0.026 °C

A solution is prepared by dissolving 16.2 g of benzene (C6H6)in 282 g of carbon tetrachloride (CCl4)The concentration of benzene in this solution is ________ molal. The molar masses of C6H6 and CCl4 are 78.1 g mol-1 and 154 g mol-1, respectively.

A) 7.36 × 10-4 B) 0.736 C) 0.102 D) 0.0543 E) 5.43 A) 7.36 × 10-4 B) 0.736 C) 0.102 D) 0.0543 E) 5.43

A solution is 2.25% by weight NaHCO3. How many grams of NaHCO3 are in 150.0 g of solution?

A) 1.50 g B) 3.38 g C) 66.7 g D) 225 g A) 1.50 g B) 3.38 g C) 66.7 g D) 225 g

Exam 12: Solutions

A nonelectrolyte compound with a molar mass of 862 g mol^-1 was dissolved in enough water to make 100 mL of solution at 25 °C and produced an osmotic pressure of 38.4 mbar. Calculate the mass of the compound, in mg, used to make this solution.

(Multiple Choice)

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Question 21

Identify the classification of whipped cream.

(Multiple Choice)

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Question 22

Equal masses, 5.00 g, of pentane (C₅H₁₂)and hexane (C₆H₁₄)are mixed. Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

(Multiple Choice)

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Question 23

An unknown nonelectrolyte and nonvolatile compound is dissolved in enough pure water to make 229 mL of solution. The vapour pressure above the solution drops from 233.7 Torr to 229.1 Torr when 82.3 g of the compound is dissolved at constant temperature. Determine the molar mass of the unknown compound. Assume no change in volume occurs upon dissolution.

(Multiple Choice)

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Question 24

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane, C₆H₁₄?

(Multiple Choice)

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Question 25

Match the following. -0.050 mol kg^-1 C₆H₁₂O₆(aqueous)

(Multiple Choice)

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Question 26

An aqueous solution is 0.387 mol L^-1 in HCl. What is the molality of the solution if the density is 1.23 g mL^-1?

(Multiple Choice)

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Question 27

A solution is prepared by dissolving 16.2 g of benzene (C₆H₆)in 282 g of carbon tetrachloride (CCl₄)The concentration of benzene in this solution is ________ molal. The molar masses of C₆H₆ and CCl₄ are 78.1 g mol^-1 and 154 g mol^-1, respectively.

(Multiple Choice)

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Question 28

A solution is 2.25% by weight NaHCO₃. How many grams of NaHCO₃ are in 150.0 g of solution?

(Multiple Choice)

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Question 29

Identify the compound whose solubility decreases with increasing temperature.

(Multiple Choice)

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Question 30

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

(Multiple Choice)

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Question 31

Which of the following ions should have the most exothermic Δ_hydrationH?

(Multiple Choice)

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Question 32

To make a 0.500 mol L^-1 solution, one could take 0.500 moles of solute and add

(Multiple Choice)

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Question 33

What happens to a supersaturated solution of potassium acetate once it is cooled and a small crystal of solid potassium acetate is added?

(Essay)

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Question 34

A small amount, 6.78 g, of pentane (C₅H₁₂)is mixed with 100.00 g hexane (C₆H₁₄). Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

(Multiple Choice)

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Question 35

Which of the following statements is TRUE?

(Multiple Choice)

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Question 36

Explain why water does not dissolve in gasoline.

(Short Answer)

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Question 37

A compound is found to have a molar mass of 598 g mol^-1. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25 °C, what is the osmotic pressure of the resulting solution?

(Multiple Choice)

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Question 38

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H₂O.

(Multiple Choice)

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Question 39

Choose the situation below that would result in a Δ_solutionH near 0.

(Multiple Choice)

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Question 40

Showing 21 - 40 of 159

Exam 12: Solutions

A nonelectrolyte compound with a molar mass of 862 g mol-1 was dissolved in enough water to make 100 mL of solution at 25 °C and produced an osmotic pressure of 38.4 mbar. Calculate the mass of the compound, in mg, used to make this solution.

Identify the classification of whipped cream.

Equal masses, 5.00 g, of pentane (C5H12)and hexane (C6H14)are mixed. Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

What is the mole fraction of I2 in a solution made by dissolving 55.6 g of I2 in 245 g of hexane, C6H14?

Match the following. -0.050 mol kg-1 C6H12O6 (aqueous)

An aqueous solution is 0.387 mol L-1 in HCl. What is the molality of the solution if the density is 1.23 g mL-1?

A solution is prepared by dissolving 16.2 g of benzene (C6H6)in 282 g of carbon tetrachloride (CCl4)The concentration of benzene in this solution is ________ molal. The molar masses of C6H6 and CCl4 are 78.1 g mol-1 and 154 g mol-1, respectively.

A solution is 2.25% by weight NaHCO3. How many grams of NaHCO3 are in 150.0 g of solution?

Identify the compound whose solubility decreases with increasing temperature.

What is the mole fraction of oxygen in a gas mixture that is 37% oxygen and 63% nitrogen by volume?

Which of the following ions should have the most exothermic ΔhydrationH?

To make a 0.500 mol L-1 solution, one could take 0.500 moles of solute and add

What happens to a supersaturated solution of potassium acetate once it is cooled and a small crystal of solid potassium acetate is added?

A small amount, 6.78 g, of pentane (C5H12)is mixed with 100.00 g hexane (C6H14). Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

Which of the following statements is TRUE?

Explain why water does not dissolve in gasoline.

A compound is found to have a molar mass of 598 g mol-1. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25 °C, what is the osmotic pressure of the resulting solution?

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H2O.

Choose the situation below that would result in a ΔsolutionH near 0.

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A nonelectrolyte compound with a molar mass of 862 g mol^-1 was dissolved in enough water to make 100 mL of solution at 25 °C and produced an osmotic pressure of 38.4 mbar. Calculate the mass of the compound, in mg, used to make this solution.

Equal masses, 5.00 g, of pentane (C₅H₁₂)and hexane (C₆H₁₄)are mixed. Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

What is the mole fraction of I₂ in a solution made by dissolving 55.6 g of I₂ in 245 g of hexane, C₆H₁₄?

Match the following. -0.050 mol kg^-1 C₆H₁₂O₆(aqueous)

An aqueous solution is 0.387 mol L^-1 in HCl. What is the molality of the solution if the density is 1.23 g mL^-1?

A solution is prepared by dissolving 16.2 g of benzene (C₆H₆)in 282 g of carbon tetrachloride (CCl₄)The concentration of benzene in this solution is ________ molal. The molar masses of C₆H₆ and CCl₄ are 78.1 g mol^-1 and 154 g mol^-1, respectively.

A solution is 2.25% by weight NaHCO₃. How many grams of NaHCO₃ are in 150.0 g of solution?

Which of the following ions should have the most exothermic Δ_hydrationH?

To make a 0.500 mol L^-1 solution, one could take 0.500 moles of solute and add

A small amount, 6.78 g, of pentane (C₅H₁₂)is mixed with 100.00 g hexane (C₆H₁₄). Calculate the vapour pressure of the resulting solution. The vapour pressures of pure pentane and hexane are 425 Torr and 151 Torr, respectively. Assume ideal behaviour.

A compound is found to have a molar mass of 598 g mol^-1. If 35.8 mg of the compound is dissolved in enough water to make 175 mL of solution at 25 °C, what is the osmotic pressure of the resulting solution?

Determine the molality of an aqueous solution prepared by dissolving 0.112 moles of LiCl in 13.7 moles of H₂O.

Choose the situation below that would result in a Δ_solutionH near 0.