Question 1

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?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e

Question 2

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

Accepted Answer

A) O2 
B) CO2 
C) H2O 
D) H2 
E) All have the same average kinetic energy.

Question 3

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.

Accepted Answer

A) 2520 J/mol 
B) 4150 J/mol 
C) 5920 J/mol 
D) 9330 J/mol 
E) 5920 kJ/mol

Question 4

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

Accepted Answer

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

Question 5

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)

Accepted Answer

The answer of Aluminum metal shavings (10.0 g)are placed in...

Question 6

Nitrogen will behave most like an ideal gas

Accepted Answer

A) at high temperature and high pressure. 
B) at high temperature and low pressure. 
C) at low temperature and high pressure. 
D) at low temperature and low pressure. 
E) at intermediate (moderate)temperature and pressure.

Question 7

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

Accepted Answer

The answer of Calculate the density in g/L of gaseous...

Question 8

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)

Accepted Answer

The answer of In the fermentation process,yeast converts glucose to...

Question 9

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?

Accepted Answer

A) 182 K 
B) 298 K 
C) 387 K 
D) 489 K 
E) 538 K

Question 10

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?

Accepted Answer

A) 4.0 L 
B) 6.0 L 
C) 9 L 
D) 36 L 
E) 48 L

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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?

Accepted Answer

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

Question 13

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

Accepted Answer

A) 520 torr 
B) 562 torr 
C) 3900 torr 
D) 7600 torr 
E) 75,000 torr

Question 14

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)

Accepted Answer

A) 687 mL 
B) 819 mL 
C) 687 L 
D) 819 L 
E) 22.4 L

Question 15

What are the conditions of STP?

Accepted Answer

A) 0 K and l atm 
B) 273.15 K and 760 torr 
C) 0°C and 760 atm 
D) 273.15°C and 760 torr 
E) None of these choices is correct.

Question 16

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

Accepted Answer

A) NH3 
B) CO 
C) H2 
D) SF6 
E) All the gases have the same root-mean-square molecular speed at 25°C.

Question 17

For real gases,PV < nRT,always.

Accepted Answer

A) True 
 B)False

Question 18

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?

Accepted Answer

A) 1.49 M 
B) 1.66 M 
C) 7.82 M 
D) 12.5 M 
E) 16.6 M

Question 19

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.

Accepted Answer

A) 20 m/s 
B) 120 m/s 
C) 210 m/s 
D) 260 m/s 
E) 4.4 $\times$ 104 m/s

Question 20

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?

Accepted Answer

The answer of A 255-mL gas sample weighing 0.292 g...

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?

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?

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.