Calculate the root-mean-square speed of methane,CH4 (g),at 78°C.

A) 23 m/s B) 350 m/s C) 550 m/s D) 667 m/s E) 740 m/s A) 23 m/s B) 350 m/s C) 550 m/s D) 667 m/s E) 740 m/s

A 250.0-mL sample of ammonia,NH3(g),exerts a pressure of 833 torr at 42.4°C.What mass of ammonia is in the container?

A) 0.0787 g B) 0.180 g C) 8.04 g D) 17.0 g E) 59.8 g A) 0.0787 g B) 0.180 g C) 8.04 g D) 17.0 g E) 59.8 g

Exam 5: Gases and the Kinetic-Molecular Theory

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

(Multiple Choice)

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Question 41

Select the gas with the highest average kinetic energy per mole at 298 K.

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Question 42

The temperature of the carbon dioxide atmosphere near the surface of Venus is 475°C.Calculate the average kinetic energy per mole of carbon dioxide molecules on Venus.

(Multiple Choice)

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Question 43

Calculate the root-mean-square speed of methane,CH₄ (g),at 78°C.

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Question 44

Aluminum metal shavings (10.0 g)are placed in 100.mL of 6.00 M hydrochloric acid.What is the maximum volume of hydrogen,measured at STP,which can be produced? 2Al(s)+ 6HCl(aq) $\to$ 2AlCl₃(aq)+ 3H₂(g)

(Short Answer)

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Question 45

Nitrogen will behave most like an ideal gas

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Question 46

Calculate the density in g/L of gaseous SF₆ at 50.0°C and 650.torr.

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Question 47

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) $\to$ 2C₂H₅OH(aq)+ 2CO₂(g)

(Short Answer)

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Question 48

A sample container of carbon monoxide occupies a volume of 435 mL at a pressure of 785 torr and a temperature of 298 K.What would its temperature be if the volume were changed to 265 mL at a pressure of 785 torr?

(Multiple Choice)

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Question 49

A sample of the inert gas krypton has its pressure tripled while its temperature remained constant.If the original volume is 12 L,what is the final volume?

(Multiple Choice)

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Question 50

For a gas obeying Charles' Law,a plot of V versus 1/T will give a straight line passing through the origin.

(True/False)

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Question 51

A 250.0-mL sample of ammonia,NH₃(g),exerts a pressure of 833 torr at 42.4°C.What mass of ammonia is in the container?

(Multiple Choice)

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Question 52

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

(Multiple Choice)

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Question 53

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles.What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li₂O(aq)+ CO₂(g) $\to$ Li₂CO₃(s)

(Multiple Choice)

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Question 54

What are the conditions of STP?

(Multiple Choice)

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Question 55

Select the gas with the largest root-mean-square molecular speed at 25°C.

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Question 56

For real gases,PV < nRT,always.

(True/False)

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Question 57

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 58

Freon-12,CF₂Cl₂,which has been widely used in air conditioning systems,is considered a threat to the ozone layer in the stratosphere.Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is -65°C.

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Question 59

A 255-mL gas sample weighing 0.292 g is at 52,810 Pa and 127°C. a.How many moles of gas are present? b.What is the molar mass of the gas?

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Question 60

Showing 41 - 60 of 93

Exam 5: Gases and the Kinetic-Molecular Theory

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

Select the gas with the highest average kinetic energy per mole at 298 K.

The temperature of the carbon dioxide atmosphere near the surface of Venus is 475°C.Calculate the average kinetic energy per mole of carbon dioxide molecules on Venus.

Calculate the root-mean-square speed of methane,CH4 (g),at 78°C.

Aluminum metal shavings (10.0 g)are placed in 100.mL of 6.00 M hydrochloric acid.What is the maximum volume of hydrogen,measured at STP,which can be produced? 2Al(s)+ 6HCl(aq) →\to→ 2AlCl3(aq)+ 3H2(g)

Nitrogen will behave most like an ideal gas

Calculate the density in g/L of gaseous SF6 at 50.0°C and 650.torr.

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) →\to→ 2C2H5OH(aq)+ 2CO2(g)

A sample container of carbon monoxide occupies a volume of 435 mL at a pressure of 785 torr and a temperature of 298 K.What would its temperature be if the volume were changed to 265 mL at a pressure of 785 torr?

A sample of the inert gas krypton has its pressure tripled while its temperature remained constant.If the original volume is 12 L,what is the final volume?

For a gas obeying Charles' Law,a plot of V versus 1/T will give a straight line passing through the origin.

A 250.0-mL sample of ammonia,NH3(g),exerts a pressure of 833 torr at 42.4°C.What mass of ammonia is in the container?

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

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles.What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li2O(aq)+ CO2(g) →\to→ Li2CO3(s)

What are the conditions of STP?

Select the gas with the largest root-mean-square molecular speed at 25°C.

For real gases,PV < nRT,always.

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?

Freon-12,CF2Cl2,which has been widely used in air conditioning systems,is considered a threat to the ozone layer in the stratosphere.Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is -65°C.

A 255-mL gas sample weighing 0.292 g is at 52,810 Pa and 127°C. a.How many moles of gas are present? b.What is the molar mass of the gas?

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three 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 Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

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 Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

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Calculate the root-mean-square speed of methane,CH₄ (g),at 78°C.

Aluminum metal shavings (10.0 g)are placed in 100.mL of 6.00 M hydrochloric acid.What is the maximum volume of hydrogen,measured at STP,which can be produced? 2Al(s)+ 6HCl(aq) $\to$ 2AlCl₃(aq)+ 3H₂(g)

Calculate the density in g/L of gaseous SF₆ at 50.0°C and 650.torr.

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) $\to$ 2C₂H₅OH(aq)+ 2CO₂(g)

A 250.0-mL sample of ammonia,NH₃(g),exerts a pressure of 833 torr at 42.4°C.What mass of ammonia is in the container?

Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles.What volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25°C and 1.00 atm? Li₂O(aq)+ CO₂(g) $\to$ Li₂CO₃(s)

Freon-12,CF₂Cl₂,which has been widely used in air conditioning systems,is considered a threat to the ozone layer in the stratosphere.Calculate the root-mean-square velocity of Freon-12 molecules in the lower stratosphere where the temperature is -65°C.