Question 1

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Accepted Answer

A)  There are two atoms per unit cell. 
B)  The solid has a cubic closest-packed structure. 
C)  It will conduct electricity. 
D)  The number of atoms surrounding each Cu atom is 12. 
E)  The length of a face diagonal is four times the Cu radius. 
A)  There are two atoms per unit cell. 
B)  The solid has a cubic closest-packed structure. 
C)  It will conduct electricity. 
D)  The number of atoms surrounding each Cu atom is 12. 
E)  The length of a face diagonal is four times the Cu radius. A

Question 2

Properties of liquids lie (closer to/further from) properties of a solid than to (or from) properties of a gas.

Accepted Answer

A)  closer to 
B)  further from 
A)  closer to 
B)  further from A

Question 3

Which of the following is the correct order of boiling points for NaNO3, CH3OH, C3H8, and He?

Accepted Answer

A)  He 3H8 3 3OH 
B)  He 3H8 3OH 3 
C)  He 3OH 3H8 3 
D)  NaNO3 3OH 3H8 3H8 3OH 3 
A)  He 3H8 3 3OH 
B)  He 3H8 3OH 3 
C)  He 3OH 3H8 3 
D)  NaNO3 3OH 3H8 3H8 3OH 3 B

Question 4

Shown below is a phase diagram for compound X. At 25°C and 1 atm, in what state will X exist?

Accepted Answer

A)  gas/solid at equilibrium. 
B)  liquid. 
C)  gas/liquid at equilibrium. 
D)  solid. 
E)  gas. 
A)  gas/solid at equilibrium. 
B)  liquid. 
C)  gas/liquid at equilibrium. 
D)  solid. 
E)  gas.

Question 5

In which of the following processes is energy evolved as heat?

Accepted Answer

A)  vaporization 
B)  crystallization 
C)  melting 
D)  sublimation 
E)  none of these 
A)  vaporization 
B)  crystallization 
C)  melting 
D)  sublimation 
E)  none of these

Question 6

If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (that is, in such a way that they touch each other), what fraction of the corresponding solid will be empty space? [The volume of a sphere is (4/3)πr3, with π = 3.14.]

Accepted Answer

A)  0.52 
B)  0.32 
C)  0.68 
D)  0.48 
E)  none of these 
A)  0.52 
B)  0.32 
C)  0.68 
D)  0.48 
E)  none of these

Question 7

Which of the following statements is(are) false?
I.The hexagonal closest-packed structure is ABAB....
II.A body-centered cubic unit cell has four atoms per unit cell.
III.For unit cells having the same edge length, a simple cubic structure would have a smaller density than a body-centered cube.
IV.Atoms in a solid consisting of only one element would have six nearest neighbors if the crystal structure was a simple cubic array.

Accepted Answer

A)  I only 
B)  I, IV 
C)  II, III, IV 
D)  II, III only 
E)  II only 
A)  I only 
B)  I, IV 
C)  II, III, IV 
D)  II, III only 
E)  II only

Question 8

A certain compound with a molar mass of 120.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 461 pm. What is the density of this compound?

Accepted Answer

A)  2.03 g/cm3 
B)  1.73 g/cm3 
C)  4.90 g/cm3 
D)  8.14 g/cm3 
E)  1.22 g/cm3 
A)  2.03 g/cm3 
B)  1.73 g/cm3 
C)  4.90 g/cm3 
D)  8.14 g/cm3 
E)  1.22 g/cm3

Question 9

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

Accepted Answer

The heat of vaporiza

Question 10

The triple point of a substance is

Accepted Answer

A)  the point at which the vapor pressure of the solid is 1 atm. 
B)  the point at which its solid, liquid, and vapor are all in equilibrium. 
C)  the point at which the liquid starts to condense as the temperature of the vapor is lowered. 
D)  the point at which the density of the solid and the liquid are equal. 
E)  none of these 
A)  the point at which the vapor pressure of the solid is 1 atm. 
B)  the point at which its solid, liquid, and vapor are all in equilibrium. 
C)  the point at which the liquid starts to condense as the temperature of the vapor is lowered. 
D)  the point at which the density of the solid and the liquid are equal. 
E)  none of these

Question 11

Brass is an example of

Accepted Answer

A)  a superconductor. 
B)  an interstitial alloy. 
C)  a network solid. 
D)  a substitutional alloy. 
E)  none of these 
A)  a superconductor. 
B)  an interstitial alloy. 
C)  a network solid. 
D)  a substitutional alloy. 
E)  none of these

Question 12

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. A large increase in pressure will

Accepted Answer

A)  lower the freezing point. 
B)  lower the boiling point. 
C)  lower the triple point. 
D)  raise the triple point. 
E)  raise the freezing point. 
A)  lower the freezing point. 
B)  lower the boiling point. 
C)  lower the triple point. 
D)  raise the triple point. 
E)  raise the freezing point.

Question 13

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

Accepted Answer

A)  increase T to 300 K, keeping P = 1.0 atm. 
B)  abandon the attempt to sublime X. 
C)  lower P to 0.5 atm and then increase T to 200 K. 
D)  increase P to 1.5 atm and then increase T to 300 K. 
E)  increase T to 300 K and then lower P to 0.5 atm. 
A)  increase T to 300 K, keeping P = 1.0 atm. 
B)  abandon the attempt to sublime X. 
C)  lower P to 0.5 atm and then increase T to 200 K. 
D)  increase P to 1.5 atm and then increase T to 300 K. 
E)  increase T to 300 K and then lower P to 0.5 atm.

Question 14

Identify the major attractive force in CaF2.

Accepted Answer

A)  ionic bonding 
B)  London dispersion forces 
C)  hydrogen bonding 
D)  dipole-dipole interactions 
E)  none of these 
A)  ionic bonding 
B)  London dispersion forces 
C)  hydrogen bonding 
D)  dipole-dipole interactions 
E)  none of these

Question 15

What is the net number of face-centered atoms contained in a face-centered cubic unit cell?

Accepted Answer

A)  6 
B)  1 
C)  3 
D)  4 
E)  none of these 
A)  6 
B)  1 
C)  3 
D)  4 
E)  none of these

Question 16

Which of the following chemical species has the highest boiling point?

Accepted Answer

A)  Ne 
B)  C2H6 
C)  Li2O 
D)  N2 
E)  NF3 
A)  Ne 
B)  C2H6 
C)  Li2O 
D)  N2 
E)  NF3

Question 17

The triple point of CO2 is at 5.2 atm and -57°C. Under atmospheric conditions present in a typical Boulder, Colorado, laboratory (P = 630 torr, T = 23° C), solid CO2 will

Accepted Answer

A)  remain solid. 
B)  melt. 
C)  boil. 
D)  sublime. 
E)  none of these 
A)  remain solid. 
B)  melt. 
C)  boil. 
D)  sublime. 
E)  none of these

Question 18

The molar volume of a certain form of solid lead is 18 cmS1U1P13S1S1P0/mol. Assuming cubic closest-packed structure, determine the following.
-The volume of a single cell

Accepted Answer

A)  1.20 × 106 pm3 
B)  1.20 × 108 pm3 
C)  1.20 × 104 pm3 
D)  1.20 × 102 pm3 
E)  none of these 
A)  1.20 × 106 pm3 
B)  1.20 × 108 pm3 
C)  1.20 × 104 pm3 
D)  1.20 × 102 pm3 
E)  none of these

Question 19

Which intermolecular force is the strongest?

Accepted Answer

A)  polar covalent bonds 
B)  ionic bonding 
C)  London dispersion forces 
D)  dipole-dipole interactions 
E)  hydrogen bonding 
A)  polar covalent bonds 
B)  ionic bonding 
C)  London dispersion forces 
D)  dipole-dipole interactions 
E)  hydrogen bonding

Question 20

Which of the following statements is/are true of carbon nanotubes?
1. Carbon nanotubes contain networks of carbon atoms in interconnected eight-membered rings organized into slender tubes.
2. Carbon nanotubes are lighter and stronger than steel wire.
3. Carbon nanotubes are better electrical conductors than copper wire.

Accepted Answer

A)  ​1 only 
B)  ​2 only 
C)  ​3 only 
D)  ​1 and 2 
E)  ​2 and 3 
A)  ​1 only 
B)  ​2 only 
C)  ​3 only 
D)  ​1 and 2 
E)  ​2 and 3

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Properties of liquids lie (closer to/further from) properties of a solid than to (or from) properties of a gas.

Which of the following is the correct order of boiling points for NaNO₃, CH₃OH, C₃H₈, and He?

Shown below is a phase diagram for compound X. At 25°C and 1 atm, in what state will X exist?

In which of the following processes is energy evolved as heat?

If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (that is, in such a way that they touch each other), what fraction of the corresponding solid will be empty space? [The volume of a sphere is (4/3)πr³, with π = 3.14.]

A certain compound with a molar mass of 120.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 461 pm. What is the density of this compound?

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

The triple point of a substance is

Brass is an example of

The density of the solid phase of a substance is 0.90 g/cm³ and the density of the liquid phase is 1.0 g/cm³. A large increase in pressure will

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

Identify the major attractive force in CaF₂.

What is the net number of face-centered atoms contained in a face-centered cubic unit cell?

Which of the following chemical species has the highest boiling point?

The triple point of CO₂ is at 5.2 atm and -57°C. Under atmospheric conditions present in a typical Boulder, Colorado, laboratory (P = 630 torr, T = 23° C), solid CO₂ will

The molar volume of a certain form of solid lead is 18 cm³/mol. Assuming cubic closest-packed structure, determine the following. -The volume of a single cell

Which intermolecular force is the strongest?

Atoms, Molecules, and Ions

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Types of Chemical Reactions and Solution Stoichiometry

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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

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Exam 16: Liquids and Solids

Which one of the following statements about solid Cu (face-centered cubic unit cell) is incorrect?

Properties of liquids lie (closer to/further from) properties of a solid than to (or from) properties of a gas.

Which of the following is the correct order of boiling points for NaNO3, CH3OH, C3H8, and He?

Shown below is a phase diagram for compound X. At 25°C and 1 atm, in what state will X exist?

In which of the following processes is energy evolved as heat?

If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (that is, in such a way that they touch each other), what fraction of the corresponding solid will be empty space? [The volume of a sphere is (4/3)πr3, with π = 3.14.]

A certain compound with a molar mass of 120.0 g/mol crystallizes with the sodium chloride (rock salt) structure. The length of an edge of the unit cell is 461 pm. What is the density of this compound?

Which is generally larger, the heat of fusion or the heat of vaporization for a given substance? Explain your answer.

The triple point of a substance is

Brass is an example of

The density of the solid phase of a substance is 0.90 g/cm3 and the density of the liquid phase is 1.0 g/cm3. A large increase in pressure will

Below is a phase diagram for compound X. You wish to purify a sample of X that was collected at P = 1.0 atm and T = 100 by subliming it. In order to sublime the sample, you should

Identify the major attractive force in CaF2.

What is the net number of face-centered atoms contained in a face-centered cubic unit cell?

Which of the following chemical species has the highest boiling point?

The triple point of CO2 is at 5.2 atm and -57°C. Under atmospheric conditions present in a typical Boulder, Colorado, laboratory (P = 630 torr, T = 23° C), solid CO2 will

The molar volume of a certain form of solid lead is 18 cm3/mol. Assuming cubic closest-packed structure, determine the following. -The volume of a single cell

Which intermolecular force is the strongest?

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

Which of the following is the correct order of boiling points for NaNO₃, CH₃OH, C₃H₈, and He?

If equal, rigid spheres are arranged in a simple cubic lattice in the usual way (that is, in such a way that they touch each other), what fraction of the corresponding solid will be empty space? [The volume of a sphere is (4/3)πr³, with π = 3.14.]

The density of the solid phase of a substance is 0.90 g/cm³ and the density of the liquid phase is 1.0 g/cm³. A large increase in pressure will

Identify the major attractive force in CaF₂.

The triple point of CO₂ is at 5.2 atm and -57°C. Under atmospheric conditions present in a typical Boulder, Colorado, laboratory (P = 630 torr, T = 23° C), solid CO₂ will

The molar volume of a certain form of solid lead is 18 cm³/mol. Assuming cubic closest-packed structure, determine the following. -The volume of a single cell