Question 1

What is the vapor pressure of water at 80°C?

Accepted Answer

A)  0.48 atm 
B)  1.20 atm 
C)  2.00 atm 
D)  0.80 atm 
E)  1.00 atm 
A)  0.48 atm 
B)  1.20 atm 
C)  2.00 atm 
D)  0.80 atm 
E)  1.00 atm

Question 2

Which statement regarding water is true?

Accepted Answer

A)  Liquid water is less dense than solid water. 
B)  Only covalent bonds are broken when ice melts. 
C)  Hydrogen bonds are stronger than covalent bonds. 
D)  Energy must be given off in order to break down the crystal lattice of ice to a liquid. 
E)  All of these statements are false. 
A)  Liquid water is less dense than solid water. 
B)  Only covalent bonds are broken when ice melts. 
C)  Hydrogen bonds are stronger than covalent bonds. 
D)  Energy must be given off in order to break down the crystal lattice of ice to a liquid. 
E)  All of these statements are false.

Question 3

ΔHvap for water is 40.7 kJ/mol. Calculate the boiling point of water at 0.500 atm.

Accepted Answer

A)  50.0°C 
B)  81.3°C 
C)  100.0°C 
D)  98.6°C 
E)  none of these 
A)  50.0°C 
B)  81.3°C 
C)  100.0°C 
D)  98.6°C 
E)  none of these

Question 4

Which of the following is the smallest hole in a closest-packed lattice of spheres?

Accepted Answer

A)  trigonal 
B)  cubic 
C)  tetrahedral 
D)  octahedral 
E)  none of these 
A)  trigonal 
B)  cubic 
C)  tetrahedral 
D)  octahedral 
E)  none of these

Question 5

How much energy is needed to convert 60.6 grams of ice at 0.00°C to water at 55.4°C?
Specific heat of ice = 2.10 J/(g°C)
Specific heat of water = 4.18 J/(g°C)
Heat of fusion = 333 J/g
Heat of vaporization = 2258 J/g

Accepted Answer

A)  56.4 kJ 
B)  14.0 kJ 
C)  151 kJ 
D)  34.2 kJ 
E)  6.13 kJ 
A)  56.4 kJ 
B)  14.0 kJ 
C)  151 kJ 
D)  34.2 kJ 
E)  6.13 kJ

Question 6

What is the radius of the largest sphere that can be placed at the center of a face-centered cubic unit cell of a cubic closest-packed array of spheres if the spheres have diameters of 4.00 × 102 pm?

Accepted Answer

A)  2.0 × 102 pm 
B)  41.5 pm 
C)  83.0 pm 
D)  4.0 × 102 pm 
E)  none of these 
A)  2.0 × 102 pm 
B)  41.5 pm 
C)  83.0 pm 
D)  4.0 × 102 pm 
E)  none of these

Question 7

You are given a small bar of an unknown metal, X. You find the density of the metal to be 10.5 g/cm3. An X-ray diffraction experiment measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered cubic lattice, what is X most likely to be?

Accepted Answer

A)  Ag 
B)  Pt 
C)  Rh 
D)  Pb 
E)  none of these 
A)  Ag 
B)  Pt 
C)  Rh 
D)  Pb 
E)  none of these

Question 8

The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Accepted Answer

Question 9

Which of the following statements is true about p-type silicon?

Accepted Answer

A)  Electrons are the mobile charge carriers. 
B)  It is produced by doping Si with P or As. 
C)  It does not conduct electricity as well as pure Si. 
D)  All are true. 
E)  None is true. 
A)  Electrons are the mobile charge carriers. 
B)  It is produced by doping Si with P or As. 
C)  It does not conduct electricity as well as pure Si. 
D)  All are true. 
E)  None is true.

Question 10

KCl crystallizes in a structure like NaCl. The ionic radius of Na+ is 0.525 times the ionic radius of Cl- and 0.714 times the ionic radius of K+.A. Estimate the ratio of the unit cell edge length for KCl to that for NaCl.B. Estimate the ratio of the density of NaCl to that of KCl.

Accepted Answer

Question 11

A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most likely to be

Accepted Answer

A)  Cr 
B)  NO2 
C)  NaCl 
D)  I2 
E)  H2O 
A)  Cr 
B)  NO2 
C)  NaCl 
D)  I2 
E)  H2O

Question 12

The heat of vaporization of a certain refrigerant is 156 J/g. Calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one-ounce (1 oz = 28 g) ice cubes starting with the water at 13°C.Heat capacity (water) = 4.184 J/g °C
ΔHfusion (water) = 333 J/g

Accepted Answer

A)  0.85 kg 
B)  1.2 kg 
C)  4.3 kg 
D)  1.1 kg 
E)  0.17 kg 
A)  0.85 kg 
B)  1.2 kg 
C)  4.3 kg 
D)  1.1 kg 
E)  0.17 kg

Question 13

The normal boiling point of liquid X is less than that of Y, which is less than that of Z. Which of the following is the correct order of increasing vapor pressure of the three liquids at STP?

Accepted Answer

A)  Z, Y, X 
B)  Y, Z, X 
C)  X, Z, Y 
D)  Y, X, Z 
E)  X, Y, Z 
A)  Z, Y, X 
B)  Y, Z, X 
C)  X, Z, Y 
D)  Y, X, Z 
E)  X, Y, Z

Question 14

Pure rubidium crystallizes in a body-centered cubic lattice; the edge length of the unit cell is 562 pm. What is the density of rubidium in grams per cubic centimeter?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 15

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11 × 108 pm3. What is the density of copper metal?

Accepted Answer

A)  5.14 g/cm3 
B)  373 g/cm3 
C)  10.3 g/cm3 
D)  2.57 g/cm3 
E)  62 g/cm3 
A)  5.14 g/cm3 
B)  373 g/cm3 
C)  10.3 g/cm3 
D)  2.57 g/cm3 
E)  62 g/cm3

Question 16

When 1.00 mol of a pure liquid is vaporized at a constant pressure of 1.00 atm and at its boiling point of 320.0 K, 28.80 kJ of energy (heat) is absorbed and the volume change is +24.90 L. What is ΔE for this process? (1 L-atm = 101.3 J)

Accepted Answer

A)  26.28 kJ 
B)  31.32 kJ 
C)  -31.32 kJ 
D)  -2.49 × 103 kJ 
E)  -26.28 kJ 
A)  26.28 kJ 
B)  31.32 kJ 
C)  -31.32 kJ 
D)  -2.49 × 103 kJ 
E)  -26.28 kJ

Question 17

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

Accepted Answer

A)  The graph does not give this information. 
B)  98°C 
C)  77°C 
D)  60°C 
E)  34°C 
A)  The graph does not give this information. 
B)  98°C 
C)  77°C 
D)  60°C 
E)  34°C

Question 18

A salt, MY, crystallizes in a body-centered cubic structure with a Y- anion at each cube corner and an M+ cation at the cube center. Assuming that the Y- anions touch each other and the M+ cation at the center, and that the radius of Y- is 1.44 × 102 pm, what is the radius of M+?

Accepted Answer

A)  72.0 pm 
B)  48.0 pm 
C)  105 pm 
D)  37.4 pm 
E)  59.6 pm 
A)  72.0 pm 
B)  48.0 pm 
C)  105 pm 
D)  37.4 pm 
E)  59.6 pm

Question 19

Knowing that ΔHvap for water is 40.7 kJ/mol, calculate Pvap of water at 37°C.

Accepted Answer

A)  12.4 torr 
B)  52.6 torr 
C)  18.7 torr 
D)  6.90 torr 
E)  25.4 torr 
A)  12.4 torr 
B)  52.6 torr 
C)  18.7 torr 
D)  6.90 torr 
E)  25.4 torr

Question 20

The table below lists the ionic radii for the cations and anions in three ionic compounds.   
Each compound has a cubic structure like NaCl, CsCl, or ZnS. Use the ratio of cation radius to anion radius to predict the structure formed (that of NaCl, CsCl, or ZnS). Then estimate the density of each compound. For ZnS structures, the holes occupied lie along the body diagonals of the unit cell so that 1/4 (body diagonal) = r+ + r-.

Accepted Answer

SnO₂: NaCl structure; 6.66 g/cm

What is the vapor pressure of water at 80°C?

Which statement regarding water is true?

ΔH_vap for water is 40.7 kJ/mol. Calculate the boiling point of water at 0.500 atm.

Which of the following is the smallest hole in a closest-packed lattice of spheres?

How much energy is needed to convert 60.6 grams of ice at 0.00°C to water at 55.4°C? Specific heat of ice = 2.10 J/(g°C) Specific heat of water = 4.18 J/(g°C) Heat of fusion = 333 J/g Heat of vaporization = 2258 J/g

What is the radius of the largest sphere that can be placed at the center of a face-centered cubic unit cell of a cubic closest-packed array of spheres if the spheres have diameters of 4.00 × 10² pm?

You are given a small bar of an unknown metal, X. You find the density of the metal to be 10.5 g/cm³. An X-ray diffraction experiment measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered cubic lattice, what is X most likely to be?

The heat of combustion of bituminous coal is 2.5 × 10⁴ J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Which of the following statements is true about p-type silicon?

KCl crystallizes in a structure like NaCl. The ionic radius of Na⁺ is 0.525 times the ionic radius of Cl^- and 0.714 times the ionic radius of K⁺.A. Estimate the ratio of the unit cell edge length for KCl to that for NaCl.B. Estimate the ratio of the density of NaCl to that of KCl.

A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most likely to be

The heat of vaporization of a certain refrigerant is 156 J/g. Calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one-ounce (1 oz = 28 g) ice cubes starting with the water at 13°C.Heat capacity (water) = 4.184 J/g °C ΔH_fusion (water) = 333 J/g

The normal boiling point of liquid X is less than that of Y, which is less than that of Z. Which of the following is the correct order of increasing vapor pressure of the three liquids at STP?

Pure rubidium crystallizes in a body-centered cubic lattice; the edge length of the unit cell is 562 pm. What is the density of rubidium in grams per cubic centimeter?

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11 × 10⁸ pm³. What is the density of copper metal?

When 1.00 mol of a pure liquid is vaporized at a constant pressure of 1.00 atm and at its boiling point of 320.0 K, 28.80 kJ of energy (heat) is absorbed and the volume change is +24.90 L. What is ΔE for this process? (1 L-atm = 101.3 J)

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

A salt, MY, crystallizes in a body-centered cubic structure with a Y^- anion at each cube corner and an M⁺ cation at the cube center. Assuming that the Y^- anions touch each other and the M⁺ cation at the center, and that the radius of Y^- is 1.44 × 10² pm, what is the radius of M⁺?

Knowing that ΔH_vap for water is 40.7 kJ/mol, calculate P_vap of water at 37°C.

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

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Organic and Biochemical Molecules

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Exam 16: Liquids and Solids

What is the vapor pressure of water at 80°C?

Which statement regarding water is true?

ΔHvap for water is 40.7 kJ/mol. Calculate the boiling point of water at 0.500 atm.

Which of the following is the smallest hole in a closest-packed lattice of spheres?

How much energy is needed to convert 60.6 grams of ice at 0.00°C to water at 55.4°C? Specific heat of ice = 2.10 J/(g°C) Specific heat of water = 4.18 J/(g°C) Heat of fusion = 333 J/g Heat of vaporization = 2258 J/g

What is the radius of the largest sphere that can be placed at the center of a face-centered cubic unit cell of a cubic closest-packed array of spheres if the spheres have diameters of 4.00 × 102 pm?

You are given a small bar of an unknown metal, X. You find the density of the metal to be 10.5 g/cm3. An X-ray diffraction experiment measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered cubic lattice, what is X most likely to be?

The heat of combustion of bituminous coal is 2.5 × 104 J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

Which of the following statements is true about p-type silicon?

KCl crystallizes in a structure like NaCl. The ionic radius of Na+ is 0.525 times the ionic radius of Cl- and 0.714 times the ionic radius of K+.A. Estimate the ratio of the unit cell edge length for KCl to that for NaCl.B. Estimate the ratio of the density of NaCl to that of KCl.

A certain solid substance that is very hard, has a high melting point, and is nonconducting unless melted is most likely to be

The heat of vaporization of a certain refrigerant is 156 J/g. Calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one-ounce (1 oz = 28 g) ice cubes starting with the water at 13°C.Heat capacity (water) = 4.184 J/g °C ΔHfusion (water) = 333 J/g

The normal boiling point of liquid X is less than that of Y, which is less than that of Z. Which of the following is the correct order of increasing vapor pressure of the three liquids at STP?

Pure rubidium crystallizes in a body-centered cubic lattice; the edge length of the unit cell is 562 pm. What is the density of rubidium in grams per cubic centimeter?

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11 × 108 pm3. What is the density of copper metal?

When 1.00 mol of a pure liquid is vaporized at a constant pressure of 1.00 atm and at its boiling point of 320.0 K, 28.80 kJ of energy (heat) is absorbed and the volume change is +24.90 L. What is ΔE for this process? (1 L-atm = 101.3 J)

Given the graph below, what is the boiling point of carbon tetrachloride at standard pressure?

A salt, MY, crystallizes in a body-centered cubic structure with a Y- anion at each cube corner and an M+ cation at the cube center. Assuming that the Y- anions touch each other and the M+ cation at the center, and that the radius of Y- is 1.44 × 102 pm, what is the radius of M+?

Knowing that ΔHvap for water is 40.7 kJ/mol, calculate Pvap of water at 37°C.

Atoms, Molecules, and Ions

Stoichiometry

Types of Chemical Reactions and Solution Stoichiometry

Gases

Chemical Equilibrium

Acids and Bases

Applications of Aqueous Equilibria

Energy, Enthalpy, and Thermochemistry

Spontaneity, Entropy, and Free Energy

Electrochemistry

Quantum Mechanics and Atomic Theory

Bonding: General Concepts

Covalent Bonding: Orbitals

Chemical Kinetics

Properties of Solutions

The Representative Elements

Transition Metals and Coordination Chemistry

The Nucleus: a Chemists View

Organic and Biochemical Molecules

Filters

ΔH_vap for water is 40.7 kJ/mol. Calculate the boiling point of water at 0.500 atm.

What is the radius of the largest sphere that can be placed at the center of a face-centered cubic unit cell of a cubic closest-packed array of spheres if the spheres have diameters of 4.00 × 10² pm?

You are given a small bar of an unknown metal, X. You find the density of the metal to be 10.5 g/cm³. An X-ray diffraction experiment measures the edge of the unit cell as 409 pm. Assuming that the metal crystallizes in a face-centered cubic lattice, what is X most likely to be?

The heat of combustion of bituminous coal is 2.5 × 10⁴ J/g. What quantity of the coal is required to produce the energy to convert 100. lb of ice at 0°C to steam at 100°C?

KCl crystallizes in a structure like NaCl. The ionic radius of Na⁺ is 0.525 times the ionic radius of Cl^- and 0.714 times the ionic radius of K⁺.A. Estimate the ratio of the unit cell edge length for KCl to that for NaCl.B. Estimate the ratio of the density of NaCl to that of KCl.

The heat of vaporization of a certain refrigerant is 156 J/g. Calculate the number of kilograms of refrigerant that must be evaporated to freeze a tray of 17 one-ounce (1 oz = 28 g) ice cubes starting with the water at 13°C.Heat capacity (water) = 4.184 J/g °C ΔH_fusion (water) = 333 J/g

Metallic copper crystallizes in a face-centered cubic lattice. The volume of the unit cell is 4.11 × 10⁸ pm³. What is the density of copper metal?

A salt, MY, crystallizes in a body-centered cubic structure with a Y^- anion at each cube corner and an M⁺ cation at the cube center. Assuming that the Y^- anions touch each other and the M⁺ cation at the center, and that the radius of Y^- is 1.44 × 10² pm, what is the radius of M⁺?

Knowing that ΔH_vap for water is 40.7 kJ/mol, calculate P_vap of water at 37°C.