Question 1

The total number of lone pairs in NCl3 is

Accepted Answer

A)   6.
B)   8.
C)   9.
D)   10.
E)   13.F) D) and E)
G) A) and B)

Question 2

How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

Accepted Answer

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

Question 3

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

Accepted Answer

A)   NaCl
B)   NaF
C)   CaBr2
D)   CsI
E)   CaCl2F) A) and B)
G) C) and D)

Question 4

The following correctly depicts the Lewis dot symbol for the sulfide ion.

Accepted Answer

A) True 
 B)False

Question 5

List all types of bonding present in the molecule SO3.
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 IIIF) D) and E)
G) All of the above

Question 6

The total number of valence electrons in the molecule P2O5 is

Accepted Answer

A)   11.
B)   22.
C)   23.
D)   40.
E)   70.F) B) and E)
G) A) and B)

Question 7

Use bond energies to estimate the enthalpy change for the reaction of one mole of CH4 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)   -106 kJ/mol
B)   -101 kJ/mol
C)   +101 kJ/mol
D)   +106 kJ/mol
E)   +331 kJ/molF) B) and C)
G) A) and E)

Question 8

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) A) and B)
G) A) and C)

Question 9

Arrange the following bonds in order of increasing ionic character:
C - F
O - F
H - F

Na - F

Accepted Answer

A)   C - F 
B)   C - F 
C)   O - F 
D)   H - F 
E)   Na - F < H - F < C - F < O - FF) A) and B)
G) A) and C)

Question 10

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

Accepted Answer

A)   Br2
B)   O2
C)   N2
D)   H2
E)   CH4F) All of the above
G) A) and E)

Question 11

The molecule NH2NH2 shows both ionic and covalent bonding.

Accepted Answer

A) True 
 B)False

Question 12

Complete this statement: Coulomb's law states that the magnitude of the  force of interaction‾\underline{	ext{force of interaction}}force of interaction​  between two charged bodies is

Accepted Answer

A)   directly proportional to the product of the charges on the bodies and directly proportional to the distance separating them.
B)   directly proportional to the product of the charges on the bodies, and inversely proportional to the square of the distance separating them.
C)   inversely proportional to the product of the charges on the bodies, and directly proportional to the square of the distance separating them.
D)   directly proportional to the sum of the charges on the bodies, and inversely proportional to the square of the distance separating them. E) A) and C)
F) None of the above

Question 13

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

Question 14

The following Lewis dot symbol correctly depicts the chloride ion.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

A)   N2O
B)   CS2
C)   PH3
D)   CCl4
E)   NO2F) A) and E)
G) C) and E)

Question 16

Which one of the following compounds does not follow the octet rule

Accepted Answer

A)   NF3
B)   CO2
C)   CF4
D)   Br2
E)   NOF) A) and C)
G) A) and E)

Question 17

The following Lewis structure depicts the product when boron trifluoride combines with ammonia. How many total valence electrons are shown in this structure

Accepted Answer

A)   28
B)   30
C)   32
D)   34
E)   None of the aboveF) A) and C)
G) C) and D)

Question 18

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)   LiFF) None of the above
G) A) and B)

Question 19

The number of resonance structures for the nitrate ion that satisfy the octet rule is

Accepted Answer

A)   1
B)   2
C)   3
D)   4
E)   None of theseF) A) and B)
G) None of the above

Question 20

Arrange the following bonds in order of increasing ionic character: 
 B−CB - CB−C 
 C−NC - NC−N 
 C−OC - OC−O 
 C−CC - CC−C

Accepted Answer

A)   B - C 
B)   C - C 
C)   C - C 
D)   C - O 
E)   C - N < C - C < B - C < C - O F) C) and D)
G) B) and C)

Exam 9: Chemical Bonding I: Basic Concepts

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

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The following Lewis structure depicts the product when boron trifluoride combines with ammonia. How many total valence electrons are shown in this structure

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Arrange the following bonds in order of increasing ionic character: C - F O - F H - F Na - F

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How many covalent bonds will be drawn to phosphorous in PO43- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

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List all types of bonding present in the molecule SO3. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

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

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The following Lewis dot symbol correctly depicts the chloride ion.

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Arrange the following bonds in order of increasing ionic character: B−CB - CB−C C−NC - NC−N C−OC - OC−O C−CC - CC−C

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

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Complete this statement: Coulomb's law states that the magnitude of the force of interaction‾\underline{\text{force of interaction}}force of interaction​ between two charged bodies is

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The following correctly depicts the Lewis dot symbol for the sulfide ion.

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The total number of lone pairs in NCl3 is

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

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The molecule NH2NH2 shows both ionic and covalent bonding.

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Use bond energies to estimate the enthalpy change for the reaction of one mole of CH4 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

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

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Which one of the following compounds does not follow the octet rule

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The total number of valence electrons in the molecule P2O5 is

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

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The number of resonance structures for the nitrate ion that satisfy the octet rule is

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How many covalent bonds will be drawn to phosphorous in PO₄^3- for the dot structure that expands the octet to minimize formal charge and if necessary places negative formal charges on the most electronegative atom(s)

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List all types of bonding present in the molecule SO₃. I. ionic bond II. polar covalent bond III. nonpolar covalent bond

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Arrange the following bonds in order of increasing ionic character: $B - C$ $C - N$ $C - O$ $C - C$

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

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Complete this statement: Coulomb's law states that the magnitude of the $\underline{\text{force of interaction}}$ between two charged bodies is

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The total number of lone pairs in NCl₃ is

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The molecule NH₂NH₂ shows both ionic and covalent bonding.

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Use bond energies to estimate the enthalpy change for the reaction of one mole of CH₄ 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

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The total number of valence electrons in the molecule P₂O₅ is

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