Question 1

Write a Lewis structure for OF2.

Accepted Answer

Question 2

The total number of bonding electrons in a molecule of formaldehyde (H2CO)is

Accepted Answer

A) 3 
B) 4 
C) 6 
D) 8 
E) 18 
A) 3 
B) 4 
C) 6 
D) 8 
E) 18

Question 3

Write a Lewis structure for the chlorate ion, ClO3-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO3- that obey the octet rule.

Accepted Answer

@#IMG-DLM& Total number of res

Question 4

Calculate the energy change for the reaction K(g)+ I(g)$\rarr$ K+(g)+ I - (g)
Given the following ionization energy (IE)and electron affinity (EA)values.

Accepted Answer

A) -124 kJ/mol 
B) -715 kJ/mol 
C) 715 kJ/mol 
D) 1429 kJ/mol 
E) None of these 
A) -124 kJ/mol 
B) -715 kJ/mol 
C) 715 kJ/mol 
D) 1429 kJ/mol 
E) None of these

Question 5

Which of the elements listed below is most likely to exhibit an expanded octet in its compounds?

Accepted Answer

A) O 
B) S 
C) Na 
D) C 
E) N 
A) O 
B) S 
C) Na 
D) C 
E) N

Question 6

The number of lone electron pairs in the CO32- ion is ___.

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 8 
A) 4 
B) 5 
C) 6 
D) 7 
E) 8

Question 7

The bond in F2 is described as polar covalent.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following ionic solids would have the largest lattice energy?

Accepted Answer

A) KF 
B) KI 
C) LiF 
D) LiI 
E) NaF 
A) KF 
B) KI 
C) LiF 
D) LiI 
E) NaF

Question 9

The bond in which one of the following pairs of atoms would be the most polar?

Accepted Answer

A) B - C 
B) C - N 
C) C - O 
D) Si - O 
E) C - C 
A) B - C 
B) C - N 
C) C - O 
D) Si - O 
E) C - C

Question 10

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol
BE(C=O in CO2)= 799 kJ/mol
BE(C-H)= 414 kJ/mol
BE(O-H)= 460 kJ/mol
BE(O=O)= 498.7 kJ/mol

Accepted Answer

A) 1360 kJ 
B) 2240 kJ 
C) 2370 kJ 
D) 1540 kJ 
E) 1970 kJ 
A) 1360 kJ 
B) 2240 kJ 
C) 2370 kJ 
D) 1540 kJ 
E) 1970 kJ

Question 11

Write the Lewis structure of boron trifluoride.

Accepted Answer

The answer of Write the Lewis structure of boron trifluoride....

Question 12

Write the Lewis dot symbol for the sulfide ion.

Accepted Answer

The answer of Write the Lewis dot symbol for the...

Question 13

For which of these species does the best Lewis structure have two or more equivalent resonance structures?

Accepted Answer

A) HCO2- 
B) SCN- 
C) CNO- 
D) N3- 
E) CO2 
A) HCO2- 
B) SCN- 
C) CNO- 
D) N3- 
E) CO2

Question 14

What is total number of lone pairs in the best Lewis structure for SOF4 that exceeds the octet rule (S is the central atom)?

Accepted Answer

A) 0 
B) 2 
C) 14 
D) 16 
E) 18 
A) 0 
B) 2 
C) 14 
D) 16 
E) 18

Question 15

The number of lone electron pairs in the N2 molecule is ___.

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 16

Which of the elements listed below has the greatest electronegativity?

Accepted Answer

A) Na 
B) As 
C) Ga 
D) Cs 
E) Sb 
A) Na 
B) As 
C) Ga 
D) Cs 
E) Sb

Question 17

Which of the elements listed below has the greatest electronegativity?

Accepted Answer

A) Se 
B) Sb 
C) K 
D) Ga 
E) Fe 
A) Se 
B) Sb 
C) K 
D) Ga 
E) Fe

Question 18

Classify the C - Cl bond in CCl4 as ionic, polar covalent, or nonpolar covalent.

Accepted Answer

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

Exam 9: Chemical Bonding I: Basic Concepts

Write a Lewis structure for OF2.

The total number of bonding electrons in a molecule of formaldehyde (H2CO)is

Write a Lewis structure for the chlorate ion, ClO3-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO3- that obey the octet rule.

Calculate the energy change for the reaction K(g)+ I(g) →\rarr→ K+(g)+ I - (g) Given the following ionization energy (IE)and electron affinity (EA)values.

Which of the elements listed below is most likely to exhibit an expanded octet in its compounds?

The number of lone electron pairs in the CO32- ion is ___.

The bond in F2 is described as polar covalent.

Which of the following ionic solids would have the largest lattice energy?

The bond in which one of the following pairs of atoms would be the most polar?

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C3H8, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol BE(C=O in CO2)= 799 kJ/mol BE(C-H)= 414 kJ/mol BE(O-H)= 460 kJ/mol BE(O=O)= 498.7 kJ/mol

Write the Lewis structure of boron trifluoride.

Write the Lewis dot symbol for the sulfide ion.

For which of these species does the best Lewis structure have two or more equivalent resonance structures?

What is total number of lone pairs in the best Lewis structure for SOF4 that exceeds the octet rule (S is the central atom)?

The number of lone electron pairs in the N2 molecule is ___.

Which of the elements listed below has the greatest electronegativity?

Which of the elements listed below has the greatest electronegativity?

Classify the C - Cl bond in CCl4 as ionic, polar covalent, or nonpolar covalent.

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Write a Lewis structure for OF₂.

The total number of bonding electrons in a molecule of formaldehyde (H₂CO)is

Write a Lewis structure for the chlorate ion, ClO₃^-, that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for ClO₃^- that obey the octet rule.

The number of lone electron pairs in the CO₃^2- ion is ___.

The bond in F₂ is described as polar covalent.

Use the bond enthalpy data given to estimate the heat released when 50.0 g of propane gas, C₃H₈, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C. BE(C-C)= 347 kJ/mol BE(C=O in CO₂)= 799 kJ/mol BE(C-H)= 414 kJ/mol BE(O-H)= 460 kJ/mol BE(O=O)= 498.7 kJ/mol

What is total number of lone pairs in the best Lewis structure for SOF₄ that exceeds the octet rule (S is the central atom)?

The number of lone electron pairs in the N₂ molecule is ___.

Classify the C - Cl bond in CCl₄ as ionic, polar covalent, or nonpolar covalent.