Question 1

Which of the following is nonpolar?

Accepted Answer

A)   H2O
B)   CO2
C)   SF2
D)   ICl3
E)   NCl3F) A) and B)
G) C) and D)

Question 2

Which of the following series is isoelectronic?

Accepted Answer

A)   B, C, N, O
B)   Sn, As, S, F
C)   Na, K, Rb, Cs
D)   S2-, Cl-, K+, Ca2+
E)   F-, Cl-, K+, Rb+F) A) and D)
G) A) and C)

Question 3

Select the correct molecular structure for PO43-.

Accepted Answer

A)   square planar
B)   octahedral
C)   pyramidal
D)   tetrahedral
E)   none of theseF) A) and C)
G) C) and D)

Question 4

Given the following Lewis structure: 
-How many unshared pairs of electrons are present in this molecule?

Accepted Answer

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

Question 5

Choose the molecule with the strongest bond.

Accepted Answer

A)   HBr
B)   HCl
C)   HF
D)   HIE) B) and C)
F) All of the above

Question 6

Refer to the SeFS1U1B14S1U1B0 molecule.
-What are the angles of the Se-F bonds?

Accepted Answer

The answer of Refer to the SeFS1U1B14S1U1B0 molecule.
-What are the...

Question 7

Which of the following statements about the species N2, CO, CN- and NO+ is false?

Accepted Answer

A)   All are isoelectronic.
B)   The bond in each species is polar.
C)   All are linear.
D)   Each contains a triple bond.E) B) and D)
F) All of the above

Question 8

Estimate the bond energy of the N2 molecule. 2 molecule.   for NH3 = -46.0 kJ/mol N-H bond energy = 391 kJ/mol H-H bond energy = 432 kJ/mol A)  1140 kJ/mol B)  560 kJ/mol C)  87 kJ/mol D)  479 kJ/mol E)  958 kJ/mol " class="answers-bank-image d-inline" rel="preload" > for NH3 = -46.0 kJ/mol N-H bond energy = 391 kJ/mol
H-H bond energy = 432 kJ/mol

Accepted Answer

A)   1140 kJ/mol
B)   560 kJ/mol
C)   87 kJ/mol
D)   479 kJ/mol
E)   958 kJ/molF) B) and E)
G) D) and E)

Question 9

How many lone pairs of electrons are around the central atom?

Accepted Answer

one lone p...

Question 10

How many electrons are in the Lewis structure for NO2-?

Accepted Answer

A)   18
B)   20
C)   32
D)   16
E)   30F) C) and D)
G) All of the above

Question 11

Select the correct molecular structure for PO33-.

Accepted Answer

A)   tetrahedral
B)   octahedral
C)   square planar
D)   pyramidal
E)   none of theseF) C) and D)
G) A) and E)

Question 12

A quantum chemistry program indicates that the dipole moment of PH3 is zero. Which statement(s)  best explains this result?

Accepted Answer

A)   PH3 is a trigonal planar structure and the bond dipoles cancel.
B)   PH3 violates the octet rule and does not exist.
C)   The electronegativities of P and H are very close in value; therefore, no bond dipoles exist.
D)   A and C only
E)   A, B, and CF) B) and D)
G) A) and C)

Question 13

Which compound does not contain both polar covalent and ionic bonds?

Accepted Answer

A)   Mg(CN) 2
B)   NH4ClO2
C)   C2H5OH
D)   NaOH
E)   RbC2H3O2F) A) and D)
G) A) and C)

Question 14

Which of the following molecules has a nonzero dipole moment?

Accepted Answer

A)   CS2
B)   SiF4
C)   CH4
D)   SO3
E)   PBr3F) C) and E)
G) B) and D)

Question 15

Select the correct molecular structure for XeF4.

Accepted Answer

A)   tetrahedral
B)   bent
C)   pyramidal
D)   linear
E)   none of theseF) B) and D)
G) C) and D)

Question 16

According to the VSEPR model, the electron pairs around NH3 and those around CH4 are arranged

Accepted Answer

A)   differently, because in each case there are a different number of atoms around the central atom.
B)   the same, because both nitrogen and carbon are in the second period.
C)   differently, because in each case there are a different number of electron pairs around the central atom.
D)   differently or the same, depending on the conditions leading to maximum repulsion.
E)   the same, because in each case there are the same number of electron pairs around the central atom.F) A) and E)
G) C) and E)

Question 17

In which of the following compounds does the bond between the central atom and fluorine have the greatest ionic character?

Accepted Answer

A)   SF2
B)   SeF2
C)   OF2
D)   SbF3
E)   AsF3F) A) and B)
G) A) and C)

Question 18

Which element listed below has the highest electronegativity?

Accepted Answer

A)   K
B)   Te
C)   Br
D)   I
E)   RbF) A) and B)
G) B) and E)

Question 19

For which compound is resonance required to describe the structure adequately?

Accepted Answer

A)   PCl3
B)   CO32-
C)   HCN
D)   NH4+
E)   none of theseF) C) and D)
G) B) and E)

Question 20

As a general pattern, electronegativity is inversely related to

Accepted Answer

A)   atomic size
B)   polarity of the atom.
C)   the number of neutrons in the nucleus.
D)   ionization energy.
E)   two of these.F) None of the above
G) A) and D)

Exam 13: Bonding: General Concepts

Which element listed below has the highest electronegativity?

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Select the correct molecular structure for XeF4.

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Select the correct molecular structure for PO33-.

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Given the following Lewis structure: -How many unshared pairs of electrons are present in this molecule?

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As a general pattern, electronegativity is inversely related to

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Which compound does not contain both polar covalent and ionic bonds?

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How many lone pairs of electrons are around the central atom?

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Which of the following series is isoelectronic?

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Refer to the SeF4 molecule. -What are the angles of the Se-F bonds?

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Estimate the bond energy of the N2 molecule. for NH3 = -46.0 kJ/mol N-H bond energy = 391 kJ/mol H-H bond energy = 432 kJ/mol

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Which of the following statements about the species N2, CO, CN- and NO+ is false?

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Choose the molecule with the strongest bond.

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In which of the following compounds does the bond between the central atom and fluorine have the greatest ionic character?

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According to the VSEPR model, the electron pairs around NH3 and those around CH4 are arranged

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A quantum chemistry program indicates that the dipole moment of PH3 is zero. Which statement(s) best explains this result?

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Which of the following is nonpolar?

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For which compound is resonance required to describe the structure adequately?

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Select the correct molecular structure for PO43-.

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How many electrons are in the Lewis structure for NO2-?

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Which of the following molecules has a nonzero dipole moment?

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Select the correct molecular structure for XeF₄.

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Select the correct molecular structure for PO₃³^-.

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one lone p...
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Refer to the SeF₄ molecule. -What are the angles of the Se-F bonds?

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Estimate the bond energy of the N₂ molecule. for NH₃ = -46.0 kJ/mol N-H bond energy = 391 kJ/mol H-H bond energy = 432 kJ/mol

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Which of the following statements about the species N₂, CO, CN^- and NO⁺ is false?

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According to the VSEPR model, the electron pairs around NH₃ and those around CH₄ are arranged

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A quantum chemistry program indicates that the dipole moment of PH₃ is zero. Which statement(s) best explains this result?

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Select the correct molecular structure for PO₄³^-.

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How many electrons are in the Lewis structure for NO₂^-?

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