Question 1

Which covalent bond is the most polar?

Accepted Answer

A) N- F 
B) C- F 
C) Cl- F 
D) F- F 
A) N- F 
B) C- F 
C) Cl- F 
D) F- F

Question 2

Rhodium has a face-centered cubic structure and has a density of 12.4 g/cm3.What is its atomic radius?

Accepted Answer

A) 134 pm 
B) 268 pm 
C) 380 pm 
D) 1070 pm 
A) 134 pm 
B) 268 pm 
C) 380 pm 
D) 1070 pm

Question 3

Which of the following molecules does not have a dipole moment?

Accepted Answer

A) CH2=CH2 
B) NH3 
C) CH3NH2 
D) HCl 
A) CH2=CH2 
B) NH3 
C) CH3NH2 
D) HCl

Question 4

The normal boiling point occurs when the

Accepted Answer

A) intermolecular forces within the liquid phase are broken. 
B) temperature of the pure liquid equals the external temperature. 
C) vapor pressure of a pure liquid equals an external pressure of one atmosphere. 
D) vapor pressure of the liquid equals the external pressure. 
A) intermolecular forces within the liquid phase are broken. 
B) temperature of the pure liquid equals the external temperature. 
C) vapor pressure of a pure liquid equals an external pressure of one atmosphere. 
D) vapor pressure of the liquid equals the external pressure.

Question 5

When cubic unit cells stack together,how many unit cells share a common corner?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
A) 2 
B) 4 
C) 6 
D) 8

Question 6

From the plot of vapor pressure as a function of temperature shown below,the normal boiling point for tert-butyl alcohol is approximately

Accepted Answer

A) 0°C. 
B) 40°C. 
C) 85°C. 
D) 100°C. 
A) 0°C. 
B) 40°C. 
C) 85°C. 
D) 100°C.

Question 7

Which is expected to have the largest dispersion forces?

Accepted Answer

A) C2H6 
B) C8H18 
C) N2 
D) CO2 
A) C2H6 
B) C8H18 
C) N2 
D) CO2

Question 8

The temperature and pressure at which all three phases can coexist in equilibrium is

Accepted Answer

A) 0)25 atm and 110°C. 
B) 1)0 atm and 140°C. 
C) 1)25 atm and 300°C. 
D) 0)45 atm and 130°C. 
A) 0)25 atm and 110°C. 
B) 1)0 atm and 140°C. 
C) 1)25 atm and 300°C. 
D) 0)45 atm and 130°C.

Question 9

First-order diffraction of X-rays with d = 154.2 pm at an angle of 32.5° is caused by layers of atoms in a crystalline solid with a spacing of ________ pm.

Accepted Answer

The answer of First-order diffraction of X-rays with d =...

Question 10

What phase changes occur when the pressure is held constant at 0.25 atm and the temperature increases from 100°C to 300°C?

Accepted Answer

A) liquid → gas 
B) solid → gas 
C) solid → liquid 
D) solid → liquid → gas 
A) liquid → gas 
B) solid → gas 
C) solid → liquid 
D) solid → liquid → gas

Question 11

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 128 pm?

Accepted Answer

A) 181 pm 
B) 362 pm 
C) 512 pm 
D) 1020 pm 
A) 181 pm 
B) 362 pm 
C) 512 pm 
D) 1020 pm

Question 12

The solid and liquid phases can exist in equilibrium along line

Accepted Answer

A) AC. 
B) CB. 
C) CD. 
D) BD. 
A) AC. 
B) CB. 
C) CD. 
D) BD.

Question 13

Lithium crystallizes in a body-centered cubic structure.What is the coordination number of each atom?

Accepted Answer

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

Question 14

Which of the following compounds has the highest boiling point?

Accepted Answer

A) H2O 
B) HCl 
C) H2S 
D) NH3 
A) H2O 
B) HCl 
C) H2S 
D) NH3

Question 15

Which of the following compounds forms a covalent network solid?

Accepted Answer

A) C8H18 
B) NO2 
C) SiO2 
D) SnCl4 
A) C8H18 
B) NO2 
C) SiO2 
D) SnCl4

Question 16

-If figure (1)represents the vapor pressure of water at 25°C,which figure represents the vapor pressure of ethanol,CH3CH2OH at 25°C?

Accepted Answer

A) figure (2) 
B) figure (3) 
C) figure (4) 
A) figure (2) 
B) figure (3) 
C) figure (4)

Question 17

The bonds in the polyatomic ion CO32- are classified as

Accepted Answer

A) ionic 
B) metallic 
C) nonpolar covalent 
D) polar covalent 
A) ionic 
B) metallic 
C) nonpolar covalent 
D) polar covalent

Question 18

Which drawing best accounts for the polarity of water,H2O,and the bond polarities that make a major contribution to the overall molecular polarity?

Accepted Answer

A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4) 
A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4)

Question 19

Which type of spherical packing has the most unused space?

Accepted Answer

A) body-centered cubic 
B) cubic closest-packed 
C) cubic closest-packed and hexagonal closest-packed 
D) simple cubic 
A) body-centered cubic 
B) cubic closest-packed 
C) cubic closest-packed and hexagonal closest-packed 
D) simple cubic

Question 20

The normal boiling point for HBr is higher than the normal boiling point for HCl.This can be explained by

Accepted Answer

A) larger dipole-dipole forces for HBr. 
B) larger dispersion forces for HBr. 
C) larger hydrogen-bond forces for HBr. 
D) larger dipole-dipole forces,larger dispersion forces,and larger hydrogen-bond forces for HBr. 
A) larger dipole-dipole forces for HBr. 
B) larger dispersion forces for HBr. 
C) larger hydrogen-bond forces for HBr. 
D) larger dipole-dipole forces,larger dispersion forces,and larger hydrogen-bond forces for HBr.

Exam 10: Liquids,solids,and Phase Changes

Which covalent bond is the most polar?

Rhodium has a face-centered cubic structure and has a density of 12.4 g/cm3.What is its atomic radius?

Which of the following molecules does not have a dipole moment?

The normal boiling point occurs when the

When cubic unit cells stack together,how many unit cells share a common corner?

From the plot of vapor pressure as a function of temperature shown below,the normal boiling point for tert-butyl alcohol is approximately

Which is expected to have the largest dispersion forces?

The temperature and pressure at which all three phases can coexist in equilibrium is

First-order diffraction of X-rays with d = 154.2 pm at an angle of 32.5° is caused by layers of atoms in a crystalline solid with a spacing of ________ pm.

What phase changes occur when the pressure is held constant at 0.25 atm and the temperature increases from 100°C to 300°C?

What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 128 pm?

The solid and liquid phases can exist in equilibrium along line

Lithium crystallizes in a body-centered cubic structure.What is the coordination number of each atom?

Which of the following compounds has the highest boiling point?

Which of the following compounds forms a covalent network solid?

-If figure (1)represents the vapor pressure of water at 25°C,which figure represents the vapor pressure of ethanol,CH3CH2OH at 25°C?

The bonds in the polyatomic ion CO32- are classified as

Which drawing best accounts for the polarity of water,H2O,and the bond polarities that make a major contribution to the overall molecular polarity?

Which type of spherical packing has the most unused space?

The normal boiling point for HBr is higher than the normal boiling point for HCl.This can be explained by

Chemistry: Matter and Measurement

Atoms, molecules, and Ions

Formulas, equations, and Moles

Reactions in Aqueous Solutions

Periodicity and the Atomic Structure of Atoms

Ionic Bonds and Some Main-Group Chemistry

Covalent Bonds and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Hydrogen, oxygen, and Water

The Main-Group Elements

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

Nuclear Chemistry

Organic and Biological Chemistry

Filters

Rhodium has a face-centered cubic structure and has a density of 12.4 g/cm³.What is its atomic radius?

-If figure (1)represents the vapor pressure of water at 25°C,which figure represents the vapor pressure of ethanol,CH₃CH₂OH at 25°C?

The bonds in the polyatomic ion CO₃^2- are classified as

Which drawing best accounts for the polarity of water,H₂O,and the bond polarities that make a major contribution to the overall molecular polarity?