At moderate pressures (~ 200 atm), the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

A) such high pressures cannot be accurately measured. B) CO2 will condense to a liquid at 200 atm pressure. C) gas phase collisions prevent CO2 molecules from colliding with the walls of the container. D) of attractive intermolecular forces between CO2 molecules. E) the volume occupied by the CO2 molecules themselves becomes significant. A) such high pressures cannot be accurately measured. B) CO2 will condense to a liquid at 200 atm pressure. C) gas phase collisions prevent CO2 molecules from colliding with the walls of the container. D) of attractive intermolecular forces between CO2 molecules. E) the volume occupied by the CO2 molecules themselves becomes significant.

Linolenic acid (C18H30O2) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2 F1F1F1S1F1F1F10 C18H36O2 What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

A) 2.53 L B) 1.69 L C) 1.27 L D) 845 mL E) 422 mL A) 2.53 L B) 1.69 L C) 1.27 L D) 845 mL E) 422 mL

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

A) 4.59 × 105 Pa B) 4.59 × 103 Pa C) 4.59 × 101 Pa D) 4.59 × 10-1 Pa E) 4.59 × 10-3 Pa A) 4.59 × 105 Pa B) 4.59 × 103 Pa C) 4.59 × 101 Pa D) 4.59 × 10-1 Pa E) 4.59 × 10-3 Pa

Exam 5: Gases and the Kinetic-Molecular Theory

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 89.6 kPa in 5.25 L of water?

(Multiple Choice)

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Question 61

For real gases, PV > nRT, always.

(True/False)

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Question 62

The rate of diffusion of a gas is inversely proportional to its molar mass.

(True/False)

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Question 63

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C₆H₁₂O₆(aq)  2C₂H₅OH(aq) + 2CO₂(g)

(Short Answer)

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Question 64

A flask containing helium gas is connected to an open-ended mercury manometer. The open end is exposed to the atmosphere, where the prevailing pressure is 752 torr. The mercury level in the open arm is 26 mm above that in the arm connected to the flask of helium. What is the helium pressure, in torr?

(Multiple Choice)

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Question 65

At moderate pressures (~ 200 atm), the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

(Multiple Choice)

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Question 66

The ozone layer is important because

(Multiple Choice)

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Question 67

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

(Multiple Choice)

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Question 68

Linolenic acid (C₁₈H₃₀O₂) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C₁₈H₃₀O₂ + 3H₂  C₁₈H₃₆O₂ What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

(Multiple Choice)

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Question 69

A 1.30-L sample of argon gas is at 1.02 atm and 21.5°C. a. What mass of argon is in the container? b. If the temperature is raised to 500.0°C while the volume remains constant, calculate the new pressure, in atmospheres.

(Essay)

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Question 70

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)

(Multiple Choice)

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Question 71

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?

(Short Answer)

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Question 72

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (P_water = 24 torr at 25°C)

(Multiple Choice)

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Question 73

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

(Multiple Choice)

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Question 74

State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

(Essay)

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Question 75

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

(Multiple Choice)

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Question 76

"The pressure of an ideal gas is directly proportional to its absolute temperature at constant volume and number of moles" is a statement of ________________ Law.

(Multiple Choice)

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Question 77

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas?

(Multiple Choice)

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Question 78

A sample of methane gas, CH₄(g), occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

(Multiple Choice)

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Question 79

The air pressure in a volleyball is 75 psi. What is this pressure in torr?

(Multiple Choice)

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Question 80

Showing 61 - 80 of 115

Exam 5: Gases and the Kinetic-Molecular Theory

Hydrochloric acid is prepared by bubbling hydrogen chloride gas through water. What is the concentration of a solution prepared by dissolving 225 L of HCl(g) at 37°C and 89.6 kPa in 5.25 L of water?

For real gases, PV > nRT, always.

The rate of diffusion of a gas is inversely proportional to its molar mass.

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C6H12O6(aq)  2C2H5OH(aq) + 2CO2(g)

At moderate pressures (~ 200 atm), the measured pressure exerted by CO2 gas is less than that predicted by the ideal gas equation. This is mainly because

The ozone layer is important because

A carbon dioxide sample weighing 44.0 g occupies 32.68 L at 65°C and 645 torr. What is its volume at STP?

Linolenic acid (C18H30O2) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C18H30O2 + 3H2  C18H36O2 What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

A 1.30-L sample of argon gas is at 1.02 atm and 21.5°C. a. What mass of argon is in the container? b. If the temperature is raised to 500.0°C while the volume remains constant, calculate the new pressure, in atmospheres.

Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure of an oxygen sample in mm of mineral oil if its pressure is 28.5 mm Hg? (d of mineral oil = 0.88 g/mL; d of Hg = 13.5 g/mL)

Which of the lines on the figure below is the best representation of the relationship between the volume of a gas and its Celsius temperature, other factors remaining constant?

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (Pwater = 24 torr at 25°C)

Helium gas is being pumped into a rigid container at a constant temperature. As a result, the pressure of helium in the container is increasing. Select the one correct statement below.

State Charles's Law and illustrate it with a graph, using standard x-y coordinate axes. Be sure to label the axes unambiguously with the correct gas variables.

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm2 of her slippers in contact with the floor. What pressure is she exerting on the floor?

"The pressure of an ideal gas is directly proportional to its absolute temperature at constant volume and number of moles" is a statement of ________________ Law.

A flask with a volume of 3.16 L contains 9.33 grams of an unknown gas at 32.0°C and 1.00 atm. What is the molar mass of the gas?

A sample of methane gas, CH4(g), occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?

The air pressure in a volleyball is 75 psi. What is this pressure in torr?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

In the fermentation process, yeast converts glucose to ethanol and carbon dioxide. What volume of carbon dioxide, measured at 745 torr and 25.0°C, can be produced by the fermentation of 10.0 g of glucose? C₆H₁₂O₆(aq)  2C₂H₅OH(aq) + 2CO₂(g)

At moderate pressures (~ 200 atm), the measured pressure exerted by CO₂ gas is less than that predicted by the ideal gas equation. This is mainly because

Linolenic acid (C₁₈H₃₀O₂) can be hydrogenated to stearic acid by reacting it with hydrogen gas according to the equation: C₁₈H₃₀O₂ + 3H₂  C₁₈H₃₆O₂ What volume of hydrogen gas, measured at STP, is required to react with 10.5 g of linolenic acid in this reaction?

Hydrogen peroxide was catalytically decomposed and 75.3 mL of oxygen gas was collected over water at 25°C and 742 torr. What mass of oxygen was collected? (P_water = 24 torr at 25°C)

A ballerina weighs 103 lbs and is up on her toes with only 10.0 cm² of her slippers in contact with the floor. What pressure is she exerting on the floor?

A sample of methane gas, CH₄(g), occupies a volume of 60.3 L at a pressure of 469 torr and a temperature of 29.3°C. What would be its temperature at a pressure of 243 torr and volume of 60.3 L?