Question 1

How many Cl- ions are around each K+ ion in KCl,which has a cubic unit cell with Cl- ions on each corner and each face?

Accepted Answer

A) 1 
B) 4 
C) 6 
D) 8 
A) 1 
B) 4 
C) 6 
D) 8

Question 2

The property of a liquid that measure the liquid's resistance to flow is

Accepted Answer

A) boiling point. 
B) heat of vaporization. 
C) surface tension. 
D) viscosity. 
A) boiling point. 
B) heat of vaporization. 
C) surface tension. 
D) viscosity.

Question 3

What phases can be present at 200°C and 0.75 atm pressure?

Accepted Answer

A) only the vapor phase 
B) only the liquid phase 
C) only the solid phase 
D) both the solid and vapor phases 
A) only the vapor phase 
B) only the liquid phase 
C) only the solid phase 
D) both the solid and vapor phases

Question 4

O2 and O3 are ________ of oxygen.

Accepted Answer

A) allotropes 
B) isomers 
C) isotopes 
D) stereomers 
A) allotropes 
B) isomers 
C) isotopes 
D) stereomers

Question 5

Melting occurs along the

Accepted Answer

A) AC line. 
B) CB line. 
C) CD line. 
D) All of these 
A) AC line. 
B) CB line. 
C) CD line. 
D) All of these

Question 6

Which drawing best represents hydrogen bonding in methylamine,CH3NH2?

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 7

The plots below represent vapor pressure vs.temperature curves for diethyl ether,ethanol,mercury,and water,not necessarily in that order.  
-Based on the relative strengths of the intermolecular forces of attraction of each substance,which is the most likely vapor pressure vs.temperature curve for ethanol?

Accepted Answer

A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d) 
A) curve (a) 
B) curve (b) 
C) curve (c) 
D) curve (d)

Question 8

The vapor pressure of a pure liquid increases as the

Accepted Answer

A) average kinetic energy of the molecules in the liquid phase decreases. 
B) intermolecular attractive forces increase. 
C) temperature of the liquid phase decreases. 
D) temperature of the liquid phase increases. 
A) average kinetic energy of the molecules in the liquid phase decreases. 
B) intermolecular attractive forces increase. 
C) temperature of the liquid phase decreases. 
D) temperature of the liquid phase increases.

Question 9

Which substance in each of the following pairs is expected to have the larger dispersion forces?

Accepted Answer

A) Br2 in set I and n-butane in set II 
B) Br2 in set I and isobutane in set II 
C) I2 in set I and n-butane in set II 
D) I2 in set I and isobutane in set II 
A) Br2 in set I and n-butane in set II 
B) Br2 in set I and isobutane in set II 
C) I2 in set I and n-butane in set II 
D) I2 in set I and isobutane in set II

Question 10

When a liquid is heated at its boiling point,the

Accepted Answer

A) covalent bonds are broken,allowing vaporization to occur. 
B) temperature of the liquid increases. 
C) temperature of the liquid remains the same as long as any liquid is present. 
D) temperature of the vapor phase increases. 
A) covalent bonds are broken,allowing vaporization to occur. 
B) temperature of the liquid increases. 
C) temperature of the liquid remains the same as long as any liquid is present. 
D) temperature of the vapor phase increases.

Question 11

Identify the packing in the figure shown below.

Accepted Answer

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

Question 12

The highest coordination number for spherical packing is found in the

Accepted Answer

A) body-centered cubic structure. 
B) simple cubic structure. 
C) body-centered cubic and face-centered cubic. 
D) cubic closest-packing and hexagonal closest packing. 
A) body-centered cubic structure. 
B) simple cubic structure. 
C) body-centered cubic and face-centered cubic. 
D) cubic closest-packing and hexagonal closest packing.

Question 13

Which of the following should have the largest dipole moment?

Accepted Answer

A) H2(g) 
B) CO2(g) 
C) KCl(g) 
D) CH3F(g) 
A) H2(g) 
B) CO2(g) 
C) KCl(g) 
D) CH3F(g)

Question 14

Of C2H5OH and C3H5(OH)3 the one expected to have the higher vapor pressure is ________,and the one expected to have the higher boiling point is ________.

Accepted Answer

Question 15

Bromine is one of only two elements that is a liquid at room temperature.Bromine has a heat of vaporization of 30.91 kJ/mol and its boiling point is 59°C.What is the entropy of vaporization for bromine?

Accepted Answer

A) -301 J/(mol ∙ K) 
B) -93.1 J/(mol ∙ K) 
C) 10.7 J/(mol ∙ K) 
D) 93.1 J/(mol ∙ K) 
A) -301 J/(mol ∙ K) 
B) -93.1 J/(mol ∙ K) 
C) 10.7 J/(mol ∙ K) 
D) 93.1 J/(mol ∙ K)

Question 16

Hydroquinone is an antioxidant that is also used as a photographic reducer and developer.The normal boiling point of hydroquinone is 310°C.Calculate the pressure at which hydroquinone will boil at 200°C given that its ΔHvap is 73.38 kJ/mol.

Accepted Answer

A) 1)210 × 10-4 mm Hg 
B) 1)35 mm Hg 
C) 22.5 mm Hg 
D) 757 mm Hg 
A) 1)210 × 10-4 mm Hg 
B) 1)35 mm Hg 
C) 22.5 mm Hg 
D) 757 mm Hg

Question 17

Which of the following compounds has the highest boiling point?

Accepted Answer

A) CH3CH2OH 
B) HOCH2CH2OH 
C) H3C-O-CH3 
D) CH3CH2CH2CH3 
A) CH3CH2OH 
B) HOCH2CH2OH 
C) H3C-O-CH3 
D) CH3CH2CH2CH3

Question 18

The solids formed by K,K2O2,SiO2,and O2 are classified as ________,________,________,and ________,respectively.

Accepted Answer

metallic,i

Question 19

Which of the following compounds has the highest boiling point?

Accepted Answer

A) H2O 
B) H Cl 
C) H2S  
D) N H3 
A) H2O 
B) H Cl 
C) H2S  
D) N H3

Question 20

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X-,and half of the tetrahedral holes filled with metal ions,Mn+ The empirical formula of this ionic compound is

Accepted Answer

A) MX. 
B) MX2. 
C) M2X. 
D) M2X7. 
A) MX. 
B) MX2. 
C) M2X. 
D) M2X7.

Exam 10: Liquids,solids,and Phase Changes

How many Cl- ions are around each K+ ion in KCl,which has a cubic unit cell with Cl- ions on each corner and each face?

The property of a liquid that measure the liquid's resistance to flow is

What phases can be present at 200°C and 0.75 atm pressure?

O2 and O3 are ________ of oxygen.

Melting occurs along the

Which drawing best represents hydrogen bonding in methylamine,CH3NH2?

The vapor pressure of a pure liquid increases as the

Which substance in each of the following pairs is expected to have the larger dispersion forces?

When a liquid is heated at its boiling point,the

Identify the packing in the figure shown below.

The highest coordination number for spherical packing is found in the

Which of the following should have the largest dipole moment?

Of C2H5OH and C3H5(OH)3 the one expected to have the higher vapor pressure is ________,and the one expected to have the higher boiling point is ________.

Bromine is one of only two elements that is a liquid at room temperature.Bromine has a heat of vaporization of 30.91 kJ/mol and its boiling point is 59°C.What is the entropy of vaporization for bromine?

Hydroquinone is an antioxidant that is also used as a photographic reducer and developer.The normal boiling point of hydroquinone is 310°C.Calculate the pressure at which hydroquinone will boil at 200°C given that its ΔHvap is 73.38 kJ/mol.

Which of the following compounds has the highest boiling point?

The solids formed by K,K2O2,SiO2,and O2 are classified as ________,________,________,and ________,respectively.

Which of the following compounds has the highest boiling point?

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X-,and half of the tetrahedral holes filled with metal ions,Mn+ The empirical formula of this ionic compound is

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

How many Cl^- ions are around each K⁺ ion in KCl,which has a cubic unit cell with Cl^- ions on each corner and each face?

O₂ and O₃ are ________ of oxygen.

Which drawing best represents hydrogen bonding in methylamine,CH₃NH₂?

Of C₂H₅OH and C₃H₅(OH)₃ the one expected to have the higher vapor pressure is ,and the one expected to have the higher boiling point is .

Hydroquinone is an antioxidant that is also used as a photographic reducer and developer.The normal boiling point of hydroquinone is 310°C.Calculate the pressure at which hydroquinone will boil at 200°C given that its ΔH_vap is 73.38 kJ/mol.

The solids formed by K,K₂O₂,SiO₂,and O₂ are classified as ,,,and ,respectively.

An ionic compound crystallizes in a unit cell having a face-centered cubic array of anions,X^-,and half of the tetrahedral holes filled with metal ions,Mⁿ⁺ The empirical formula of this ionic compound is