Question 1

Why does the best Lewis structure for sulfuric acid (H2SO4)Have the sulfur atom formally possessing five bonds?

Accepted Answer

A)  This configuration gives all atoms in the molecule a formal charge of 0. 
B)  It is the best expanded octet structure for the molecule. 
C)  It doesn't; it should possess four bonds. 
D)  It doesn't; it should possess six bonds. 
A)  This configuration gives all atoms in the molecule a formal charge of 0. 
B)  It is the best expanded octet structure for the molecule. 
C)  It doesn't; it should possess four bonds. 
D)  It doesn't; it should possess six bonds.

Question 2

Which of the following has the longest bond?

Accepted Answer

A)  N2  
B)  NO- 
C)  N22+ 
D)  N22- 
E)  O22- 
A)  N2  
B)  NO- 
C)  N22+ 
D)  N22- 
E)  O22-

Question 3

How many$ \sigma $- and $\pi $-bonds, respectively,Are there in acrolein, CH2=CHCHO?

Accepted Answer

A)  4 and 2 
B)  7 and 2 
C)  5 and 2 
D)  5 and 4 
E)  7 and 1 
A)  4 and 2 
B)  7 and 2 
C)  5 and 2 
D)  5 and 4 
E)  7 and 1

Question 4

Consider the following equilibrium:
S2O42-(aq)$\Leftrightarrow$2SO2-(aq)
K ~ 10-9Write a Lewis structure for each species.

Accepted Answer

The arrangement of atoms in S₂O

Question 5

Which of the following has bond angles of 90$\circ$, 120$\circ$,
And 180$\circ$?

Accepted Answer

A)  PF6- 
B)  IF5  
C)  XeF4  
D)  ICl4- 
E)  SF4  
A)  PF6- 
B)  IF5  
C)  XeF4  
D)  ICl4- 
E)  SF4

Question 6

How many double bonds are present in the "best" resonance structure of the phosphate ion?

Accepted Answer

A)  2 
B)  3 
C)  1 
D)  0 
A)  2 
B)  3 
C)  1 
D)  0

Question 7

The molecules OF2 and O3 both have bent shapes . What are the approximate bond angles in OF2 and O3, Respectively?

Accepted Answer

A)  109o and 120o 
B)  Both 109o 
C)  Both 120o 
D)  Both 180o 
E)  109o and 180o 
A)  109o and 120o 
B)  Both 109o 
C)  Both 120o 
D)  Both 180o 
E)  109o and 180o

Question 8

The electron arrangement and shape in IF4+,respectively,are

Accepted Answer

trigonal b

Question 9

Gallium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?

Accepted Answer

A)  Si 
B)  Sb 
C)  B 
D)  P 
E)  As 
A)  Si 
B)  Sb 
C)  B 
D)  P 
E)  As

Question 10

For dinitrogen monoxide, the arrangement of the atoms is N-N-O.In the Lewis structure with a double bond between NN and NO,The formal charges on N,N,And O,Respectively,Are

Accepted Answer

A)  0, -1, +1. 
B)  -1, +1, 0. 
C)  0, +1, -1. 
D)  0, 0, 0. 
E)  -2, +1, +1. 
A)  0, -1, +1. 
B)  -1, +1, 0. 
C)  0, +1, -1. 
D)  0, 0, 0. 
E)  -2, +1, +1.

Question 11

Identify the hybrid orbitals used by the underlined atom in acetone, CH3COCH3.

Accepted Answer

A)  sp3d 
B)  sp2  
C)  None; pure pz-orbitals are used in bonding. 
D)  sp3  
E)  sp 
A)  sp3d 
B)  sp2  
C)  None; pure pz-orbitals are used in bonding. 
D)  sp3  
E)  sp

Question 12

For the ground-state ion Bi3+, what type of orbital do the electrons with highest energy reside in?

Accepted Answer

A)  5d 
B)  6s 
C)  4f 
D)  5p 
E)  6p 
A)  5d 
B)  6s 
C)  4f 
D)  5p 
E)  6p

Question 13

How many electrons are in the expanded valence in H2SO4?

Accepted Answer

A)  12 
B)  14 
C)  8 
D)  6 
E)  10 
A)  12 
B)  14 
C)  8 
D)  6 
E)  10

Question 14

The OSO bond angle in the sulfite ion is ___________________ (greater than/equal to/ less than)109.5$\omicron $

Accepted Answer

Question 15

Predict the electron arrangement in IF5.

Accepted Answer

Question 16

The hybrid orbitals used by the underlined atoms in CH2CHCHO, from left to right,Respectively,Are

Accepted Answer

A)  sp3 and sp2.  
B)  sp2 and sp2.  
C)  sp2 and sp. 
D)  sp and sp. 
E)  sp3 and sp. 
A)  sp3 and sp2.  
B)  sp2 and sp2.  
C)  sp2 and sp. 
D)  sp and sp. 
E)  sp3 and sp.

Question 17

How many lone pairs of electrons are there in the Lewis structure of Al2Cl6?

Accepted Answer

A)  24 
B)  12 
C)  4 
D)  16 
A)  24 
B)  12 
C)  4 
D)  16

Question 18

The hybrid orbitals used by the underlined atoms in CH3CH2OCH2CH3, from left to right,Respectively,Are

Accepted Answer

A)  sp and sp. 
B)  sp3 and sp. 
C)  sp3 and sp3.  
D)  sp and sp3.  
E)  sp2 and sp3.  
A)  sp and sp. 
B)  sp3 and sp. 
C)  sp3 and sp3.  
D)  sp and sp3.  
E)  sp2 and sp3.

Question 19

Of the following molecules, which has the strongest bonds?

Accepted Answer

A)  H2O 
B)  H2Se 
C)  H2Te 
D)  H2S 
A)  H2O 
B)  H2Se 
C)  H2Te 
D)  H2S

Question 20

What is the shape of CS32-?

Accepted Answer

A)  Trigonal pyramidal 
B)  Trigonal planar 
C)  T-shaped 
D)  Tetrahedral 
E)  Seesaw 
A)  Trigonal pyramidal 
B)  Trigonal planar 
C)  T-shaped 
D)  Tetrahedral 
E)  Seesaw

Why does the best Lewis structure for sulfuric acid (H₂SO₄)Have the sulfur atom formally possessing five bonds?

Which of the following has the longest bond?

How many $\sigma$ - and $\pi$ -bonds, respectively,Are there in acrolein, CH₂=CHCHO?

Consider the following equilibrium: S₂O₄²^-(aq) $\Leftrightarrow$ 2SO₂^-(aq) K ~ 10^-⁹Write a Lewis structure for each species.

Which of the following has bond angles of 90^$\circ$, 120^$\circ$, And 180^$\circ$?

How many double bonds are present in the "best" resonance structure of the phosphate ion?

The molecules OF₂ and O₃ both have bent shapes . What are the approximate bond angles in OF₂ and O₃, Respectively?

The electron arrangement and shape in IF₄⁺,respectively,are

Gallium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?

For dinitrogen monoxide, the arrangement of the atoms is N-N-O.In the Lewis structure with a double bond between NN and NO,The formal charges on N,N,And O,Respectively,Are

Identify the hybrid orbitals used by the underlined atom in acetone, CH₃COCH₃.

For the ground-state ion Bi³⁺, what type of orbital do the electrons with highest energy reside in?

How many electrons are in the expanded valence in H₂SO₄?

The OSO bond angle in the sulfite ion is ___________________ (greater than/equal to/ less than)109.5^$\omicron$

Predict the electron arrangement in IF₅.

The hybrid orbitals used by the underlined atoms in CH₂CHCHO, from left to right,Respectively,Are

How many lone pairs of electrons are there in the Lewis structure of Al₂Cl₆?

The hybrid orbitals used by the underlined atoms in CH₃CH₂OCH₂CH₃, from left to right,Respectively,Are

Of the following molecules, which has the strongest bonds?

What is the shape of CS₃^2-?

Atoms

States of Matter

Thermodynamics

Equilibrium

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Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

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Exam 2: Molecules

Why does the best Lewis structure for sulfuric acid (H2SO4)Have the sulfur atom formally possessing five bonds?

Which of the following has the longest bond?

How many σ \sigma σ - and π\pi π -bonds, respectively,Are there in acrolein, CH2=CHCHO?

Consider the following equilibrium: S2O42-(aq) ⇔\Leftrightarrow⇔ 2SO2-(aq) K ~ 10-9Write a Lewis structure for each species.

Which of the following has bond angles of 90 ∘\circ∘ , 120 ∘\circ∘ , And 180 ∘\circ∘ ?

How many double bonds are present in the "best" resonance structure of the phosphate ion?

The molecules OF2 and O3 both have bent shapes . What are the approximate bond angles in OF2 and O3, Respectively?

The electron arrangement and shape in IF4+,respectively,are

Gallium is a semiconductor .Which of the following should be added in small amounts to produce a p-type semiconductor?

For dinitrogen monoxide, the arrangement of the atoms is N-N-O.In the Lewis structure with a double bond between NN and NO,The formal charges on N,N,And O,Respectively,Are

Identify the hybrid orbitals used by the underlined atom in acetone, CH3COCH3.

For the ground-state ion Bi3+, what type of orbital do the electrons with highest energy reside in?

How many electrons are in the expanded valence in H2SO4?

The OSO bond angle in the sulfite ion is ___________________ (greater than/equal to/ less than)109.5 ο\omicron ο

Predict the electron arrangement in IF5.

The hybrid orbitals used by the underlined atoms in CH2CHCHO, from left to right,Respectively,Are

How many lone pairs of electrons are there in the Lewis structure of Al2Cl6?

The hybrid orbitals used by the underlined atoms in CH3CH2OCH2CH3, from left to right,Respectively,Are

Of the following molecules, which has the strongest bonds?

What is the shape of CS32-?

Atoms

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

Why does the best Lewis structure for sulfuric acid (H₂SO₄)Have the sulfur atom formally possessing five bonds?

How many $\sigma$ - and $\pi$ -bonds, respectively,Are there in acrolein, CH₂=CHCHO?

Consider the following equilibrium: S₂O₄²^-(aq) $\Leftrightarrow$ 2SO₂^-(aq) K ~ 10^-⁹Write a Lewis structure for each species.

Which of the following has bond angles of 90^$\circ$, 120^$\circ$, And 180^$\circ$?

The molecules OF₂ and O₃ both have bent shapes . What are the approximate bond angles in OF₂ and O₃, Respectively?

The electron arrangement and shape in IF₄⁺,respectively,are

Identify the hybrid orbitals used by the underlined atom in acetone, CH₃COCH₃.

For the ground-state ion Bi³⁺, what type of orbital do the electrons with highest energy reside in?

How many electrons are in the expanded valence in H₂SO₄?

The OSO bond angle in the sulfite ion is ___________________ (greater than/equal to/ less than)109.5^$\omicron$

Predict the electron arrangement in IF₅.

The hybrid orbitals used by the underlined atoms in CH₂CHCHO, from left to right,Respectively,Are

How many lone pairs of electrons are there in the Lewis structure of Al₂Cl₆?

The hybrid orbitals used by the underlined atoms in CH₃CH₂OCH₂CH₃, from left to right,Respectively,Are

What is the shape of CS₃^2-?