A gas mixture has partial pressures of 120 torr N2, 350 torr Ar, and 480 torr SF6. What is the mole fraction of sulfur hexafluoride in the mixture?

A) 0.13 B) 0.37 C) 0.45 D) 0.51 E) 0.55 A) 0.13 B) 0.37 C) 0.45 D) 0.51 E) 0.55 D

What is the density of propane gas (CH3CH2CH3, 44.1 g/mol) at 25F1F1F1S1F1F1F10C and 650 mm Hg?

A) 1.54 g/L B) 3.55 g/mL C) 18.3 g/L D) 2.05 g/L E) 1.17 g/L A) 1.54 g/L B) 3.55 g/mL C) 18.3 g/L D) 2.05 g/L E) 1.17 g/L A

In the presence of a catalyst, potassium chlorate decomposes and provides a very simple way to generate oxygen via the following decomposition reaction: 2KClO3(s) F1F1F1S1F1F1F103O2(g) F1F1F1S1F1F1F102KCl(s) How many grams of potassium chlorate are needed to produce 38.2 L of oxygen gas at a pressure of 2.00 atm at a temperature of 310 K?

A) 10.7 g B) 245 g C) 157 g D) 423 g E) 61.7 g A) 10.7 g B) 245 g C) 157 g D) 423 g E) 61.7 g

In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39F1F1F1S1F1F1F10C. What pressure does the gas exert if it is assumed to be ideal?

A) 5.5 F1F1F1S1F1F1F10atm B) 2.9 F1F1F1S1F1F1F10atm C) 6.9 atm D) 55 atm E) 96 atm A) 5.5 F1F1F1S1F1F1F10atm B) 2.9 F1F1F1S1F1F1F10atm C) 6.9 atm D) 55 atm E) 96 atm

Which one of these samples contains the smallest number of particles (atoms or molecules)? Explain your logic. 1.0 L of H2 at STP (0F1F1F1S1F1F1F10C and 1 atm) 1.0 L of N2 at STP 1.0 L of H2 at 20F1F1F1S1F1F1F10C and 760 torr 1.0 L of N2 at 0F1F1F1S1F1F1F10C and 800 torr 1.0 L of He at STP

1.0 L of H 2 at 20F1F1F1S1F1F1F10C and 76

What is the temperature of a sample of ozone (O3) with an average kinetic energy of 1.73 kJ/mol?

A) 10 K B) 270 K C) 139 K D) 280 K E) 79 K A) 10 K B) 270 K C) 139 K D) 280 K E) 79 K

A sample of gas at 4.0 atm and 25.0 mL is heated from 25F1F1F1S1F1F1F10C to 40F1F1F1S1F1F1F10C. If the pressure remains constant, what is the final volume of the gas?

A) 26.2 mL B) 40.0 mL C) 23.8 mL D) 105 mL E) 25.0 mL A) 26.2 mL B) 40.0 mL C) 23.8 mL D) 105 mL E) 25.0 mL

Exam 6: Properties of Gases: The Air We Breathe

A 5 L diving tank is filled to a pressure of 45 atm with He, and then is topped off with O₂ to a total pressure of 50 atm. What is the mole fraction of oxygen in the tank?

Free

(Short Answer)

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Question 1

Correct Answer:

Verified

0.10

A gas mixture has partial pressures of 120 torr N₂, 350 torr Ar, and 480 torr SF₆. What is the mole fraction of sulfur hexafluoride in the mixture?

Free

(Multiple Choice)

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Question 2

Correct Answer:

Verified

What is the density of propane gas (CH₃CH₂CH₃, 44.1 g/mol) at 25C and 650 mm Hg?

Free

(Multiple Choice)

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Question 3

Correct Answer:

Verified

The van der Waals equation for real gases contains an a parameter and a b parameter. Which statement about these parameters is not correct?

(Multiple Choice)

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Question 4

When a certain acid and a certain base are mixed together, a reaction occurs that produces a gas as one of the products. The gas has a density of 2.62 g/L at 1.47 atm and 27C. What are the molar mass and identity of the gas?

(Multiple Choice)

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Question 5

In the presence of a catalyst, potassium chlorate decomposes and provides a very simple way to generate oxygen via the following decomposition reaction: 2KClO₃(s) 3O₂(g) 2KCl(s) How many grams of potassium chlorate are needed to produce 38.2 L of oxygen gas at a pressure of 2.00 atm at a temperature of 310K?

(Multiple Choice)

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Question 6

In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39C. What pressure does the gas exert if it is assumed to be ideal?

(Multiple Choice)

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Question 7

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is and that 1 N  1 kg m/s².

(Multiple Choice)

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Question 8

Which of the following graphs shows the correct relationship between the pressure and temperature of an ideal gas in a given volume? Note the origin corresponds to P  0 atm and T  0 K.

(Multiple Choice)

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Question 9

Given the following relationships, and , show how to determine the SI units of pressure in basic SI units (kg, m, and s).

(Short Answer)

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Question 10

Three bulbs are connected as shown in the diagram below. For purposes of a biology experiment, an artificial atmosphere is being created for test animals to breathe. What is the partial pressure of oxygen inside the system when all the valves are opened and the gases mix completely? The flasks are at the same temperature, and the temperature does not change when the gases mix. Assume the volume of the tube connecting the bulbs is negligible.

(Short Answer)

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Question 11

Which one of these samples contains the smallest number of particles (atoms or molecules)? Explain your logic. 1.0 L of H₂ at STP (0C and 1 atm) 1.0 L of N₂ at STP 1.0 L of H₂ at 20C and 760 torr 1.0 L of N₂ at 0C and 800 torr 1.0 L of He at STP

(Essay)

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Question 12

Hyperbaric oxygen chambers providing pure oxygen (O₂) at pressures greater than 1 atm are used to treat divers suffering from decompression sickness as well as patients with thermal burns and carbon monoxide poisoning. What is the pressure in a chamber with a volume of 2,500 L containing 5,000 g of oxygen at 298 K?

(Short Answer)

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Question 13

The density of a gaseous compound of nitrogen and oxygen is 4.11 g/L at STP. What is the most likely formula of this gas?

(Multiple Choice)

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Question 14

What is the temperature of a sample of ozone (O₃) with an average kinetic energy of 1.73 kJ/mol?

(Multiple Choice)

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Question 15

What is the temperature if 3.0 g of propane (C₃H₈) in a 400.0 mL container exerts a pressure of 5.5 atm?

(Short Answer)

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Question 16

Which of the following reactions will result in a reduced total pressure?

(Multiple Choice)

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Question 17

A sample of gas at 4.0 atm and 25.0 mL is heated from 25C to 40C. If the pressure remains constant, what is the final volume of the gas?

(Multiple Choice)

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Question 18

Which one of the following statements is not correct? In a sample of air at a given temperature ________

(Multiple Choice)

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Question 19

Nitrous oxide (N₂O, also known as laughing gas) has been used as an anesthetic. What is the density of N₂O at 750 torr and 30°C?

(Short Answer)

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Question 20

Showing 1 - 20 of 164

A 5 L diving tank is filled to a pressure of 45 atm with He, and then is topped off with O₂ to a total pressure of 50 atm. What is the mole fraction of oxygen in the tank?

A gas mixture has partial pressures of 120 torr N₂, 350 torr Ar, and 480 torr SF₆. What is the mole fraction of sulfur hexafluoride in the mixture?

What is the density of propane gas (CH₃CH₂CH₃, 44.1 g/mol) at 25C and 650 mm Hg?

The van der Waals equation for real gases contains an a parameter and a b parameter. Which statement about these parameters is not correct?

When a certain acid and a certain base are mixed together, a reaction occurs that produces a gas as one of the products. The gas has a density of 2.62 g/L at 1.47 atm and 27C. What are the molar mass and identity of the gas?

In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39C. What pressure does the gas exert if it is assumed to be ideal?

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is and that 1 N  1 kg m/s².

Which of the following graphs shows the correct relationship between the pressure and temperature of an ideal gas in a given volume? Note the origin corresponds to P  0 atm and T  0 K.

Given the following relationships, and , show how to determine the SI units of pressure in basic SI units (kg, m, and s).

Which one of these samples contains the smallest number of particles (atoms or molecules)? Explain your logic. 1.0 L of H₂ at STP (0C and 1 atm) 1.0 L of N₂ at STP 1.0 L of H₂ at 20C and 760 torr 1.0 L of N₂ at 0C and 800 torr 1.0 L of He at STP

The density of a gaseous compound of nitrogen and oxygen is 4.11 g/L at STP. What is the most likely formula of this gas?

What is the temperature of a sample of ozone (O₃) with an average kinetic energy of 1.73 kJ/mol?

What is the temperature if 3.0 g of propane (C₃H₈) in a 400.0 mL container exerts a pressure of 5.5 atm?

Which of the following reactions will result in a reduced total pressure?

A sample of gas at 4.0 atm and 25.0 mL is heated from 25C to 40C. If the pressure remains constant, what is the final volume of the gas?

Which one of the following statements is not correct? In a sample of air at a given temperature ________

Nitrous oxide (N₂O, also known as laughing gas) has been used as an anesthetic. What is the density of N₂O at 750 torr and 30°C?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

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Exam 6: Properties of Gases: The Air We Breathe

A 5 L diving tank is filled to a pressure of 45 atm with He, and then is topped off with O2 to a total pressure of 50 atm. What is the mole fraction of oxygen in the tank?

A gas mixture has partial pressures of 120 torr N2, 350 torr Ar, and 480 torr SF6. What is the mole fraction of sulfur hexafluoride in the mixture?

What is the density of propane gas (CH3CH2CH3, 44.1 g/mol) at 25C and 650 mm Hg?

The van der Waals equation for real gases contains an a parameter and a b parameter. Which statement about these parameters is not correct?

When a certain acid and a certain base are mixed together, a reaction occurs that produces a gas as one of the products. The gas has a density of 2.62 g/L at 1.47 atm and 27C. What are the molar mass and identity of the gas?

In an experiment, 7.5 mol of a gas are held in a 3.5 L container at 39C. What pressure does the gas exert if it is assumed to be ideal?

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is and that 1 N  1 kg m/s2.

Which of the following graphs shows the correct relationship between the pressure and temperature of an ideal gas in a given volume? Note the origin corresponds to P  0 atm and T  0 K.

Given the following relationships, and , show how to determine the SI units of pressure in basic SI units (kg, m, and s).

Which one of these samples contains the smallest number of particles (atoms or molecules)? Explain your logic. 1.0 L of H2 at STP (0C and 1 atm) 1.0 L of N2 at STP 1.0 L of H2 at 20C and 760 torr 1.0 L of N2 at 0C and 800 torr 1.0 L of He at STP

The density of a gaseous compound of nitrogen and oxygen is 4.11 g/L at STP. What is the most likely formula of this gas?

What is the temperature of a sample of ozone (O3) with an average kinetic energy of 1.73 kJ/mol?

What is the temperature if 3.0 g of propane (C3H8) in a 400.0 mL container exerts a pressure of 5.5 atm?

Which of the following reactions will result in a reduced total pressure?

A sample of gas at 4.0 atm and 25.0 mL is heated from 25C to 40C. If the pressure remains constant, what is the final volume of the gas?

Which one of the following statements is not correct? In a sample of air at a given temperature ________

Nitrous oxide (N2O, also known as laughing gas) has been used as an anesthetic. What is the density of N2O at 750 torr and 30°C?

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Molecular Geometry: Shape Determines Function

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

A 5 L diving tank is filled to a pressure of 45 atm with He, and then is topped off with O₂ to a total pressure of 50 atm. What is the mole fraction of oxygen in the tank?

A gas mixture has partial pressures of 120 torr N₂, 350 torr Ar, and 480 torr SF₆. What is the mole fraction of sulfur hexafluoride in the mixture?

What is the density of propane gas (CH₃CH₂CH₃, 44.1 g/mol) at 25C and 650 mm Hg?

What pressure will be measured (in Pa) if a gas is exerting a force of 10.00 N on a mercury barometer with an inner diameter of 10.00 mm? Recall that the area of a circle is and that 1 N  1 kg m/s².

Which one of these samples contains the smallest number of particles (atoms or molecules)? Explain your logic. 1.0 L of H₂ at STP (0C and 1 atm) 1.0 L of N₂ at STP 1.0 L of H₂ at 20C and 760 torr 1.0 L of N₂ at 0C and 800 torr 1.0 L of He at STP

What is the temperature of a sample of ozone (O₃) with an average kinetic energy of 1.73 kJ/mol?

What is the temperature if 3.0 g of propane (C₃H₈) in a 400.0 mL container exerts a pressure of 5.5 atm?

Nitrous oxide (N₂O, also known as laughing gas) has been used as an anesthetic. What is the density of N₂O at 750 torr and 30°C?