Question 1

Write a Lewis structure for the nitrate ion, NO3-, showing all non-zero formal charges.

Accepted Answer

Question 2

What type of chemical bond holds the atoms together within a water molecule?

Accepted Answer

A)  Ionic bond
B)  Nonpolar covalent bond
C)  Polar covalent bond
D)  Coordinate covalent bondE) A) and B)
F) A) and C)

Question 3

The total number of lone pairs in NCl3 is

Accepted Answer

A)  6
B)  8
C)  9
D)  10
E)  13F) None of the above
G) D) and E)

Question 4

Which of the following solids would have the highest melting point?

Accepted Answer

A)  NaI
B)  NaF
C)  MgO
D)  MgCl2
E)  KFF) A) and E)
G) D) and E)

Question 5

The Lewis dot symbol for the S 2- ion is

Accepted Answer

A)   ( 2- ion is 
A)   ( )  
B)   (  2-)  
C)  (S2-)  
D)  (     2-)  
E)   (  ) " class="answers-bank-image d-inline" rel="preload" >) 
B)   ( 2- ion is 
A)   ( )  
B)   (  2-)  
C)  (S2-)  
D)  (     2-)  
E)   (  ) " class="answers-bank-image d-inline" rel="preload" > 2-) 
C)  (S2-) 
D)  (  2- ion is 
A)   ( )  
B)   (  2-)  
C)  (S2-)  
D)  (     2-)  
E)   (  ) " class="answers-bank-image d-inline" rel="preload" >  2-) 
E)   ( 2- ion is 
A)   ( )  
B)   (  2-)  
C)  (S2-)  
D)  (     2-)  
E)   (  ) " class="answers-bank-image d-inline" rel="preload" > ) F) None of the above
G) C) and D)

Question 6

Each of the three resonance structures of NO3- has how many lone pairs of electrons?

Accepted Answer

A)  7
B)  8
C)  9
D)  10
E)  13F) All of the above
G) B) and C)

Question 7

Which of the atoms listed below is the most electronegative?

Accepted Answer

A)  Li
B)  Cs
C)  P
D)  As
E)  GeF) A) and B)
G) A) and C)

Question 8

The bond in which of the following pairs of atoms would be the least polar (i.e., lowest percent ionic character) ?

Accepted Answer

A)  C - Cl
B)  C - C
C)  C - H
D)  O - C
E)  N - CF) All of the above
G) B) and C)

Question 9

Use the Born-Haber cycle to calculate the lattice energy of NaBr(s)given the
following data:
$\Delta$H(sublimation)Na = 109 kJ/mol
I1 (Na)= 496 kJ/mol
Bond energy (Br-Br)= 192 kJ/mol
EA (Br)= 324 kJ/mol
$\Delta$Hf (NaBr(s))= -361 kJ/mol

Accepted Answer

The answer of Use the Born-Haber cycle to calculate the...

Question 10

Write the Lewis structure for the product that forms when boron trifluoride combines with ammonia.

Accepted Answer

The answer of Write the Lewis structure for the product...

Question 11

Consider the hypothetical element Y with electron-dot formula  Give the formula for the simplest compound this element forms with chlorine.

Accepted Answer

The answer of Consider the hypothetical element Y with electron-dot...

Question 12

Use bond energies to estimate the enthalpy change for the reaction of one mole ofCH4 with chlorine gas to give CH3Cl and hydrogen chloride. BE(C-H) = 414 kJ/mol
BE(C-Cl) = 326 kJ/mol
BE(H-Cl) = 432 kJ/mol
BE(Cl-Cl) = 243 kJ/mol

Accepted Answer

A)  -101 kJ/mol
B)  -106 kJ/mol
C)  +331 kJ/mol
D)  +106 kJ/mol
E)  +101 kJ/molF) B) and C)
G) A) and E)

Question 13

The covalent bond with the greatest polarity would form in which of the atom pairs below?

Accepted Answer

A)  Br - Br
B)  S - O
C)  C - P
D)  C - O
E)  B - OF) A) and E)
G) None of the above

Question 14

Assuming the octet rule is obeyed, how many covalent bonds will a neon atom form to give a formal charge of zero?

Accepted Answer

A)  0
B)  1
C)  2
D)  3
E)  4F) C) and D)
G) A) and E)

Question 15

The formal charge on the sulfur atom in the resonance structure of sulfur dioxide which has one single bond and one double bond is

Accepted Answer

A)  0
B)  +1
C)  -1
D)  +2
E)  -2F) C) and D)
G) A) and E)

Question 16

In the best Lewis structure for the fulminate ion, CNO-, what is the formal charge on the central nitrogen atom?

Accepted Answer

A)  +2
B)  +1
C)  0
D)  -1
E)  -2F) B) and D)
G) B) and C)

Question 17

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

Accepted Answer

A)  NCl3
B)  BaCl2
C)  CO
D)  SO2
E)  SF4F) B) and E)
G) A) and D)

Question 18

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Accepted Answer

Question 19

Which one of these polar covalent bonds would have the greatest percent ionic character?

Accepted Answer

A)  H -Br
B)  H - Cl
C)  H - F
D)  H- IE) A) and B)
F) A) and C)

Question 20

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

Accepted Answer

A)  Rb2O
B)  BaO
C)  SrO
D)  SeO2
E)  MnO2F) A) and B)
G) C) and D)

Exam 9: Chemical Bonding I: Basic Concepts

What type of chemical bond holds the atoms together within a water molecule?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which one of these polar covalent bonds would have the greatest percent ionic character?

Correct AnswerverifiedShow Answer

The bond in which of the following pairs of atoms would be the least polar (i.e., lowest percent ionic character) ?

Correct AnswerverifiedShow Answer

The Lewis dot symbol for the S 2- ion is

Correct AnswerverifiedShow Answer

Which of the atoms listed below is the most electronegative?

Correct AnswerverifiedShow Answer

The formal charge on the sulfur atom in the resonance structure of sulfur dioxide which has one single bond and one double bond is

Correct AnswerverifiedShow Answer

The total number of lone pairs in NCl3 is

Correct AnswerverifiedShow Answer

Use bond energies to estimate the enthalpy change for the reaction of one mole ofCH4 with chlorine gas to give CH3Cl and hydrogen chloride. BE(C-H) = 414 kJ/mol BE(C-Cl) = 326 kJ/mol BE(H-Cl) = 432 kJ/mol BE(Cl-Cl) = 243 kJ/mol

Correct AnswerverifiedShow Answer

Assuming the octet rule is obeyed, how many covalent bonds will a neon atom form to give a formal charge of zero?

Correct AnswerverifiedShow Answer

Each of the three resonance structures of NO3- has how many lone pairs of electrons?

Correct AnswerverifiedShow Answer

Write a Lewis structure for the nitrate ion, NO3-, showing all non-zero formal charges.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The covalent bond with the greatest polarity would form in which of the atom pairs below?

Correct AnswerverifiedShow Answer

Which of the following solids would have the highest melting point?

Correct AnswerverifiedShow Answer

Write the Lewis structure for the product that forms when boron trifluoride combines with ammonia.

Correct AnswerverifiedShow Answer

In the best Lewis structure for the fulminate ion, CNO-, what is the formal charge on the central nitrogen atom?

Correct AnswerverifiedShow Answer

Write a Lewis structure for the phosphate ion, PO43-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct AnswerverifiedShow Answer

Use the Born-Haber cycle to calculate the lattice energy of NaBr(s)given the following data: Δ\DeltaΔ H(sublimation)Na = 109 kJ/mol I1 (Na)= 496 kJ/mol Bond energy (Br-Br)= 192 kJ/mol EA (Br)= 324 kJ/mol Δ\DeltaΔ Hf (NaBr(s))= -361 kJ/mol

Correct AnswerverifiedShow Answer

Consider the hypothetical element Y with electron-dot formula Give the formula for the simplest compound this element forms with chlorine.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The Lewis dot symbol for the S^2- ion is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The total number of lone pairs in NCl₃ is

Correct Answer
verified

Use bond energies to estimate the enthalpy change for the reaction of one mole ofCH₄ with chlorine gas to give CH₃Cl and hydrogen chloride. BE(C-H) = 414 kJ/mol BE(C-Cl) = 326 kJ/mol BE(H-Cl) = 432 kJ/mol BE(Cl-Cl) = 243 kJ/mol

Correct Answer
verified

Correct Answer
verified

Each of the three resonance structures of NO₃^- has how many lone pairs of electrons?

Correct Answer
verified

Write a Lewis structure for the nitrate ion, NO₃^-, showing all non-zero formal charges.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the best Lewis structure for the fulminate ion, CNO^-, what is the formal charge on the central nitrogen atom?

Correct Answer
verified

Write a Lewis structure for the phosphate ion, PO₄^3-, that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s).

Correct Answer
verified

Use the Born-Haber cycle to calculate the lattice energy of NaBr(s)given the following data: $\Delta$ H(sublimation)Na = 109 kJ/mol I₁ (Na)= 496 kJ/mol Bond energy (Br-Br)= 192 kJ/mol EA (Br)= 324 kJ/mol $\Delta$ H_f (NaBr(s))= -361 kJ/mol

Correct Answer
verified

Correct Answer
verified