Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains CH4,flask B contains CO2,flask C contains N2.Which flask contains the largest number of molecules?

A) flask A B) flask B C) flask C D) All flasks contain the same number of molecules. A) flask A B) flask B C) flask C D) All flasks contain the same number of molecules.

A balloon contains 0.76 mol N2,0.18 mol O2,0.031 mol He and 0.026 mol H2 at 749 mm Hg.What is the partial pressure of O2?

A) 20 mm Hg B) 23 mm Hg C) 140 mm Hg D) 570 mm Hg A) 20 mm Hg B) 23 mm Hg C) 140 mm Hg D) 570 mm Hg

How many molecules of N2 are in a 500.0 mL container at 780 mm Hg and 135°C?

A) 8)76 × 1021 B) 9)23 × 1021 C) 2)65 × 1022 D) 2)79 × 1022 A) 8)76 × 1021 B) 9)23 × 1021 C) 2)65 × 1022 D) 2)79 × 1022

A 0.500 g sample containing Ag2O and inert material is heated,causing the silver oxide to decompose according to the following equation: 2 Ag2O(s)→ 4 Ag(s)+ O2(g) If 13.8 mL of gas are collected over water at 27°C and 1.00 atm external pressure,what is the percentage of silver oxide in the sample? The partial pressure of water is 26.7 mm Hg at 27°C.

A) 12.5% B) 25.1% C) 50.1% D) 51.9% A) 12.5% B) 25.1% C) 50.1% D) 51.9%

Exam 9: Gases: Their Properties and Behavior

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains CH₄,flask B contains CO₂,flask C contains N₂.Which flask contains the largest number of molecules?

(Multiple Choice)

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Question 81

What is the density of hydrogen gas at STP?

(Multiple Choice)

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Question 82

A balloon contains 0.76 mol N₂,0.18 mol O₂,0.031 mol He and 0.026 mol H₂ at 749 mm Hg.What is the partial pressure of O₂?

(Multiple Choice)

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Question 83

Assume that you have a sample of gas in a cylinder with a moveable piston,as shown in diagram (1).The initial pressure,number of moles,and temperature of the gas are noted on the diagram. -Which diagram (2)-(4)most closely represents the result of doubling the pressure and doubling the temperature while keeping the number of moles of gas constant?

(Multiple Choice)

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Question 84

How many molecules of N₂ are in a 500.0 mL container at 780 mm Hg and 135°C?

(Multiple Choice)

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Question 85

A 0.500 g sample containing Ag₂O and inert material is heated,causing the silver oxide to decompose according to the following equation: 2 Ag₂O(s)→ 4 Ag(s)+ O₂(g) If 13.8 mL of gas are collected over water at 27°C and 1.00 atm external pressure,what is the percentage of silver oxide in the sample? The partial pressure of water is 26.7 mm Hg at 27°C.

(Multiple Choice)

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Question 86

Which one of the following is not used to describe the condition of a gas?

(Multiple Choice)

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Question 87

A 0.286-g sample of gas occupies 125 mL at 60.cm of Hg and 25°C.What is the molar mass of the gas?

(Multiple Choice)

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Question 88

Which of the following gases has the lowest average speed at 25°C?

(Multiple Choice)

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Question 89

Assume that you have a sample of gas in a cylinder with a moveable piston,as shown in diagram (1).The initial pressure,number of moles,and temperature of the gas are noted on the diagram. -Which diagram (2)-(4)most closely represents the result of doubling the pressure while keeping the temperature and number of moles of gas constant?

(Multiple Choice)

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Question 90

Which of the following is the principal cause of global warming?

(Multiple Choice)

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Question 91

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 740 mm Hg and the difference in mercury levels,Δh,is 30 mm Hg?

(Multiple Choice)

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Question 92

At STP if 1.00 mole of gas occupies 22.4 L then 0.200 mole of gas would occupy ________ L under the same conditions.

(Short Answer)

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Question 93

A gas occupies 22.4 L at STP and 19.0 L at 100°C and 1.50 atm pressure.How many moles of gas did the system gain or lose?

(Multiple Choice)

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Question 94

What is the density of fluorine gas at STP?

(Multiple Choice)

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Question 95

The SI unit for pressure is the

(Multiple Choice)

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Question 96

One reaction that contributes to photochemical smog is shown below.Which of the species involved contains one or more unpaired electrons? NO₂(g)+ hυ →NO(g)+ O(g)

(Multiple Choice)

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Question 97

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -20°C,cylinder B is at -15°F,cylinder C is at 260 K.Which cylinder contains the largest mass of oxygen?

(Multiple Choice)

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Question 98

An unusual correlation exists between the potency of an inhaled anesthetic and its ability to

(Multiple Choice)

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Question 99

The lowest atmospheric temperatures are found at the

(Multiple Choice)

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Question 100

Showing 81 - 100 of 182

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains CH₄,flask B contains CO₂,flask C contains N₂.Which flask contains the largest number of molecules?

What is the density of hydrogen gas at STP?

A balloon contains 0.76 mol N₂,0.18 mol O₂,0.031 mol He and 0.026 mol H₂ at 749 mm Hg.What is the partial pressure of O₂?

How many molecules of N₂ are in a 500.0 mL container at 780 mm Hg and 135°C?

Which one of the following is not used to describe the condition of a gas?

A 0.286-g sample of gas occupies 125 mL at 60.cm of Hg and 25°C.What is the molar mass of the gas?

Which of the following gases has the lowest average speed at 25°C?

Which of the following is the principal cause of global warming?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 740 mm Hg and the difference in mercury levels,Δh,is 30 mm Hg?

At STP if 1.00 mole of gas occupies 22.4 L then 0.200 mole of gas would occupy ________ L under the same conditions.

A gas occupies 22.4 L at STP and 19.0 L at 100°C and 1.50 atm pressure.How many moles of gas did the system gain or lose?

What is the density of fluorine gas at STP?

The SI unit for pressure is the

One reaction that contributes to photochemical smog is shown below.Which of the species involved contains one or more unpaired electrons? NO₂(g)+ hυ →NO(g)+ O(g)

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -20°C,cylinder B is at -15°F,cylinder C is at 260 K.Which cylinder contains the largest mass of oxygen?

An unusual correlation exists between the potency of an inhaled anesthetic and its ability to

The lowest atmospheric temperatures are found at the

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Exam 9: Gases: Their Properties and Behavior

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains CH4,flask B contains CO2,flask C contains N2.Which flask contains the largest number of molecules?

What is the density of hydrogen gas at STP?

A balloon contains 0.76 mol N2,0.18 mol O2,0.031 mol He and 0.026 mol H2 at 749 mm Hg.What is the partial pressure of O2?

How many molecules of N2 are in a 500.0 mL container at 780 mm Hg and 135°C?

Which one of the following is not used to describe the condition of a gas?

A 0.286-g sample of gas occupies 125 mL at 60.cm of Hg and 25°C.What is the molar mass of the gas?

Which of the following gases has the lowest average speed at 25°C?

Which of the following is the principal cause of global warming?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,Patm,is 740 mm Hg and the difference in mercury levels,Δh,is 30 mm Hg?

At STP if 1.00 mole of gas occupies 22.4 L then 0.200 mole of gas would occupy ________ L under the same conditions.

A gas occupies 22.4 L at STP and 19.0 L at 100°C and 1.50 atm pressure.How many moles of gas did the system gain or lose?

What is the density of fluorine gas at STP?

The SI unit for pressure is the

One reaction that contributes to photochemical smog is shown below.Which of the species involved contains one or more unpaired electrons? NO2(g)+ hυ →NO(g)+ O(g)

Given three cylinders containing O2 gas at the same volume and pressure.Cylinder A is at -20°C,cylinder B is at -15°F,cylinder C is at 260 K.Which cylinder contains the largest mass of oxygen?

An unusual correlation exists between the potency of an inhaled anesthetic and its ability to

The lowest atmospheric temperatures are found at the

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Liquids,solids,and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains CH₄,flask B contains CO₂,flask C contains N₂.Which flask contains the largest number of molecules?

A balloon contains 0.76 mol N₂,0.18 mol O₂,0.031 mol He and 0.026 mol H₂ at 749 mm Hg.What is the partial pressure of O₂?

How many molecules of N₂ are in a 500.0 mL container at 780 mm Hg and 135°C?

-What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 740 mm Hg and the difference in mercury levels,Δh,is 30 mm Hg?

One reaction that contributes to photochemical smog is shown below.Which of the species involved contains one or more unpaired electrons? NO₂(g)+ hυ →NO(g)+ O(g)

Given three cylinders containing O₂ gas at the same volume and pressure.Cylinder A is at -20°C,cylinder B is at -15°F,cylinder C is at 260 K.Which cylinder contains the largest mass of oxygen?