Question 1

The number of nearest neighbors (atoms that make contact) around each atom in a face-centered cubic lattice of a metal is

Accepted Answer

A)  2. 
B)  4. 
C)  6. 
D)  8. 
E)  12. 
A)  2. 
B)  4. 
C)  6. 
D)  8. 
E)  12.

Question 2

The structural form of the element Ge closely resembles the structure of

Accepted Answer

A)  C (diamond). 
B)  N (diatomic). 
C)  As (tetrahedral). 
D)  S (S8 ring). 
E)  Kr (monatomic). 
A)  C (diamond). 
B)  N (diatomic). 
C)  As (tetrahedral). 
D)  S (S8 ring). 
E)  Kr (monatomic).

Question 3

Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm3 at 27$\circ$C. Calculate the atomic radius of Pd.

Accepted Answer

A)  154 pm 
B)  138 pm 
C)  1.95 * 10-8 nm 
D)  0.109 nm 
E)  1.95 * 10-8 cm 
A)  154 pm 
B)  138 pm 
C)  1.95 * 10-8 nm 
D)  0.109 nm 
E)  1.95 * 10-8 cm

Question 4

Butter melts over a range of temperatures, rather than with a sharp melting point. Butter is classified as a/an

Accepted Answer

A)  metallic crystal. 
B)  covalent solid. 
C)  molecular crystal. 
D)  amorphous solid. 
E)  ionic crystal. 
A)  metallic crystal. 
B)  covalent solid. 
C)  molecular crystal. 
D)  amorphous solid. 
E)  ionic crystal.

Question 5

Ethanol (C2H5 - OH) will have a greater viscosity than ethylene glycol (HO - CH2CH2 - OH) at the same temperature.

Accepted Answer

A) True 
 B)False

Question 6

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91$\circ$C. What is the vapor pressure of BBr3 at 20$\circ$C

Accepted Answer

A)  11.5 torr 
B)  311 torr 
C)  5.31 torr 
D)  143 torr 
E)  66.1 torr 
A)  11.5 torr 
B)  311 torr 
C)  5.31 torr 
D)  143 torr 
E)  66.1 torr

Question 7

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point

Accepted Answer

A)  ethanol, bp = 78$\circ$C 
B)  methanol, bp = 65$\circ$C 
C)  water, bp = 100$\circ$C 
D)  benzene, bp = 80$\circ$C 
E)  The vapor pressure of each of the liquids at its normal boiling point would be the same. 
A)  ethanol, bp = 78$\circ$C 
B)  methanol, bp = 65$\circ$C 
C)  water, bp = 100$\circ$C 
D)  benzene, bp = 80$\circ$C 
E)  The vapor pressure of each of the liquids at its normal boiling point would be the same.

Question 8

Which of the following phase changes is endothermic

Accepted Answer

A)  Sublimation 
B)  Condensation 
C)  Freezing 
D)  Deposition 
A)  Sublimation 
B)  Condensation 
C)  Freezing 
D)  Deposition

Question 9

An example of a covalent network solid is

Accepted Answer

A)  diamond. 
B)  potassium. 
C)  iodine. 
D)  sodium chloride. 
E)  none of these. 
A)  diamond. 
B)  potassium. 
C)  iodine. 
D)  sodium chloride. 
E)  none of these.

Question 10

Use the graph of vapor pressure to determine the normal boiling point of O2.

Accepted Answer

A)  84 K 
B)  88 K 
C)  90 K 
D)  92 K 
E)  O2 doesn't boil because it is always a gas. 
A)  84 K 
B)  88 K 
C)  90 K 
D)  92 K 
E)  O2 doesn't boil because it is always a gas.

Question 11

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

Accepted Answer

A) True 
 B)False

Question 12

The normal boiling point of bromine is 58.8$\circ$C. Given that the vapor pressure of bromine is 75.0 torr at 2.5$\circ$C, calculate the molar enthalpy of vaporization of bromine.

Accepted Answer

A)  2.90 kJ/mol 
B)  3.57 kJ/mol 
C)  3.76 kJ/mol 
D)  29.7 kJ/mol 
E)  31.3 kJ/mol 
A)  2.90 kJ/mol 
B)  3.57 kJ/mol 
C)  3.76 kJ/mol 
D)  29.7 kJ/mol 
E)  31.3 kJ/mol

Question 13

Which one of the following substances will have both dispersion forces and dipole-dipole forces

Accepted Answer

A)  HCl 
B)  BCl3 
C)  Br2 
D)  H2 
E)  CO2 
A)  HCl 
B)  BCl3 
C)  Br2 
D)  H2 
E)  CO2

Question 14

NH3 has a higher boiling point than CH4.

Accepted Answer

A) True 
 B)False

Question 15

The intermolecular forces present in C6H6 include which of the following
I. dipole-dipole
II. ion-dipole
III. dispersion
IV. hydrogen bonding

Accepted Answer

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

Question 16

At a given temperature CCl4 has a weaker surface tension than H2O.

Accepted Answer

A) True 
 B)False

Question 17

H2S has stronger intermolecular forces of attraction than H2Se.

Accepted Answer

A) True 
 B)False

Question 18

The gas phase exists at the point labeled a.

Accepted Answer

A) True 
 B)False

Question 19

Indicate all the types of intermolecular forces of attraction in CH3OH(l).

Accepted Answer

A)  Dispersion and Dipole-dipole 
B)  Dipole-dipole and Ionic 
C)  Ion-dipole and Hydrogen bonding 
D)  Hydrogen bonding and Dispersion 
E)  Dispersion 
A)  Dispersion and Dipole-dipole 
B)  Dipole-dipole and Ionic 
C)  Ion-dipole and Hydrogen bonding 
D)  Hydrogen bonding and Dispersion 
E)  Dispersion

Question 20

At room temperature, honey is more viscous than mustard.

Accepted Answer

A) True 
 B)False

Exam 11: Intermolecular Forces and Liquids and Solids

The number of nearest neighbors (atoms that make contact) around each atom in a face-centered cubic lattice of a metal is

The structural form of the element Ge closely resembles the structure of

Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm3 at 27 ∘\circ∘ C. Calculate the atomic radius of Pd.

Butter melts over a range of temperatures, rather than with a sharp melting point. Butter is classified as a/an

Ethanol (C2H5 - OH) will have a greater viscosity than ethylene glycol (HO - CH2CH2 - OH) at the same temperature.

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91 ∘\circ∘ C. What is the vapor pressure of BBr3 at 20 ∘\circ∘ C

Given the following liquids and their boiling points, which has the highest vapor pressure at its normal boiling point

Which of the following phase changes is endothermic

An example of a covalent network solid is

Use the graph of vapor pressure to determine the normal boiling point of O2.

The shape of the water-to-glass meniscus results from the strong adhesive forces between glass and water.

The normal boiling point of bromine is 58.8 ∘\circ∘ C. Given that the vapor pressure of bromine is 75.0 torr at 2.5 ∘\circ∘ C, calculate the molar enthalpy of vaporization of bromine.

Which one of the following substances will have both dispersion forces and dipole-dipole forces

NH3 has a higher boiling point than CH4.

The intermolecular forces present in C6H6 include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

At a given temperature CCl4 has a weaker surface tension than H2O.

H2S has stronger intermolecular forces of attraction than H2Se.

The gas phase exists at the point labeled a.

Indicate all the types of intermolecular forces of attraction in CH3OH(l).

At room temperature, honey is more viscous than mustard.

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

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Palladium crystallizes in a face-centered cubic unit cell. Its density is 12.0 g/cm³ at 27^$\circ$C. Calculate the atomic radius of Pd.

Ethanol (C₂H₅ - OH) will have a greater viscosity than ethylene glycol (HO - CH₂CH₂ - OH) at the same temperature.

The molar enthalpy of vaporization of boron tribromide is 30.5 kJ/mol, and its normal boiling point is 91^$\circ$C. What is the vapor pressure of BBr₃ at 20^$\circ$C

Use the graph of vapor pressure to determine the normal boiling point of O₂.

The normal boiling point of bromine is 58.8^$\circ$C. Given that the vapor pressure of bromine is 75.0 torr at 2.5^$\circ$C, calculate the molar enthalpy of vaporization of bromine.

NH₃ has a higher boiling point than CH₄.

The intermolecular forces present in C₆H₆ include which of the following I. dipole-dipole II. ion-dipole III. dispersion IV. hydrogen bonding

At a given temperature CCl₄ has a weaker surface tension than H₂O.

H₂S has stronger intermolecular forces of attraction than H₂Se.

Indicate all the types of intermolecular forces of attraction in CH₃OH(l).