Question 1

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

Accepted Answer

A)  ionic
B)  polar covalent
C)  nonpolar covalentD) None of the above
E) B) and C)

Question 2

The azide ion, N3-, is very reactive although it is isoelectronic with the very stable CO2 molecule. This reactivity is reasonable inasmuch as

Accepted Answer

A)  a Lewis structure cannot be written for the azide ion that has nitrogen formal charges of zero.
B)  there is no valid Lewis structure possible for the azide ion.
C)  there are resonance structures for azide ion but not for carbon dioxide.
D)  nitrogen cannot form multiple bonds.
E)  charged species always decompose in solution.F) A) and E)
G) B) and C)

Question 3

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Accepted Answer

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

Question 4

The electron dot structure for AsCl3 shows

Accepted Answer

A)  a total of 84 electron dots.
B)  three single bonds and 10 lone pairs.
C)  two single bonds, one double bond, and 9 lone pairs.
D)  one single bond, two double bonds, and 8 lone pairs.
E)  three single bonds and one lone pair.F) A) and E)
G) D) and E)

Question 5

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) B) and D)
G) A) and E)

Question 6

Classify the O - H bond in CH3OH as ionic, polar covalent, or nonpolar covalent.

Accepted Answer

A)  ionic
B)  polar covalent
C)  nonpolar covalentD) None of the above
E) All of the above

Question 7

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) None of the above
G) D) and E)

Question 8

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 9

Write a Lewis structure for SO3 that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO3 that obey the octet rule.

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> Total number of res...

Question 10

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) A) and C)

Question 11

Which of the following Lewis structures is incorrect?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) B) and E)
G) C) and D)

Question 12

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

Accepted Answer

A)  ClF3
B)  FeCl3
C)  NH3
D)  PF3
E)  SO3F) A) and E)
G) A) and B)

Question 13

A charge of 2+ is most likely to occur for an ion formed from an atom whose electron configuration is 1s22s22p63s23p4.

Accepted Answer

A) True 
 B)False

Question 14

Write the Lewis dot symbol for the chloride ion.

Accepted Answer

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

Question 15

Estimate the enthalpy change for the reaction 2CO + O2 →\rarr→  2CO2 given the following bond energies. BE(C ≡\equiv≡ O) = 1074 kJ/mol
BE(O=O) = 499 kJ/mol
BE(C=O) = 802 kJ/mol

Accepted Answer

A)  +2380 kJ/mol
B)  +744 kJ/mol
C)  +1949 kJ/mol
D)  -561 kJ/mol
E)  -744 kJ/mol F) C) and D)
G) All of the above

Question 16

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Accepted Answer

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

Question 17

The number of lone electron pairs in the NO2- ion is ___.

Accepted Answer

A)  4
B)  5
C)  6
D)  7
E)  8F) A) and B)
G) C) and D)

Question 18

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

The answer of Calculate the energy required for the gas...

Exam 9: Chemical Bonding I: the Covalent Bond

Write a Lewis structure for SO₃ that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO₃ that obey the octet rule.

Correct Answer
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Total number of res...
View Answer

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

Correct Answer
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The electron dot structure for AsCl₃ shows

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

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

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

Correct Answer
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The number of lone electron pairs in the NO₂^- ion is ___.

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

Correct Answer
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Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct Answer
verified

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

Correct Answer
verified

Write the Lewis dot symbol for the chloride ion.

Correct Answer
verified

A charge of 2+ is most likely to occur for an ion formed from an atom whose electron configuration is 1s²2s²2p⁶3s²3p⁴.

Correct Answer
verified

The azide ion, N₃^-, is very reactive although it is isoelectronic with the very stable CO₂ molecule. This reactivity is reasonable inasmuch as

Correct Answer
verified

Which of the following Lewis structures is incorrect?

Correct Answer
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What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Correct Answer
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Estimate the enthalpy change for the reaction 2CO + O₂ $\rarr$ 2CO₂ given the following bond energies. BE(C $\equiv$ O) = 1074 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol

Correct Answer
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Classify the O - H bond in CH₃OH as ionic, polar covalent, or nonpolar covalent.

Correct Answer
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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

Exam 9: Chemical Bonding I: the Covalent Bond

Write a Lewis structure for SO3 that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO3 that obey the octet rule.

Correct Answerverified Total number of res...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

The electron dot structure for AsCl3 shows

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The number of lone electron pairs in the NO2- ion is ___.

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

Nitrous oxide, N2O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Write the Lewis dot symbol for the chloride ion.

Correct AnswerverifiedShow Answer

A charge of 2+ is most likely to occur for an ion formed from an atom whose electron configuration is 1s22s22p63s23p4.

Correct AnswerverifiedShow Answer

The azide ion, N3-, is very reactive although it is isoelectronic with the very stable CO2 molecule. This reactivity is reasonable inasmuch as

Correct AnswerverifiedShow Answer

Which of the following Lewis structures is incorrect?

Correct AnswerverifiedShow Answer

What is the formal charge on phosphorus in a Lewis structure for the phosphate ion that satisfies the octet rule?

Correct AnswerverifiedShow Answer

Estimate the enthalpy change for the reaction 2CO + O2 →\rarr→ 2CO2 given the following bond energies. BE(C ≡\equiv≡ O) = 1074 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol

Correct AnswerverifiedShow Answer

Classify the O - H bond in CH3OH as ionic, polar covalent, or nonpolar covalent.

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

Write a Lewis structure for SO₃ that obeys the octet rule, showing all non-zero formal charges, and give the total number of resonance structures for SO₃ that obey the octet rule.

Correct Answer
verified
Total number of res...
View Answer

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

Correct Answer
verified

The electron dot structure for AsCl₃ shows

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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The number of lone electron pairs in the NO₂^- ion is ___.

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

Correct Answer
verified

Nitrous oxide, N₂O, is sometimes called "laughing gas". What is the formal charge on the central nitrogen atom in the best Lewis structure for nitrous oxide? (The atom connectivity is N-N-O.)

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

A charge of 2+ is most likely to occur for an ion formed from an atom whose electron configuration is 1s²2s²2p⁶3s²3p⁴.

Correct Answer
verified

The azide ion, N₃^-, is very reactive although it is isoelectronic with the very stable CO₂ molecule. This reactivity is reasonable inasmuch as

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Estimate the enthalpy change for the reaction 2CO + O₂ $\rarr$ 2CO₂ given the following bond energies. BE(C $\equiv$ O) = 1074 kJ/mol BE(O=O) = 499 kJ/mol BE(C=O) = 802 kJ/mol

Correct Answer
verified

Classify the O - H bond in CH₃OH as ionic, polar covalent, or nonpolar covalent.

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