Question 1

A metal with a body-centered cubic lattice will have ______ atom(s)  per unit cell.

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   9

Question 2

Which one of the following statements about unit cells and packing in solids is incorrect?

Accepted Answer

A)   In any unit cell of a solid crystal, each face of the cell must have an opposite face which is equal and parallel to it.
B)   The faces of a unit cell must all be at angles of 90 °\degree° to each other.
C)   The coordination number of atoms in a close packed metal is 12.
D)   The packing efficiency in fcc structures is higher than in bcc structures.
E)   The packing efficiency in fcc and hcp structures is the same.

Question 3

When liquid bromine is cooled to form a solid, which of the following types of solid would it form?

Accepted Answer

A)   atomic
B)   metallic
C)   molecular
D)   ionic
E)   covalent network

Question 4

Which of the following pairs of substances is arranged so that the one with higher viscosity is listed first?

Accepted Answer

A)   
B)   
C)   
D)   
E)   None of these choices is correct.

Question 5

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45 °\degree° C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure?

Accepted Answer

A)   > 50.0 torr
B)   50.0 torr
C)   25.0 torr
D)   The mass of the octane vapor is needed to calculate the vapor pressure.
E)   The external pressure is needed to calculate the vapor pressure.

Question 6

The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point. The heat of vaporization for ether is 26.69 kJ/mol.

Accepted Answer

A)   305 K
B)   302 K
C)   295 K
D)   289 K
E)   281 K

Question 7

A temperature increase causes __________________ in the conductivity of a semiconductor.

Accepted Answer

A)   a decrease
B)   an increase
C)   a modulation
D)   an increase or decrease (depending on the semiconductor) 
E)   no change

Question 8

The phase diagram of a substance shows the energy changes associated with changes of state.

Accepted Answer

A) True 
 B)False

Question 9

All gases can be liquefied at room temperature simply by increasing the pressure on the gas.

Accepted Answer

A) True 
 B)False

Question 10

A liquid may be made to boil at room temperature, simply be lowering the pressure.

Accepted Answer

A) True 
 B)False

Question 11

A temperature increase causes __________________ in the conductivity of a conductor.

Accepted Answer

A)   a decrease
B)   an increase
C)   an increase or decrease (depending on the conductor) 
D)   a modulation
E)   no change

Question 12

In cubic closest packing, the unit cell is body-centered cubic.

Accepted Answer

A) True 
 B)False

Question 13

Of the five major types of crystalline solid, which would you expect each of the following to form? (e.g., H2O: molecular)
A) Sn
B) Si
C) KCl
D) Xe
E) F2

Accepted Answer

A) metallic
B) netw...

Question 14

Which of the following pairs is arranged with the particle of higher polarizability listed first?

Accepted Answer

A)   Se2-, S2-
B)   I, I-
C)   Mg2+, Mg
D)   Br, I
E)   None of these choices is correct.

Question 15

The meniscus of mercury in a glass capillary tube is convex because of

Accepted Answer

A)   the very high density of mercury as compared with water.
B)   the low surface tension of mercury.
C)   the greater attraction of mercury atoms to the glass than to each other.
D)   the weaker attraction of mercury atoms to the glass than to each other.
E)   electrostatic repulsion between the glass and the mercury.

Question 16

Only molecules which do not have dipole moments can experience dispersion forces.

Accepted Answer

A) True 
 B)False

Question 17

Ammonia's unusually high melting point is the result of

Accepted Answer

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

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45 $\degree$ C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure?

Correct Answer
verified

A metal with a body-centered cubic lattice will have ______ atom(s) per unit cell.

Correct Answer
verified

Of the five major types of crystalline solid, which would you expect each of the following to form? (e.g., H₂O: molecular) A) Sn B) Si C) KCl D) Xe E) F₂

Correct Answer
verified
A) metallic
B) netw...
View Answer

In cubic closest packing, the unit cell is body-centered cubic.

Correct Answer
verified

When liquid bromine is cooled to form a solid, which of the following types of solid would it form?

Correct Answer
verified

Which one of the following statements about unit cells and packing in solids is incorrect?

Correct Answer
verified

Which of the following pairs of substances is arranged so that the one with higher viscosity is listed first?

Correct Answer
verified

All gases can be liquefied at room temperature simply by increasing the pressure on the gas.

Correct Answer
verified

The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point. The heat of vaporization for ether is 26.69 kJ/mol.

Correct Answer
verified

Only molecules which do not have dipole moments can experience dispersion forces.

Correct Answer
verified

The meniscus of mercury in a glass capillary tube is convex because of

Correct Answer
verified

A temperature increase causes __________________ in the conductivity of a semiconductor.

Correct Answer
verified

A temperature increase causes __________________ in the conductivity of a conductor.

Correct Answer
verified

A liquid may be made to boil at room temperature, simply be lowering the pressure.

Correct Answer
verified

Which of the following pairs is arranged with the particle of higher polarizability listed first?

Correct Answer
verified

The phase diagram of a substance shows the energy changes associated with changes of state.

Correct Answer
verified

Ammonia's unusually high melting point is the result of

Correct Answer
verified

Exam 12: Intermolecular Forces: Liquids, Solids, and Phase Changes

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45 °\degree° C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure?

Correct AnswerverifiedShow Answer

A metal with a body-centered cubic lattice will have ______ atom(s) per unit cell.

Correct AnswerverifiedShow Answer

Of the five major types of crystalline solid, which would you expect each of the following to form? (e.g., H2O: molecular) A) Sn B) Si C) KCl D) Xe E) F2

Correct AnswerverifiedA) metallic B) netw...View AnswerShow Answer

In cubic closest packing, the unit cell is body-centered cubic.

Correct AnswerverifiedShow Answer

When liquid bromine is cooled to form a solid, which of the following types of solid would it form?

Correct AnswerverifiedShow Answer

Which one of the following statements about unit cells and packing in solids is incorrect?

Correct AnswerverifiedShow Answer

Which of the following pairs of substances is arranged so that the one with higher viscosity is listed first?

Correct AnswerverifiedShow Answer

All gases can be liquefied at room temperature simply by increasing the pressure on the gas.

Correct AnswerverifiedShow Answer

The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point. The heat of vaporization for ether is 26.69 kJ/mol.

Correct AnswerverifiedShow Answer

Only molecules which do not have dipole moments can experience dispersion forces.

Correct AnswerverifiedShow Answer

The meniscus of mercury in a glass capillary tube is convex because of

Correct AnswerverifiedShow Answer

A temperature increase causes __________________ in the conductivity of a semiconductor.

Correct AnswerverifiedShow Answer

A temperature increase causes __________________ in the conductivity of a conductor.

Correct AnswerverifiedShow Answer

A liquid may be made to boil at room temperature, simply be lowering the pressure.

Correct AnswerverifiedShow Answer

Which of the following pairs is arranged with the particle of higher polarizability listed first?

Correct AnswerverifiedShow Answer

The phase diagram of a substance shows the energy changes associated with changes of state.

Correct AnswerverifiedShow Answer

Ammonia's unusually high melting point is the result of

Correct AnswerverifiedShow Answer

A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45 $\degree$ C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure?

Correct Answer
verified

Correct Answer
verified

Of the five major types of crystalline solid, which would you expect each of the following to form? (e.g., H₂O: molecular) A) Sn B) Si C) KCl D) Xe E) F₂

Correct Answer
verified
A) metallic
B) netw...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified