Question 1

What are the coordination numbers of calcium and titanium,respectively,in perovskite? The unit cell is shown below.

Accepted Answer

A) 6 and 6 
B) 12 and 6 
C) 12 and 8 
D) 12 and 12 
E) 6 and 8 
A) 6 and 6 
B) 12 and 6 
C) 12 and 8 
D) 12 and 12 
E) 6 and 8

Question 2

Which answer best accounts for the Na+ ions present in the NaCl unit cell?

Accepted Answer

A) 1 center atom + 1/8 F1F1F1S1F1F1F10 24 corner atoms 
B) 1 center atom + 1/2 F1F1F1S1F1F1F10 6 face atoms 
C) 1 center atom + 1/8 F1F1F1S1F1F1F10 8 corner atoms 
D) 1 center atom + 1/4 F1F1F1S1F1F1F10 12 edge atoms 
E) 1/8 F1F1F1S1F1F1F10 8 corner atoms + 1/2 F1F1F1S1F1F1F10 6 face atoms 
A) 1 center atom + 1/8 F1F1F1S1F1F1F10 24 corner atoms 
B) 1 center atom + 1/2 F1F1F1S1F1F1F10 6 face atoms 
C) 1 center atom + 1/8 F1F1F1S1F1F1F10 8 corner atoms 
D) 1 center atom + 1/4 F1F1F1S1F1F1F10 12 edge atoms 
E) 1/8 F1F1F1S1F1F1F10 8 corner atoms + 1/2 F1F1F1S1F1F1F10 6 face atoms

Question 3

Which of the following can form intermolecular hydrogen bonds?

Accepted Answer

A) PH3  
B) HI 
C) CH3CH2CH2CH2CH3  
D) HCOOH 
E) CH3CH2OCH2CH3  
A) PH3  
B) HI 
C) CH3CH2CH2CH2CH3  
D) HCOOH 
E) CH3CH2OCH2CH3

Question 4

The density of solid krypton is 2.16 gF1F1F1S1F1F1F10cmF1F1F1S1F1F1F103.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

Accepted Answer

A) 66.5 pm 
B) 225 pm 
C) 113 pm 
D) 318 pm 
E) 450 pm 
A) 66.5 pm 
B) 225 pm 
C) 113 pm 
D) 318 pm 
E) 450 pm

Question 5

All the following hydrated compounds are commonly available except

Accepted Answer

A) BaCl2·2H2O. 
B) NH4NO3·2H2O. 
C) NaClO4·H2O. 
D) Cr(ClO4)3·6H2O. 
E) La2(SO4)3·9H2O. 
A) BaCl2·2H2O. 
B) NH4NO3·2H2O. 
C) NaClO4·H2O. 
D) Cr(ClO4)3·6H2O. 
E) La2(SO4)3·9H2O.

Question 6

Which of the following cations is likely to be hydrated in compounds?

Accepted Answer

A) Cs+  
B) NH4+ 
C) La3+  
D) Rb+  
E) K+  
A) Cs+  
B) NH4+ 
C) La3+  
D) Rb+  
E) K+

Question 7

What is the coordination number of rubidium in RbF? The ionic radii of Rb+ and FF1F1F1S1F1F1F10 are 149 and 133 pm,respectively.

Accepted Answer

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

Question 8

What is the coordination number of magnesium in MgO? The ionic radii of Mg2+ and O2F1F1F1S1F1F1F10 are 72 and 140 pm,respectively.

Accepted Answer

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

Question 9

Predict which of the following liquids has the lowest enthalpy of vaporization.

Accepted Answer

A) H2Se 
B) H2O 
C) H2Po 
D) H2S 
E) H2Te 
A) H2Se 
B) H2O 
C) H2Po 
D) H2S 
E) H2Te

Question 10

The mass of a face-centered cubic unit cell is

Accepted Answer

A) Two times the mass of one atom. 
B) Five times the mass of one atom. 
C) Equal to the mass of one atom. 
D) Six times the mass of one atom. 
E) Four times the mass of one atom. 
A) Two times the mass of one atom. 
B) Five times the mass of one atom. 
C) Equal to the mass of one atom. 
D) Six times the mass of one atom. 
E) Four times the mass of one atom.

Question 11

How many octahedral holes are there in a face-centered cubic unit cell?

Accepted Answer

A) 6 
B) 13 
C) 12 
D) 4 
E) 8 
A) 6 
B) 13 
C) 12 
D) 4 
E) 8

Question 12

Tetrabromomethane has a higher boiling point than tetrachloromethane.True or false?

Accepted Answer

A) True 
 B)False

Question 13

If the interaction between two species is proportional to 1/r6,which of the following is likely involved?

Accepted Answer

A) Chloromethane molecules in the gas phase 
B) Chloromethane molecules in the solid phase 
C) Li+ and H2O 
D) Na+ and H2O 
E) Ions in an ionic solid 
A) Chloromethane molecules in the gas phase 
B) Chloromethane molecules in the solid phase 
C) Li+ and H2O 
D) Na+ and H2O 
E) Ions in an ionic solid

Question 14

If the radius of an atom is r,what is the length of the side of the body-centered cubic unit cell?

Accepted Answer

A) 4r/3½ 
B) 2.25r 
C) r 
D) 2r 
E) 8½r 
A) 4r/3½ 
B) 2.25r 
C) r 
D) 2r 
E) 8½r

What are the coordination numbers of calcium and titanium,respectively,in perovskite? The unit cell is shown below.

Which answer best accounts for the Na⁺ ions present in the NaCl unit cell?

Which of the following can form intermolecular hydrogen bonds?

The density of solid krypton is 2.16 gcm^³.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

All the following hydrated compounds are commonly available except

Which of the following cations is likely to be hydrated in compounds?

What is the coordination number of rubidium in RbF? The ionic radii of Rb⁺ and F^ are 149 and 133 pm,respectively.

What is the coordination number of magnesium in MgO? The ionic radii of Mg²⁺ and O²^ are 72 and 140 pm,respectively.

Predict which of the following liquids has the lowest enthalpy of vaporization.

The mass of a face-centered cubic unit cell is

How many octahedral holes are there in a face-centered cubic unit cell?

Tetrabromomethane has a higher boiling point than tetrachloromethane.True or false?

If the interaction between two species is proportional to 1/r⁶,which of the following is likely involved?

If the radius of an atom is r,what is the length of the side of the body-centered cubic unit cell?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Inorganic Materials

Thermodynamics: the First Law

Thermodynamics: the Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: the D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Exam 6: Liquids and Solids

What are the coordination numbers of calcium and titanium,respectively,in perovskite? The unit cell is shown below.

Which answer best accounts for the Na+ ions present in the NaCl unit cell?

Which of the following can form intermolecular hydrogen bonds?

The density of solid krypton is 2.16 gcm3.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

All the following hydrated compounds are commonly available except

Which of the following cations is likely to be hydrated in compounds?

What is the coordination number of rubidium in RbF? The ionic radii of Rb+ and F are 149 and 133 pm,respectively.

What is the coordination number of magnesium in MgO? The ionic radii of Mg2+ and O2 are 72 and 140 pm,respectively.

Predict which of the following liquids has the lowest enthalpy of vaporization.

The mass of a face-centered cubic unit cell is

How many octahedral holes are there in a face-centered cubic unit cell?

Tetrabromomethane has a higher boiling point than tetrachloromethane.True or false?

If the interaction between two species is proportional to 1/r6,which of the following is likely involved?

If the radius of an atom is r,what is the length of the side of the body-centered cubic unit cell?

The Quantum World

Quantum Mechanics in Action: Atoms

Chemical Bonds

Molecular Shape and Structure

The Properties of Gases

Inorganic Materials

Thermodynamics: the First Law

Thermodynamics: the Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: the D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

Which answer best accounts for the Na⁺ ions present in the NaCl unit cell?

The density of solid krypton is 2.16 gcm^³.Krypton crystallizes in a cubic close-packed structure; estimate the atomic radius.

What is the coordination number of rubidium in RbF? The ionic radii of Rb⁺ and F^ are 149 and 133 pm,respectively.

What is the coordination number of magnesium in MgO? The ionic radii of Mg²⁺ and O²^ are 72 and 140 pm,respectively.

If the interaction between two species is proportional to 1/r⁶,which of the following is likely involved?