Question 1

Use Lewis theory to determine the chemical formula for the compound formed between Ca and N.

Accepted Answer

A)  CaN
B)  Ca3N2
C)  CaN2
D)  Ca2N
E)  Ca2N3

Question 2

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)  Se
B)  C
C)  Li
D)  F
E)  All of the above elements can form compounds with an expanded octet.

Question 3

Which of the following contains an atom that does not obey the octet rule?

Accepted Answer

A)  CsI
B)  SnO2
C)  ClF5
D)  ClF

Question 4

Place the following in order of decreasing magnitude of lattice energy.
K2O Rb2S Li2O

Accepted Answer

A)  Li2O > K2O > Rb2S
B)  Li2O > Rb2S > K2O
C)  Rb2S > K2O > Li2O
D)  Rb2S > Li2O > K2O
E)  K2O > Li2O > Rb2S

Question 5

Which of the following represent the Lewis structure for Mg?

Accepted Answer

A)   
B)   
C)   
D)   
E)    C

Question 6

Choose the best Lewis structure for XeI2.

Accepted Answer

A)   2. 
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B)   2. 
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C)   2. 
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D)   2. 
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E)   2. 
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Question 7

Use Lewis theory to determine the chemical formula for the compound formed between Ba and I.

Accepted Answer

A)  BaI
B)  Ba2I3
C)  Ba3I2
D)  BaI2
E)  Ba2I D

Question 8

Which of the following elements can form compounds with an expanded octet?

Accepted Answer

A)  O
B)  Br
C)  F
D)  Be
E)  None of the above can form compounds with an expanded octet.

Question 9

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

Accepted Answer

A)  O(2 lone pairs) =C=N (2 lone pairs) 
B)  O(1 lone pair) ≡C-N(3 lone pairs) 
C)  O(1 lone pair) =C(2 lp) =N(1 lone pair) 
D)  O(3 lone pairs) -C≡N(with 1 lone pair) 
E)  They all contribute equally to the correct structure of OCN⁻.

Question 10

Which of the following represent the Lewis structure for Ca2⁺?

Accepted Answer

A)   2⁺? 
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C)     
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D)   2⁺? 
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E)   2⁺? 
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Question 11

Place the following elements in order of decreasing electronegativity.
S Cl Se

Accepted Answer

A)  Se > S > Cl
B)  Cl > Se > S
C)  Se > Cl > S
D)  S > Cl > Se
E)  Cl > S > Se

Question 12

Match the following.
-Ca-O

Accepted Answer

A)  weakest ionic bond
B)  strongest covalent bond
C)  metallic bond
D)  highest melting point
E)  longest covalent bondF) Na-BrG) C-F

Question 13

The phosphorus atom in PCl3 would be expected to have a

Accepted Answer

A)  partial positive (δ+) charge.
B)  partial negative (δ-) charge.
C)  3+ charge.
D)  3- charge.

Question 14

Choose the best Lewis structure for CH2Cl2.

Accepted Answer

A)   2Cl2. 
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B)   2Cl2. 
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C)   2Cl2. 
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D)   2Cl2. 
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E)   2Cl2. 
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Question 15

Place the following in order of increasing magnitude of lattice energy.
CaO MgO SrS

Accepted Answer

A)  MgO 
B)  SrS 
C)  SrS 
D)  CaO 
E)  CaO < SrS < MgO

Question 16

Of the following elements,which has the highest electronegativity?

Accepted Answer

A)  S
B)  Cl
C)  Ti
D)  Se

Question 17

How are electron affinity and electronegativity different?

Accepted Answer

Electron affinity is the process of a si...

Question 18

Place the following elements in order of increasing electronegativity.
Sr N Na

Accepted Answer

A)  Sr 
B)  Na 
C)  Sr 
D)  N 
E)  N < Na < Sr

Question 19

Which of the following represent the Lewis structure for S2⁻?

Accepted Answer

A)   2⁻? 
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B)   2⁻? 
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C)   2⁻? 
A)     
B)     
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D)   2⁻? 
A)     
B)     
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E)   2⁻? 
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Question 20

Use the bond energies provided to estimate ΔH°rxn for the reaction below.
CH3OH(l) + 2 O2(g) → CO2(g) + 2 H2O(g) ΔH°rxn = ?
Bond Bond Energy (kJ/mol) 
C-H 414
C-O 360
C=O 799
O=O 498
O-H 464

Accepted Answer

A)  +473 kJ
B)  -91 kJ
C)  -486 kJ
D)  -392 kJ
E)  +206 kJ

Exam 9: Chemical Bonding I: Lewis Theory

Use Lewis theory to determine the chemical formula for the compound formed between Ca and N.

Correct AnswerverifiedShow Answer

Which of the following elements can form compounds with an expanded octet?

Correct AnswerverifiedShow Answer

Which of the following contains an atom that does not obey the octet rule?

Correct AnswerverifiedShow Answer

Place the following in order of decreasing magnitude of lattice energy. K2O Rb2S Li2O

Correct AnswerverifiedShow Answer

Which of the following represent the Lewis structure for Mg?

Correct AnswerverifiedC

Choose the best Lewis structure for XeI2.

Correct AnswerverifiedShow Answer

Use Lewis theory to determine the chemical formula for the compound formed between Ba and I.

Correct AnswerverifiedD

Which of the following elements can form compounds with an expanded octet?

Correct AnswerverifiedShow Answer

Which of the following resonance structures for OCN⁻ will contribute most to the correct structure of OCN⁻?

Correct AnswerverifiedShow Answer

Which of the following represent the Lewis structure for Ca2⁺?

Correct AnswerverifiedShow Answer

Place the following elements in order of decreasing electronegativity. S Cl Se

Correct AnswerverifiedShow Answer

Match the following. -Ca-O

Correct AnswerverifiedShow Answer

The phosphorus atom in PCl3 would be expected to have a

Correct AnswerverifiedShow Answer

Choose the best Lewis structure for CH2Cl2.

Correct AnswerverifiedShow Answer

Place the following in order of increasing magnitude of lattice energy. CaO MgO SrS

Correct AnswerverifiedShow Answer

Of the following elements,which has the highest electronegativity?

Correct AnswerverifiedShow Answer

How are electron affinity and electronegativity different?

Correct AnswerverifiedElectron affinity is the process of a si...View AnswerShow Answer

Place the following elements in order of increasing electronegativity. Sr N Na

Correct AnswerverifiedShow Answer

Which of the following represent the Lewis structure for S2⁻?

Correct AnswerverifiedA

Use the bond energies provided to estimate ΔH°rxn for the reaction below. CH3OH(l) + 2 O2(g) → CO2(g) + 2 H2O(g) ΔH°rxn = ? Bond Bond Energy (kJ/mol) C-H 414 C-O 360 C=O 799 O=O 498 O-H 464

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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Place the following in order of decreasing magnitude of lattice energy. K₂O Rb₂S Li₂O

Correct Answer
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Correct Answer
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C

Choose the best Lewis structure for XeI₂.

Correct Answer
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Correct Answer
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D

Correct Answer
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Correct Answer
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Which of the following represent the Lewis structure for Ca²⁺?

Correct Answer
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Correct Answer
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The phosphorus atom in PCl₃ would be expected to have a

Correct Answer
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Choose the best Lewis structure for CH₂Cl₂.

Correct Answer
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Correct Answer
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Electron affinity is the process of a si...
View Answer

Correct Answer
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Which of the following represent the Lewis structure for S²⁻?

Correct Answer
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A

Use the bond energies provided to estimate ΔH°_rxn for the reaction below. CH₃OH(l) + 2 O₂(g) → CO₂(g) + 2 H₂O(g) ΔH°_rxn= ? Bond Bond Energy (kJ/mol) C-H 414 C-O 360 C=O 799 O=O 498 O-H 464

Correct Answer
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