Question 1

What name is given to the phenomenon where a thin film of water contracts and adheres to the wall of a glass cylinder?

Accepted Answer

A) Surface tension 
B) Adhesion 
C) Polarity 
D) Capillary action 
E) Cohesion 
A) Surface tension 
B) Adhesion 
C) Polarity 
D) Capillary action 
E) Cohesion D

Question 2

Which statement concerning the vapor pressures of water and methanol (CH3OH)is true?

Accepted Answer

A) At 25ºC,methanol has a higher vapor pressure than water because methanol has a lower normal boiling point than water. 
B) At 25ºC,methanol has a higher vapor pressure than water because methanol is a poorer solvent than water. 
C) At 25ºC,methanol has a higher vapor pressure than water because methanol is a less viscous liquid than water. 
D) At 25ºC,methanol has a higher vapor pressure than water because the density of methanol is less than the density of water. 
E) At 25ºC,methanol has a higher vapor pressure than water because methanol has weaker intermolecular forces than water. 
A) At 25ºC,methanol has a higher vapor pressure than water because methanol has a lower normal boiling point than water. 
B) At 25ºC,methanol has a higher vapor pressure than water because methanol is a poorer solvent than water. 
C) At 25ºC,methanol has a higher vapor pressure than water because methanol is a less viscous liquid than water. 
D) At 25ºC,methanol has a higher vapor pressure than water because the density of methanol is less than the density of water. 
E) At 25ºC,methanol has a higher vapor pressure than water because methanol has weaker intermolecular forces than water. E

Question 3

Which of the following is defined as the attractive forces between polar molecules? I.dispersion forces
II)dipole-dipole interactions
III)ion-dipole interactions

Accepted Answer

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

Question 4

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Accepted Answer

A) True 
 B)False

Question 5

Arrange the following in order of increasing boiling point: RbCl,CH3Cl,CH3OH,CH4.

Accepted Answer

A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3 Cl 3 OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl 
A) CH3OH 3Cl 4 
B) CH3OH 4 3Cl 3 Cl 3 OH 4 
D) CH4 3OH 3Cl 4 3Cl 3OH < RbCl

Question 6

The location that indicates conditions under which two phases can exist in equilibrium is called the

Accepted Answer

A) triple point. 
B) critical point. 
C) phase boundary. 
D) phase diagram. 
E) transition state. 
A) triple point. 
B) critical point. 
C) phase boundary. 
D) phase diagram. 
E) transition state.

Question 7

Crystals of elemental sulfur are easily crushed,and melt at 113°C.Liquid sulfur does not conduct electricity.What kind of crystal is this?

Accepted Answer

The answer of Crystals of elemental sulfur are easily crushed,and...

Question 8

Which substance will exhibit hydrogen bonding between molecules?

Accepted Answer

A) (CH3)3N 
B) CH3-O-CH3 
C) CH3CH2-OH 
D) CH3CH2-F 
E) HI 
A) (CH3)3N 
B) CH3-O-CH3 
C) CH3CH2-OH 
D) CH3CH2-F 
E) HI

Question 9

a.Name the two unit cells which occur in close packing of identical atoms.
b.Briefly explain how the two types of close-packed lattices of identical atoms differ,in terms of atomic arrangements.

Accepted Answer

a.face-centered cubic; hexagonal b.Cubic

Question 10

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure.The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Accepted Answer

A) 0.244 g/cm3 
B) 1.02 g/cm3 
C) 2.05 g/cm3 
D) 4.09 g/cm3 
E) 8.18 g/cm3 
A) 0.244 g/cm3 
B) 1.02 g/cm3 
C) 2.05 g/cm3 
D) 4.09 g/cm3 
E) 8.18 g/cm3

Question 11

Which corresponds to the temperature-dependent partial pressure above the surface of a liquid?

Accepted Answer

A) Surface tension 
B) Vapor pressure 
C) Boiling point 
D) Viscosity 
E) Capillary action 
A) Surface tension 
B) Vapor pressure 
C) Boiling point 
D) Viscosity 
E) Capillary action

Question 12

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

Question 13

Lead crystallizes in the face-centered cubic lattice.What is the coordination number for Pb?

Accepted Answer

A) 4 
B) 6 
C) 8 
D) 10 
E) 12 
A) 4 
B) 6 
C) 8 
D) 10 
E) 12

Question 14

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I2

Accepted Answer

A) is more dense than I2(s). 
B) cannot exist above 115°C. 
C) is liquid at room temperature. 
D) cannot have a vapor pressure less than 91 torr. 
E) sublimes at high pressure. 
A) is more dense than I2(s). 
B) cannot exist above 115°C. 
C) is liquid at room temperature. 
D) cannot have a vapor pressure less than 91 torr. 
E) sublimes at high pressure.

Question 15

What is the name given to the attractive forces that hold particles together in the condensed phase?

Accepted Answer

A) ionic bonds 
B) covalent bonds 
C) intermolecular forces 
D) electronegativity 
E) electron attraction 
A) ionic bonds 
B) covalent bonds 
C) intermolecular forces 
D) electronegativity 
E) electron attraction

Question 16

________________ _________ are the attractions that hold particles together in condensed phases.

Accepted Answer

Intermolec

Question 17

What name is given to a quantitative measure of the elastic force in the surface of a liquid?

Accepted Answer

A) Surface tension 
B) Adhesion 
C) Polarity 
D) Capillary action 
E) Cohesion 
A) Surface tension 
B) Adhesion 
C) Polarity 
D) Capillary action 
E) Cohesion

Question 18

Which are considered van der Waals forces? I.dispersion forces
II)dipole-dipole interactions
III)hydrogen bonding

Accepted Answer

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

Question 19

The molar enthalpy of vaporization of hexane (C6H14)is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Accepted Answer

A) 171 torr 
B) 4.44 torr 
C) 117 torr 
D) 3370 torr 
E) 759 torr 
A) 171 torr 
B) 4.44 torr 
C) 117 torr 
D) 3370 torr 
E) 759 torr

Question 20

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm3 at 27°C.What is the atomic radius of Pd?

Accepted Answer

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

Exam 11: Intermolecular Forces and the Physical Properties of Liquids and Solids

What name is given to the phenomenon where a thin film of water contracts and adheres to the wall of a glass cylinder?

Which statement concerning the vapor pressures of water and methanol (CH3OH)is true?

Which of the following is defined as the attractive forces between polar molecules? I.dispersion forces II)dipole-dipole interactions III)ion-dipole interactions

The energy of a hydrogen bond is greater than that of a typical covalent bond.

Arrange the following in order of increasing boiling point: RbCl,CH3Cl,CH3OH,CH4.

The location that indicates conditions under which two phases can exist in equilibrium is called the

Crystals of elemental sulfur are easily crushed,and melt at 113°C.Liquid sulfur does not conduct electricity.What kind of crystal is this?

Which substance will exhibit hydrogen bonding between molecules?

a.Name the two unit cells which occur in close packing of identical atoms. b.Briefly explain how the two types of close-packed lattices of identical atoms differ,in terms of atomic arrangements.

The zincblende structure of ZnS has the relatively large sulfide ions arranged at the lattice points of a face-centered cubic structure.The edge length of this cubic unit cell is 540.9 pm.Determine the density of zincblende.

Which corresponds to the temperature-dependent partial pressure above the surface of a liquid?

Ammonia's unusually high melting point is the result of

Lead crystallizes in the face-centered cubic lattice.What is the coordination number for Pb?

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I2

What is the name given to the attractive forces that hold particles together in the condensed phase?

________________ _________ are the attractions that hold particles together in condensed phases.

What name is given to a quantitative measure of the elastic force in the surface of a liquid?

Which are considered van der Waals forces? I.dispersion forces II)dipole-dipole interactions III)hydrogen bonding

The molar enthalpy of vaporization of hexane (C6H14)is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm3 at 27°C.What is the atomic radius of Pd?

Chemistry: the Central Science

Atoms Molecules and Ions

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Chemical Bonding Ii Molecular Geometry and Bonding Theories

Gases

Modern Materials

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

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Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

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Which statement concerning the vapor pressures of water and methanol (CH₃OH)is true?

Arrange the following in order of increasing boiling point: RbCl,CH₃Cl,CH₃OH,CH₄.

The triple point of iodine is at 0.12 atm and 115°C.Thus,liquid I₂

________ _ are the attractions that hold particles together in condensed phases.

The molar enthalpy of vaporization of hexane (C₆H₁₄)is 28.9 kJ/mol,and its normal boiling point is 68.73°C.What is the vapor pressure of hexane at 25°C? (R = 8.314 J/K • mol)

Palladium crystallizes in a face-centered cubic unit cell.Its density is 12.0 g/cm³ at 27°C.What is the atomic radius of Pd?