Question 1

Arrange aluminum, nitrogen, phosphorus, and indium in order of increasing electronegativity.

Accepted Answer

A)  Al < In < N < P 
B)  Al < In < P < N 
C)  In < Al < P < N 
D)  In < P < Al < N 
E)  None of the above orders is correct. 
A)  Al < In < N < P 
B)  Al < In < P < N 
C)  In < Al < P < N 
D)  In < P < Al < N 
E)  None of the above orders is correct.

Question 2

In which of these substances are the atoms held together by polar covalent bonding?

Accepted Answer

A)  SrCl2 
B)  CsCl 
C)  ClF 
D)  TiF2 
E)  S8 
A)  SrCl2 
B)  CsCl 
C)  ClF 
D)  TiF2 
E)  S8

Question 3

Arrange the following bonds in order of increasing bond strength.

Accepted Answer

A)  C-I < C-Br < C-Cl < C-F 
B)  C-F < C-Cl < C-Br < C-I 
C)  C-Br < C-I < C-Cl < C-F 
D)  C-I < C-Br < C-F< C-Cl 
E)  None of the above orders is correct. 
A)  C-I < C-Br < C-Cl < C-F 
B)  C-F < C-Cl < C-Br < C-I 
C)  C-Br < C-I < C-Cl < C-F 
D)  C-I < C-Br < C-F< C-Cl 
E)  None of the above orders is correct.

Question 4

In which of these substances are the atoms held together by metallic bonding?

Accepted Answer

A)  CO2 
B)  Si 
C)  Br2 
D)  S8 
E)  Cr 
A)  CO2 
B)  Si 
C)  Br2 
D)  S8 
E)  Cr

Question 5

Select the correct formula for a compound formed from barium and nitrogen.

Accepted Answer

A)  BaN 
B)  BaN2 
C)  Ba2N3 
D)  Ba2N 
E)  Ba3N2 
A)  BaN 
B)  BaN2 
C)  Ba2N3 
D)  Ba2N 
E)  Ba3N2

Question 6

Arrange calcium, rubidium, sulfur, and arsenic in order of decreasing electronegativity.

Accepted Answer

A)  S > As > Rb > Ca 
B)  S > As > Ca > Rb 
C)  As > S > Rb > Ca 
D)  As > S > Ca > Rb 
E)  None of the above orders is correct. 
A)  S > As > Rb > Ca 
B)  S > As > Ca > Rb 
C)  As > S > Rb > Ca 
D)  As > S > Ca > Rb 
E)  None of the above orders is correct.

Question 7

Using the bond energies provided below, calculate F1F1F1S1F1F1F10H° for the reaction CH4(g) + 4Cl2(g) F1F1F1S1F1F1F10 CCl4(g) + 4HCl(g)
Bond energies: C-H = 413 kJ/mol, Cl-Cl = 243 kJ/mol, C-Cl = 339 kJ/mol, H-Cl = 427 kJ/mol

Accepted Answer

A)  1422 kJ 
B)  440 kJ 
C)  110 kJ 
D)  -110 kJ 
E)  - 440 kJ 
A)  1422 kJ 
B)  440 kJ 
C)  110 kJ 
D)  -110 kJ 
E)  - 440 kJ

Question 8

The diameter of a chloride ion is 362 pm, and the diameter of a potassium ion is 276 pm. What is the distance between the nuclei of adjacent chloride and potassium ions in solid potassium chloride?

Accepted Answer

A)  1276 pm 
B)  638 pm 
C)  319 pm 
D)  181 pm 
E)  138 pm 
A)  1276 pm 
B)  638 pm 
C)  319 pm 
D)  181 pm 
E)  138 pm

Question 9

The lattice energy of rubidium chloride is the energy change accompanying the process
Rb+(g) + Cl-(g) F1F1F1S1F1F1F10 RbCl(s)
Calculate the lattice energy of RbCl using the following data:     Cl2(g) F1F1F1S1F1F1F10 RbCl(s)

Accepted Answer

Lattice en

Question 10

The majority of elements are good electrical conductors when in solid form.

Accepted Answer

A) True 
 B)False

Question 11

The lattice energy of CaF2 is the energy change for which one, if any, of the following processes?

Accepted Answer

A)  Ca2+(s) + 2F-(g) F1F1F1S1F1F1F10 CaF2(g) 
B)  CaF2(g) F1F1F1S1F1F1F10 CaF2(s) 
C)  Ca(g) + 2F(g) F1F1F1S1F1F1F10 CaF2(s) 
D)  CaF2(aq) F1F1F1S1F1F1F10 CaF2(s) 
E)  none of the above 
A)  Ca2+(s) + 2F-(g) F1F1F1S1F1F1F10 CaF2(g) 
B)  CaF2(g) F1F1F1S1F1F1F10 CaF2(s) 
C)  Ca(g) + 2F(g) F1F1F1S1F1F1F10 CaF2(s) 
D)  CaF2(aq) F1F1F1S1F1F1F10 CaF2(s) 
E)  none of the above

Question 12

Analysis of an unknown substance showed that it has a high boiling point and is brittle. It is an insulator as a solid but conducts electricity when melted. Which of the following substances would have those characteristics?

Accepted Answer

A)  HCl 
B)  Al 
C)  KBr 
D)  SiF4 
E)  I2 
A)  HCl 
B)  Al 
C)  KBr 
D)  SiF4 
E)  I2

Question 13

Which of the following is an ionic compound?

Accepted Answer

A)  H2S 
B)  NH3 
C)  I2 
D)  KI 
E)  CCl4 
A)  H2S 
B)  NH3 
C)  I2 
D)  KI 
E)  CCl4

Question 14

The electrostatic energy of two charged particles is inversely proportional to the square of the distance between them.

Accepted Answer

A) True 
 B)False

Question 15

Combustion of a fat will release more energy than combustion of an equal mass of carbohydrate because

Accepted Answer

A)  fats contain more bonds to oxygen than carbohydrates. 
B)  fats contain fewer bonds to oxygen than carbohydrates. 
C)  the total energy of the carbon-carbon and carbon-hydrogen bonds in fats is greater than the energy content of the carbon-oxygen and oxygen-hydrogen bonds in the reaction products (carbon dioxide and water). 
D)  the total energy of the carbon-carbon and carbon-hydrogen bonds in fats is greater than the energy content of the bonds in carbohydrates. 
E)  fats have higher molar masses than carbohydrates. 
A)  fats contain more bonds to oxygen than carbohydrates. 
B)  fats contain fewer bonds to oxygen than carbohydrates. 
C)  the total energy of the carbon-carbon and carbon-hydrogen bonds in fats is greater than the energy content of the carbon-oxygen and oxygen-hydrogen bonds in the reaction products (carbon dioxide and water). 
D)  the total energy of the carbon-carbon and carbon-hydrogen bonds in fats is greater than the energy content of the bonds in carbohydrates. 
E)  fats have higher molar masses than carbohydrates.

Question 16

Bond energy increases as bond order increases, for bonding between a given pair of atoms.

Accepted Answer

A) True 
 B)False

Question 17

For which of the following elements (in their normal, stable, forms) would it be correct to describe the bonding as involving "electron pooling"?

Accepted Answer

A)  hydrogen 
B)  helium 
C)  sulfur 
D)  iodine 
E)  aluminum 
A)  hydrogen 
B)  helium 
C)  sulfur 
D)  iodine 
E)  aluminum

Question 18

Covalently bonded substances do not necessarily exist as separate molecules.

Accepted Answer

A) True 
 B)False

Question 19

Select the element whose Lewis symbol is correct.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 20

Calculate the lattice energy of magnesium sulfide from the data given below.
 
A) -3406 kJ/mol
B) -2720. kJ/mol
C) 2720. kJ/mol
D)3406 kJ/mol
E)none of the above

Accepted Answer

The answer of Calculate the lattice energy of magnesium sulfide...

Exam 9: Models of Chemical Bonding

Arrange aluminum, nitrogen, phosphorus, and indium in order of increasing electronegativity.

In which of these substances are the atoms held together by polar covalent bonding?

Arrange the following bonds in order of increasing bond strength.

In which of these substances are the atoms held together by metallic bonding?

Select the correct formula for a compound formed from barium and nitrogen.

Arrange calcium, rubidium, sulfur, and arsenic in order of decreasing electronegativity.

Using the bond energies provided below, calculate H° for the reaction CH4(g) + 4Cl2(g)  CCl4(g) + 4HCl(g) Bond energies: C-H = 413 kJ/mol, Cl-Cl = 243 kJ/mol, C-Cl = 339 kJ/mol, H-Cl = 427 kJ/mol

The diameter of a chloride ion is 362 pm, and the diameter of a potassium ion is 276 pm. What is the distance between the nuclei of adjacent chloride and potassium ions in solid potassium chloride?

The lattice energy of rubidium chloride is the energy change accompanying the process Rb+(g) + Cl-(g)  RbCl(s) Calculate the lattice energy of RbCl using the following data: Cl2(g)  RbCl(s)

The majority of elements are good electrical conductors when in solid form.

The lattice energy of CaF2 is the energy change for which one, if any, of the following processes?

Analysis of an unknown substance showed that it has a high boiling point and is brittle. It is an insulator as a solid but conducts electricity when melted. Which of the following substances would have those characteristics?

Which of the following is an ionic compound?

The electrostatic energy of two charged particles is inversely proportional to the square of the distance between them.

Combustion of a fat will release more energy than combustion of an equal mass of carbohydrate because

Bond energy increases as bond order increases, for bonding between a given pair of atoms.

For which of the following elements (in their normal, stable, forms) would it be correct to describe the bonding as involving "electron pooling"?

Covalently bonded substances do not necessarily exist as separate molecules.

Select the element whose Lewis symbol is correct.

Calculate the lattice energy of magnesium sulfide from the data given below. A) -3406 kJ/mol B) -2720. kJ/mol C) 2720. kJ/mol D)3406 kJ/mol E)none of the above

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

The Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

Using the bond energies provided below, calculate H° for the reaction CH₄(g) + 4Cl₂(g)  CCl₄(g) + 4HCl(g) Bond energies: C-H = 413 kJ/mol, Cl-Cl = 243 kJ/mol, C-Cl = 339 kJ/mol, H-Cl = 427 kJ/mol

The lattice energy of rubidium chloride is the energy change accompanying the process Rb⁺(g) + Cl^-(g)  RbCl(s) Calculate the lattice energy of RbCl using the following data: Cl₂(g)  RbCl(s)

The lattice energy of CaF₂ is the energy change for which one, if any, of the following processes?