Question 1

Of the three cubic unit cells, which lattice packing leaves the least amount of free space in the cell?

Accepted Answer

A)  simple cubic 
B)  need cell dimensions to determine this 
C)  body centered cubic 
D)  face centered cubic 
A)  simple cubic 
B)  need cell dimensions to determine this 
C)  body centered cubic 
D)  face centered cubic

Question 2

Cs crystallizes in a body-centered cubic arrangement. Assuming that the dimensions of the unit cell for Cs and for CsCl are equivalent, determine the ratio of the density of Cs to the density of CsCl.

Accepted Answer

A)  1.58 
B)  2.79 
C)  1.00 
D)  0.789 
E)  none of these 
A)  1.58 
B)  2.79 
C)  1.00 
D)  0.789 
E)  none of these

Question 3

A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 434 pm. What is the diameter of the metal atom?

Accepted Answer

A)  434 pm 
B)  376 pm 
C)  614 pm 
D)  217 pm 
E)  307 pm 
A)  434 pm 
B)  376 pm 
C)  614 pm 
D)  217 pm 
E)  307 pm

Question 4

Which of the following is most likely to be a gas at room temperature?

Accepted Answer

A)  CH3OH 
B)  C8H18 
C)  K2O 
D)  O2 
E)  MgF2 
A)  CH3OH 
B)  C8H18 
C)  K2O 
D)  O2 
E)  MgF2

Question 5

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. Using radius ratios, predict the cubic structure that each compound is most likely to form (that of NaCl, CsCl, or ZnS), the type of holes filled by the cations, and the fraction of holes filled by cations.

Accepted Answer

SnO₂: NaCl structure; Sn⁴⁺ occupi

Question 6

Identify the true statement(s) of the liquid state of matter.
1. The resistance of a liquid to an increase in its surface area is called the viscosity of the liquid.
2. A polar liquid exhibits capillary action, the spontaneous rising of a liquid in a narrow tube.
3. A liquid with large intermolecular force tends to be highly viscous.

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

Question 7

What is the vapor pressure of water at 100.0°C?

Accepted Answer

A)  85 torr 
B)  175 torr 
C)  760 torr 
D)  1 torr 
E)  More information is needed. 
A)  85 torr 
B)  175 torr 
C)  760 torr 
D)  1 torr 
E)  More information is needed.

Question 8

Elemental magnesium crystallizes in a face-centered cubic lattice. The density of magnesium is 1.738 g/cm3. The unit cell length is 4.80 × 102 pm. What is the atomic radius of Mg?

Accepted Answer

A)  340 pm 
B)  215 pm 
C)  242 pm 
D)  126 pm 
E)  170 pm 
A)  340 pm 
B)  215 pm 
C)  242 pm 
D)  126 pm 
E)  170 pm

Question 9

Which of the following should have the highest boiling point?

Accepted Answer

A)  K2S 
B)  NF3 
C)  HF 
D)  C2H5OH 
E)  O2 
A)  K2S 
B)  NF3 
C)  HF 
D)  C2H5OH 
E)  O2

Question 10

​The positions of the components in a crystalline solid are usually represented by a _____, a three-dimensional array of points designating the centers of the components (atoms, ions, or molecules) that shows the repetitious pattern of the components.

Accepted Answer

A)  ​wattle 
B)  ​lattice 
C)  ​grid 
D)  ​mesh 
E)  ​matrix 
A)  ​wattle 
B)  ​lattice 
C)  ​grid 
D)  ​mesh 
E)  ​matrix

Question 11

The elements of Group 5A, the nitrogen family, form compounds with hydrogen that have the boiling points listed below.SbH3 -17°C, AsH3 -55°C, PH3 -87°C, NH3 -33°C
The first three elements illustrate a trend where the boiling point decreases as the mass decreases; however, ammonia (NH3) does not follow the trend because of

Accepted Answer

A)  ionic bonding. 
B)  hydrogen bonding. 
C)  metallic bonding. 
D)  dipole-dipole attraction. 
E)  London dispersion forces. 
A)  ionic bonding. 
B)  hydrogen bonding. 
C)  metallic bonding. 
D)  dipole-dipole attraction. 
E)  London dispersion forces.

Of the three cubic unit cells, which lattice packing leaves the least amount of free space in the cell?

Cs crystallizes in a body-centered cubic arrangement. Assuming that the dimensions of the unit cell for Cs and for CsCl are equivalent, determine the ratio of the density of Cs to the density of CsCl.

A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 434 pm. What is the diameter of the metal atom?

Which of the following is most likely to be a gas at room temperature?

What is the vapor pressure of water at 100.0°C?

Elemental magnesium crystallizes in a face-centered cubic lattice. The density of magnesium is 1.738 g/cm³. The unit cell length is 4.80 × 10² pm. What is the atomic radius of Mg?

Which of the following should have the highest boiling point?

The positions of the components in a crystalline solid are usually represented by a _____, a three-dimensional array of points designating the centers of the components (atoms, ions, or molecules) that shows the repetitious pattern of the components.

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

Exam 16: Liquids and Solids

Of the three cubic unit cells, which lattice packing leaves the least amount of free space in the cell?

Cs crystallizes in a body-centered cubic arrangement. Assuming that the dimensions of the unit cell for Cs and for CsCl are equivalent, determine the ratio of the density of Cs to the density of CsCl.

A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 434 pm. What is the diameter of the metal atom?

Which of the following is most likely to be a gas at room temperature?

What is the vapor pressure of water at 100.0°C?

Elemental magnesium crystallizes in a face-centered cubic lattice. The density of magnesium is 1.738 g/cm3. The unit cell length is 4.80 × 102 pm. What is the atomic radius of Mg?

Which of the following should have the highest boiling point?

​The positions of the components in a crystalline solid are usually represented by a _____, a three-dimensional array of points designating the centers of the components (atoms, ions, or molecules) that shows the repetitious pattern of the components.

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

Elemental magnesium crystallizes in a face-centered cubic lattice. The density of magnesium is 1.738 g/cm³. The unit cell length is 4.80 × 10² pm. What is the atomic radius of Mg?

The positions of the components in a crystalline solid are usually represented by a _____, a three-dimensional array of points designating the centers of the components (atoms, ions, or molecules) that shows the repetitious pattern of the components.