Question 1

Write a Lewis structure for OF2.

Accepted Answer

Question 2

The total number of valence electrons in the molecule CO2 is

Accepted Answer

A) 4 
B) 10 
C) 14 
D) 16 
E) 20 
A) 4 
B) 10 
C) 14 
D) 16 
E) 20

Question 3

What is the formal charge on sulfur in the most favorable Lewis structure for the SCN- (thiocyanate)ion based on minimizing formal charge overall?

Accepted Answer

A) -2 
B) -1 
C) 0 
D) +1 
E) +2 
A) -2 
B) -1 
C) 0 
D) +1 
E) +2

Question 4

Which one of the following is most likely to be a covalent compound?

Accepted Answer

A) CsOH 
B) NF3 
C) Sr(NO3)2 
D) CaO 
E) LiF 
A) CsOH 
B) NF3 
C) Sr(NO3)2 
D) CaO 
E) LiF

Question 5

Which one of the following is most likely to be an ionic compound?

Accepted Answer

A) CaCl2 
B) CO2 
C) CS2 
D) SO2 
E) OF2 
A) CaCl2 
B) CO2 
C) CS2 
D) SO2 
E) OF2

Question 6

Which one of the following compounds utilizes both ionic and covalent bonding?

Accepted Answer

A) C10H22O 
B) NH3 
C) Na2S 
D) NH4NO3 
E) K3N 
A) C10H22O 
B) NH3 
C) Na2S 
D) NH4NO3 
E) K3N

Question 7

The Lewis structure for CS2 is:

Accepted Answer

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

Question 8

Which molecule has a Lewis structure that does not obey the octet rule?

Accepted Answer

A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2 
A) N2O 
B) CS2 
C) PH3 
D) CCl4 
E) NO2

Question 9

What type of bonding is present in the ion O22- (ionic, covalent, or both)?

Accepted Answer

Question 10

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Accepted Answer

The answer of Write the chemical equation for which the...

Question 11

Arrange the elements Ba, Br, and Ga in order of increasing electronegativity

Accepted Answer

A) Ba < Br < Ga 
B) Br < Ga < Ba 
C) Ba < Ga < Br 
D) Ga < Ba < Br 
E) Ga < Br < Ba 
A) Ba < Br < Ga 
B) Br < Ga < Ba 
C) Ba < Ga < Br 
D) Ga < Ba < Br 
E) Ga < Br < Ba

Question 12

Write the Lewis structure of boron trifluoride.

Accepted Answer

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

Question 13

Which one of the following molecules has an atom with an incomplete octet?

Accepted Answer

A) NF3 
B) H2O 
C) AsCl3 
D) GeH4 
E) BF3 
A) NF3 
B) H2O 
C) AsCl3 
D) GeH4 
E) BF3

Question 14

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)?

Accepted Answer

A) Al - I 
B) Si - I 
C) Al - Cl 
D) Si - Cl 
E) Si - P 
A) Al - I 
B) Si - I 
C) Al - Cl 
D) Si - Cl 
E) Si - P

Question 15

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

Accepted Answer

A) +2 
B) +1 
C) 0 
D) -1 
E) -2 
A) +2 
B) +1 
C) 0 
D) -1 
E) -2

Question 16

The Lewis structure reveals a triple bond in which of the following molecules?

Accepted Answer

A) Br2 
B) O2 
C) N2 
D) H2 
E) CH4 
A) Br2 
B) O2 
C) N2 
D) H2 
E) CH4

Question 17

Use the Born-Haber cycle to calculate the lattice energy of KCl(s)given the following data: $\Delta$H(sublimation)K = 79.2 kJ/mol
I1 (K)= 418.7 kJ/mol
Bond energy (Cl-Cl)= 242.8 kJ/mol
EA (Cl)= 348 kJ/mol
$\Delta$H f  (KCl(s))= -435.7 kJ/mol

Accepted Answer

A) -165 kJ/mol 
B) 288 kJ/mol 
C) 629 kJ/mol 
D) 707 kJ/mol 
E) 828 kJ/mol 
A) -165 kJ/mol 
B) 288 kJ/mol 
C) 629 kJ/mol 
D) 707 kJ/mol 
E) 828 kJ/mol

Question 18

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

Accepted Answer

A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4) 
A) (2)and (4) 
B) (2)and (3) 
C) (1)and (2) 
D) (3)and (4) 
E) (1)and (4)

Question 19

List all types of bonding present in the molecule S8  I.ionic bond
II.polar covalent bond
III.nonpolar covalent bond

Accepted Answer

A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III 
A) I only 
B) II only 
C) III only 
D) I and II 
E) II and III

Question 20

Calculate the energy required for the gas phase process represented by
Na(g)+ Br(g) $\rarr$Na+(g)+ Br - (g) 
Given:	
Ionization energy (Na) = 496 kJ/mol
Electron affinity (Br)    = 324 kJ/mol
Electron affinity (Na)   = 53 kJ/mol

Accepted Answer

Exam 9: Chemical Bonding I: Basic Concepts

Write a Lewis structure for OF2.

The total number of valence electrons in the molecule CO2 is

What is the formal charge on sulfur in the most favorable Lewis structure for the SCN- (thiocyanate)ion based on minimizing formal charge overall?

Which one of the following is most likely to be a covalent compound?

Which one of the following is most likely to be an ionic compound?

Which one of the following compounds utilizes both ionic and covalent bonding?

The Lewis structure for CS2 is:

Which molecule has a Lewis structure that does not obey the octet rule?

What type of bonding is present in the ion O22- (ionic, covalent, or both)?

Write the chemical equation for which the enthalpy of reaction is the lattice energy of KCl(s).

Arrange the elements Ba, Br, and Ga in order of increasing electronegativity

Write the Lewis structure of boron trifluoride.

Which one of the following molecules has an atom with an incomplete octet?

Which of the following covalent bonds is the most polar (i.e., highest percent ionic character)?

In the Lewis structure of the iodate ion, IO3-, that satisfies the octet rule, the formal charge on the central iodine atom is

The Lewis structure reveals a triple bond in which of the following molecules?

Use the Born-Haber cycle to calculate the lattice energy of KCl(s)given the following data: Δ\DeltaΔ H(sublimation)K = 79.2 kJ/mol I1 (K)= 418.7 kJ/mol Bond energy (Cl-Cl)= 242.8 kJ/mol EA (Cl)= 348 kJ/mol Δ\DeltaΔ H f (KCl(s))= -435.7 kJ/mol

Which response includes all the molecules below that do not follow the octet rule? (1)H2S (2)BCl3 (3)PH3 (4)SF4

List all types of bonding present in the molecule S8 I.ionic bond II.polar covalent bond III.nonpolar covalent bond

Calculate the energy required for the gas phase process represented by Na(g)+ Br(g) →\rarr→ Na+(g)+ Br - (g) Given: Ionization energy (Na) = 496 kJ/mol Electron affinity (Br) = 324 kJ/mol Electron affinity (Na) = 53 kJ/mol

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Write a Lewis structure for OF₂.

The total number of valence electrons in the molecule CO₂ is

What is the formal charge on sulfur in the most favorable Lewis structure for the SCN^- (thiocyanate)ion based on minimizing formal charge overall?

The Lewis structure for CS₂ is:

What type of bonding is present in the ion O₂^2- (ionic, covalent, or both)?

In the Lewis structure of the iodate ion, IO₃^-, that satisfies the octet rule, the formal charge on the central iodine atom is

Use the Born-Haber cycle to calculate the lattice energy of KCl(s)given the following data: $\Delta$ H(sublimation)K = 79.2 kJ/mol I₁ (K)= 418.7 kJ/mol Bond energy (Cl-Cl)= 242.8 kJ/mol EA (Cl)= 348 kJ/mol $\Delta$ H^f(KCl(s))= -435.7 kJ/mol

Which response includes all the molecules below that do not follow the octet rule? (1)H₂S (2)BCl₃ (3)PH₃ (4)SF₄

List all types of bonding present in the molecule S₈ I.ionic bond II.polar covalent bond III.nonpolar covalent bond

Calculate the energy required for the gas phase process represented by Na(g)+ Br(g) $\rarr$ Na⁺(g)+ Br^-(g) Given: Ionization energy (Na) = 496 kJ/mol Electron affinity (Br) = 324 kJ/mol Electron affinity (Na) = 53 kJ/mol