Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C2H4,flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

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

How many molecules of N2 are in a 400.0 mL container at 780 mm Hg and 135°C?

A) 7)01 × 1021 molecules B) 7)38 × 1021 molecules C) 2)12 × 1022 molecules D) 2)23 × 1022 molecules A) 7)01 × 1021 molecules B) 7)38 × 1021 molecules C) 2)12 × 1022 molecules D) 2)23 × 1022 molecules

Exam 9: Gases: Their Properties and Behavior

Effusion of a 1:1 mixture of two gases,represented by unshaded and shaded spheres in the diagram below,through a small pinhole produces the result shown below.The shaded spheres have a molecular mass of 32 amu.Which gas molecules have the higher average speed and what is the molecular mass of the unshaded molecules?

(Multiple Choice)

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Question 61

Under the same pressure and temperature conditions,the level of water inside a barometer will be than the level of mercury inside the barometer by a factor equal to the ratio of the density of over the density of .

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Question 62

Which of the following regions of the earth's atmosphere is closest to the surface of the earth?

(Multiple Choice)

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Question 63

In a flask containing 2.00 mol of He,3.00 mol of Ne,and 5.00 mol of Ar at STP the partial pressure of He is ________ mm Hg.

(Short Answer)

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Question 64

Which of the following gases has the highest average speed at 400K?

(Multiple Choice)

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Question 65

If 1.0 gram each of Cl₂,CO₂,N₂,and O₂ are contained in a 5-L flask,the gas with the highest partial pressure is ________.

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Question 66

Which of the following instruments directly measures the pressure of a gas?

(Multiple Choice)

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Question 67

Which of the following would have a density of 1.21 g/L at 7.0°C and 0.987 atm?

(Multiple Choice)

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Question 68

One mole of gas at 25°C has a ________ volume than one mole of gas at standard temperature.

(Short Answer)

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Question 69

The pressure in the eye of a hurricane is less than atmospheric pressure.Which one of the following pressure readings could not have been taken in the eye of a hurricane?

(Multiple Choice)

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Question 70

A 10.0-L flask containing He,2.00 mole of Ar,and 3.00 mole of Ne has a total pressure of 24.5 atm at 25°C.How many moles of He are in the flask?

(Multiple Choice)

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Question 71

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C₂H₄,flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules?

(Multiple Choice)

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Question 72

What is the temperature of NO₂ gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

(Multiple Choice)

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Question 73

How many molecules of N₂ are in a 400.0 mL container at 780 mm Hg and 135°C?

(Multiple Choice)

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Question 74

To two significant figures,by what factor will the pressure of an ideal gas change if the temperature of the gas is changed from 100°C to 200°C?

(Short Answer)

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Question 75

The apparatus shown is called a closed-end manometer because the arm not connected to the gas sample is closed to the atmosphere and is under vacuum. -What is the pressure (in mm Hg)of the gas inside the above apparatus if the outside pressure,P_atm,is 750 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

(Multiple Choice)

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Question 76

A glass tube has one end in a dish of mercury and the other end closed by a stopcock.The distance from the surface of the mercury to the bottom of the stopcock is 800 mm,as indicated by the meter stick shown in the drawing below.The apparatus is at 20°C,and the mercury level in the tube is the same as that in the dish. -Which drawing best shows the approximate level of the mercury in the tube when a vacuum pump is connected to the top of the tube,the stopcock opened,the tube is evacuated,the stopcock is closed,and the pump is removed?

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Question 77

A 1.000 kg sample of nitroglycerine,C₃H₅N₃O₉,explodes and releases gases with a temperature of 1985°C at 1.000 atm.What is the volume of gas produced? 4 C₃H₅N₃O₉(l)→ 12 CO₂(g)+ 10 H₂O(g)+ 6 N₂(g)+ O₂(g)

(Multiple Choice)

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Question 78

When temperature-volume measurements are made on 1.0 mol of gas at 1.0 atm,a plot V versus T results in a

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Question 79

The region of the atmosphere that is closest to the earth's surface is the ________.

(Short Answer)

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Question 80

Showing 61 - 80 of 182

Under the same pressure and temperature conditions,the level of water inside a barometer will be than the level of mercury inside the barometer by a factor equal to the ratio of the density of over the density of .

Which of the following regions of the earth's atmosphere is closest to the surface of the earth?

In a flask containing 2.00 mol of He,3.00 mol of Ne,and 5.00 mol of Ar at STP the partial pressure of He is ________ mm Hg.

Which of the following gases has the highest average speed at 400K?

If 1.0 gram each of Cl₂,CO₂,N₂,and O₂ are contained in a 5-L flask,the gas with the highest partial pressure is ________.

Which of the following instruments directly measures the pressure of a gas?

Which of the following would have a density of 1.21 g/L at 7.0°C and 0.987 atm?

One mole of gas at 25°C has a ________ volume than one mole of gas at standard temperature.

The pressure in the eye of a hurricane is less than atmospheric pressure.Which one of the following pressure readings could not have been taken in the eye of a hurricane?

A 10.0-L flask containing He,2.00 mole of Ar,and 3.00 mole of Ne has a total pressure of 24.5 atm at 25°C.How many moles of He are in the flask?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C₂H₄,flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules?

What is the temperature of NO₂ gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

How many molecules of N₂ are in a 400.0 mL container at 780 mm Hg and 135°C?

To two significant figures,by what factor will the pressure of an ideal gas change if the temperature of the gas is changed from 100°C to 200°C?

A 1.000 kg sample of nitroglycerine,C₃H₅N₃O₉,explodes and releases gases with a temperature of 1985°C at 1.000 atm.What is the volume of gas produced? 4 C₃H₅N₃O₉(l)→ 12 CO₂(g)+ 10 H₂O(g)+ 6 N₂(g)+ O₂(g)

When temperature-volume measurements are made on 1.0 mol of gas at 1.0 atm,a plot V versus T results in a

The region of the atmosphere that is closest to the earth's surface is 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

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Exam 9: Gases: Their Properties and Behavior

Under the same pressure and temperature conditions,the level of water inside a barometer will be ________ than the level of mercury inside the barometer by a factor equal to the ratio of the density of ________ over the density of ________.

Which of the following regions of the earth's atmosphere is closest to the surface of the earth?

In a flask containing 2.00 mol of He,3.00 mol of Ne,and 5.00 mol of Ar at STP the partial pressure of He is ________ mm Hg.

Which of the following gases has the highest average speed at 400K?

If 1.0 gram each of Cl2,CO2,N2,and O2 are contained in a 5-L flask,the gas with the highest partial pressure is ________.

Which of the following instruments directly measures the pressure of a gas?

Which of the following would have a density of 1.21 g/L at 7.0°C and 0.987 atm?

One mole of gas at 25°C has a ________ volume than one mole of gas at standard temperature.

The pressure in the eye of a hurricane is less than atmospheric pressure.Which one of the following pressure readings could not have been taken in the eye of a hurricane?

A 10.0-L flask containing He,2.00 mole of Ar,and 3.00 mole of Ne has a total pressure of 24.5 atm at 25°C.How many moles of He are in the flask?

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C2H4,flask B contains O3,and flask C contains F2.Which flask contains the largest number of molecules?

What is the temperature of NO2 gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

How many molecules of N2 are in a 400.0 mL container at 780 mm Hg and 135°C?

To two significant figures,by what factor will the pressure of an ideal gas change if the temperature of the gas is changed from 100°C to 200°C?

A 1.000 kg sample of nitroglycerine,C3H5N3O9,explodes and releases gases with a temperature of 1985°C at 1.000 atm.What is the volume of gas produced? 4 C3H5N3O9(l)→ 12 CO2(g)+ 10 H2O(g)+ 6 N2(g)+ O2(g)

When temperature-volume measurements are made on 1.0 mol of gas at 1.0 atm,a plot V versus T results in a

The region of the atmosphere that is closest to the earth's surface is 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

Under the same pressure and temperature conditions,the level of water inside a barometer will be than the level of mercury inside the barometer by a factor equal to the ratio of the density of over the density of .

If 1.0 gram each of Cl₂,CO₂,N₂,and O₂ are contained in a 5-L flask,the gas with the highest partial pressure is ________.

Three identical flasks contain three different gases at standard temperature and pressure.Flask A contains C₂H₄,flask B contains O₃,and flask C contains F₂.Which flask contains the largest number of molecules?

What is the temperature of NO₂ gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

How many molecules of N₂ are in a 400.0 mL container at 780 mm Hg and 135°C?

A 1.000 kg sample of nitroglycerine,C₃H₅N₃O₉,explodes and releases gases with a temperature of 1985°C at 1.000 atm.What is the volume of gas produced? 4 C₃H₅N₃O₉(l)→ 12 CO₂(g)+ 10 H₂O(g)+ 6 N₂(g)+ O₂(g)