Question 1

The principal cause of man-made ozone depletion in the stratosphere is due to

Accepted Answer

A) NO2. 
B) CH4. 
C) CO2. 
D) Cl. 
A) NO2. 
B) CH4. 
C) CO2. 
D) Cl. D

Question 2

Some assumptions from the kinetic molecular theory are listed below.Which one is most frequently cited to explain compressibility of a gas?

Accepted Answer

A) The average kinetic energy of gas particles is proportional to the Kelvin temperature. 
B) Collisions of gas particles are elastic and total kinetic energy of the gas is constant. 
C) A gas consist of tiny particles moving in random straight line motion. 
D) The volume of the particles is negligible compared to the volume of the gas. 
A) The average kinetic energy of gas particles is proportional to the Kelvin temperature. 
B) Collisions of gas particles are elastic and total kinetic energy of the gas is constant. 
C) A gas consist of tiny particles moving in random straight line motion. 
D) The volume of the particles is negligible compared to the volume of the gas. D

Question 3

A 75.0 L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

Accepted Answer

A) 4)33 g 
B) 6)01 g 
C) 113 g 
D) 1650 g 
A) 4)33 g 
B) 6)01 g 
C) 113 g 
D) 1650 g C

Question 4

If CO2 and NH3 are allowed to effuse through a porous membrane under identical conditions,the rate of effusion for NH3 will be ________ times that of CO2.

Accepted Answer

A) 0)39 
B) 0)62 
C) 1)6 
D) 2)6 
A) 0)39 
B) 0)62 
C) 1)6 
D) 2)6

Question 5

What is the value of the gas constant,R,in units of  
?

Accepted Answer

A) 1)080 × 10-4 
B) 0)1080 
C) 62.36 
D) 6)236 × 104 
A) 1)080 × 10-4 
B) 0)1080 
C) 62.36 
D) 6)236 × 104

Question 6

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 number of moles of gas while keeping the temperature constant?

Accepted Answer

A) diagram (2) 
B) diagram (3) 
C) diagram (4) 
A) diagram (2) 
B) diagram (3) 
C) diagram (4)

Question 7

In the laboratory,hydrogen gas is usually made by the following reaction:
Zn(s)+ 2 HCl(aq)→ H2(g)+ ZnCl2(aq)
How many liters of H2 gas,collected over water at an atmospheric pressure of 752 mm Hg and a temperature of 21.0°C,can be made from 3.566 g of Zn and excess HCl? The partial pressure of water vapor is 18.65 mm Hg at 21.0°C.

Accepted Answer

A) 0)0975 L 
B) 1)30 L 
C) 1)33 L 
D) 1)36 L 
A) 0)0975 L 
B) 1)30 L 
C) 1)33 L 
D) 1)36 L

Question 8

If the pressure in a gas container that is connected to an open-end U-tube manometer is 106 kPa and the pressure of the atmosphere at the open end of the tube is 742 mm Hg,the level of mercury in the tube will be

Accepted Answer

A) 53 mm higher in the arm open to the atmosphere. 
B) 53 mm higher in the arm connected to the gas cylinder. 
C) 636 mm higher in the arm open to the atmosphere. 
D) 636 mm higher in the arm connected to the gas cylinder. 
A) 53 mm higher in the arm open to the atmosphere. 
B) 53 mm higher in the arm connected to the gas cylinder. 
C) 636 mm higher in the arm open to the atmosphere. 
D) 636 mm higher in the arm connected to the gas cylinder.

Question 9

In the diagram below,helium atoms are represented by unshaded spheres,neon atoms by gray spheres,and argon atoms by black spheres.  
-If the total pressure in the container is 900 mm Hg,what is the partial pressure of argon?

Accepted Answer

A) 90 mm Hg 
B) 180 mm Hg 
C) 270 mm Hg 
D) 450 mm Hg 
A) 90 mm Hg 
B) 180 mm Hg 
C) 270 mm Hg 
D) 450 mm Hg

Question 10

If 1.0 mol of N2 and 3.0 mol of H2 in a closed container initially at STP react completely in the reaction shown below,then the final pressure in the flask will be ________ atm at 273 K.
N2(g)+ 3 H2(g)→ 2 NH3(g)

Accepted Answer

Question 11

Suppose you needed to closely monitor small changes in pressure inside a container using an open end manometer.For the best accuracy,the substance in the manometer should

Accepted Answer

A) be a solid. 
B) be mercury. 
C) have a high density. 
D) have a low density. 
A) be a solid. 
B) be mercury. 
C) have a high density. 
D) have a low density.

Question 12

Assume that you have a mixture of nitrogen (molecular mass = 28 amu),represented by unshaded spheres,and chlorine (molecular mass = 71 amu),represented by shaded spheres at 300 K.Which of the drawings best represents the mixture?

Accepted Answer

A) drawing (a) 
B) drawing (b) 
C) drawing (c) 
A) drawing (a) 
B) drawing (b) 
C) drawing (c)

Question 13

A gas bottle contains 0.250 mol of gas at 730 mm Hg pressure.If the final pressure is 1.15 atm,how many moles of gas were added to the bottle?

Accepted Answer

A) 0)0 262 mol 
B) 0)0493 mol 
C) 0)276 mol 
D) 0)299 mol 
A) 0)0 262 mol 
B) 0)0493 mol 
C) 0)276 mol 
D) 0)299 mol

Question 14

A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage.What is the pressure of the basketball outside where the temperature is -5.00°C?

Accepted Answer

A) 1)37 atm 
B) 1)42 atm 
C) 1)58 atm 
D) 1)64 atm 
A) 1)37 atm 
B) 1)42 atm 
C) 1)58 atm 
D) 1)64 atm

Question 15

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains Ar,cylinder B contains Cl2,and cylinder C contains N2.According to the kinetic molecular theory,which gas has the highest density?

Accepted Answer

A) Ar 
B) Cl2 
C) N2 
D) All have identical densities 
A) Ar 
B) Cl2 
C) N2 
D) All have identical densities

Question 16

When 15.0 g of zinc metal reacts with excess HCl,how many liters of H2 gas are produced at STP?

Accepted Answer

A) 0)229 L 
B) 0)458 L 
C) 5)14 L 
D) 10.3 L 
A) 0)229 L 
B) 0)458 L 
C) 5)14 L 
D) 10.3 L

Question 17

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,Patm,is 745 mm Hg and the difference in mercury levels,Δh,is 25 mm Hg?

Accepted Answer

A) 25 mm Hg 
B) 720 mm Hg 
C) 745 mm Hg 
D) 770 mm Hg 
A) 25 mm Hg 
B) 720 mm Hg 
C) 745 mm Hg 
D) 770 mm Hg

Question 18

One mole of which gas has the greatest density at STP?

Accepted Answer

A) Ar 
B) N2 
C) CO 
D) All three gases have the same density. 
A) Ar 
B) N2 
C) CO 
D) All three gases have the same density.

Question 19

The molecule believed to be most responsible for global warming is ________.

Accepted Answer

The answer of The molecule believed to be most responsible...

Question 20

What is the temperature of CO2 gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

Accepted Answer

A) 1)32 K 
B) 9)92 × 102 K 
C) 1)31 × 103 K 
D) 9)92 × 105 K 
A) 1)32 K 
B) 9)92 × 102 K 
C) 1)31 × 103 K 
D) 9)92 × 105 K

The principal cause of man-made ozone depletion in the stratosphere is due to

Some assumptions from the kinetic molecular theory are listed below.Which one is most frequently cited to explain compressibility of a gas?

A 75.0 L steel tank at 20.0°C contains acetylene gas,C₂H₂,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

If CO₂ and NH₃ are allowed to effuse through a porous membrane under identical conditions,the rate of effusion for NH₃ will be ________ times that of CO₂.

What is the value of the gas constant,R,in units of ?

If the pressure in a gas container that is connected to an open-end U-tube manometer is 106 kPa and the pressure of the atmosphere at the open end of the tube is 742 mm Hg,the level of mercury in the tube will be

In the diagram below,helium atoms are represented by unshaded spheres,neon atoms by gray spheres,and argon atoms by black spheres. -If the total pressure in the container is 900 mm Hg,what is the partial pressure of argon?

If 1.0 mol of N₂ and 3.0 mol of H₂in a closed container initially at STP react completely in the reaction shown below,then the final pressure in the flask will be ________ atm at 273 K. N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

Suppose you needed to closely monitor small changes in pressure inside a container using an open end manometer.For the best accuracy,the substance in the manometer should

Assume that you have a mixture of nitrogen (molecular mass = 28 amu),represented by unshaded spheres,and chlorine (molecular mass = 71 amu),represented by shaded spheres at 300 K.Which of the drawings best represents the mixture?

A gas bottle contains 0.250 mol of gas at 730 mm Hg pressure.If the final pressure is 1.15 atm,how many moles of gas were added to the bottle?

A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage.What is the pressure of the basketball outside where the temperature is -5.00°C?

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains Ar,cylinder B contains Cl₂,and cylinder C contains N₂.According to the kinetic molecular theory,which gas has the highest density?

When 15.0 g of zinc metal reacts with excess HCl,how many liters of H₂ gas are produced at STP?

One mole of which gas has the greatest density at STP?

The molecule believed to be most responsible for global warming is ________.

What is the temperature of CO₂ gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

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

The principal cause of man-made ozone depletion in the stratosphere is due to

Some assumptions from the kinetic molecular theory are listed below.Which one is most frequently cited to explain compressibility of a gas?

A 75.0 L steel tank at 20.0°C contains acetylene gas,C2H2,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

If CO2 and NH3 are allowed to effuse through a porous membrane under identical conditions,the rate of effusion for NH3 will be ________ times that of CO2.

What is the value of the gas constant,R,in units of ?

If the pressure in a gas container that is connected to an open-end U-tube manometer is 106 kPa and the pressure of the atmosphere at the open end of the tube is 742 mm Hg,the level of mercury in the tube will be

In the diagram below,helium atoms are represented by unshaded spheres,neon atoms by gray spheres,and argon atoms by black spheres. -If the total pressure in the container is 900 mm Hg,what is the partial pressure of argon?

If 1.0 mol of N2 and 3.0 mol of H2 in a closed container initially at STP react completely in the reaction shown below,then the final pressure in the flask will be ________ atm at 273 K. N2(g)+ 3 H2(g)→ 2 NH3(g)

Suppose you needed to closely monitor small changes in pressure inside a container using an open end manometer.For the best accuracy,the substance in the manometer should

Assume that you have a mixture of nitrogen (molecular mass = 28 amu),represented by unshaded spheres,and chlorine (molecular mass = 71 amu),represented by shaded spheres at 300 K.Which of the drawings best represents the mixture?

A gas bottle contains 0.250 mol of gas at 730 mm Hg pressure.If the final pressure is 1.15 atm,how many moles of gas were added to the bottle?

A basketball is inflated to a pressure of 1.50 atm in a 20.0°C garage.What is the pressure of the basketball outside where the temperature is -5.00°C?

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains Ar,cylinder B contains Cl2,and cylinder C contains N2.According to the kinetic molecular theory,which gas has the highest density?

When 15.0 g of zinc metal reacts with excess HCl,how many liters of H2 gas are produced at STP?

One mole of which gas has the greatest density at STP?

The molecule believed to be most responsible for global warming is ________.

What is the temperature of CO2 gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?

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

A 75.0 L steel tank at 20.0°C contains acetylene gas,C₂H₂,at a pressure of 1.39 atm.Assuming ideal behavior,how many grams of acetylene are in the tank?

If CO₂ and NH₃ are allowed to effuse through a porous membrane under identical conditions,the rate of effusion for NH₃ will be ________ times that of CO₂.

If 1.0 mol of N₂ and 3.0 mol of H₂in a closed container initially at STP react completely in the reaction shown below,then the final pressure in the flask will be ________ atm at 273 K. N₂(g)+ 3 H₂(g)→ 2 NH₃(g)

Each of three identical 15.0-L gas cylinders contains 7.50 mol of gas at 295 K.Cylinder A contains Ar,cylinder B contains Cl₂,and cylinder C contains N₂.According to the kinetic molecular theory,which gas has the highest density?

When 15.0 g of zinc metal reacts with excess HCl,how many liters of H₂ gas are produced at STP?

What is the temperature of CO₂ gas if the average speed (actually the root-mean-square speed)of the molecules is 750 m/s?