Question 1

Which of the following has resonance structures?

Accepted Answer

A)  XeOF2 
B)  N2H4 
C)  CH3CONH- 
D)  H2CO 
A)  XeOF2 
B)  N2H4 
C)  CH3CONH- 
D)  H2CO

Question 2

Which of the following statements is true?

Accepted Answer

A)  Atoms with high ionization energies and high electron affinities are highly electronegative. 
B)  Atoms with high ionization energies and high electron affinities have low electronegativities. 
C)  The electronegativity of an atom depends only on the value of the ionization energy of the atom. 
D)  Atoms with low ionization energies and low electron affinities have high electronegativities. 
E)  The electronegativity of an atom is defined as half the electron affinity of the atom. 
A)  Atoms with high ionization energies and high electron affinities are highly electronegative. 
B)  Atoms with high ionization energies and high electron affinities have low electronegativities. 
C)  The electronegativity of an atom depends only on the value of the ionization energy of the atom. 
D)  Atoms with low ionization energies and low electron affinities have high electronegativities. 
E)  The electronegativity of an atom is defined as half the electron affinity of the atom.

Question 3

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide, H2NC(O)NNC(O)NH2?

Accepted Answer

A)  8 
B)  12 
C)  10 
D)  16 
E)  6 
A)  8 
B)  12 
C)  10 
D)  16 
E)  6

Question 4

What is the shape of the molecule AX4E2?

Accepted Answer

A)  Octahedral 
B)  Tetrahedral 
C)  Seesaw 
D)  Square planar 
E)  Square pyramidal 
A)  Octahedral 
B)  Tetrahedral 
C)  Seesaw 
D)  Square planar 
E)  Square pyramidal

Question 5

Which of the following has the highest lattice energy?

Accepted Answer

A)  NaCl 
B)  KI 
C)  MgO 
D)  BaO 
E)  CaO 
A)  NaCl 
B)  KI 
C)  MgO 
D)  BaO 
E)  CaO

Question 6

Why is the bond dissociation energy of C-C greater than that of C-H?

Accepted Answer

A)  Because of enhanced sigma bond overlap 
B)  Because the bond is electrostatically stronger 
C)  Because multiple bonds are always stronger than single bonds 
D)  Because of the decreased bond dipole 
E)  It isn't, the dissociation energy is greater for C-H 
A)  Because of enhanced sigma bond overlap 
B)  Because the bond is electrostatically stronger 
C)  Because multiple bonds are always stronger than single bonds 
D)  Because of the decreased bond dipole 
E)  It isn't, the dissociation energy is greater for C-H

Question 7

Both C2 and C22- are diamagnetic.

Accepted Answer

A) True 
 B)False

Question 8

For HF, the LCAO-MO, $\Psi $=cH$\Psi $H +cF$\Psi $F,has cH = cF.

Accepted Answer

A) True 
 B)False

Question 9

Write three Lewis structures for the cyanate ion, NCO-,Where the arrangement of atoms is N-C-O.In the most plausible structure,

Accepted Answer

A)  there is a triple bond between N and C. 
B)  there are two double bonds. 
C)  there is a triple bond between C and O. 
D)  the formal charge on O is +1. 
E)  the formal charge on N is -1. 
A)  there is a triple bond between N and C. 
B)  there are two double bonds. 
C)  there is a triple bond between C and O. 
D)  the formal charge on O is +1. 
E)  the formal charge on N is -1.

Question 10

Estimate the CN bond length in urea, NH2CONH2.Given: covalent radii (pm)Of C-,77; C=,67; N-,75; N=,60;O-,74; O=,60; H,37.

Accepted Answer

A)  71 pm 
B)  127 pm 
C)  76 pm 
D)  152 pm 
E)  142 pm 
A)  71 pm 
B)  127 pm 
C)  76 pm 
D)  152 pm 
E)  142 pm

Question 11

The Madelung constant is different for all crystals.

Accepted Answer

A) True 
 B)False

Question 12

Match each of the following compounds with its lattice energy.
$$\text { KI, LiF, } \mathrm { MgF } _ { 2 } \text {, LiI } \quad 2961,1046,759,645 \mathrm {~kJ} / \mathrm { mol }$$

Accepted Answer

MgF₂ (2961), LiF (104

Question 13

What is the shape of SO32-?

Accepted Answer

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

Question 14

All the following are polar except

Accepted Answer

A)  SS1U1B13S1U1B0S1U1P12S1S1P0S1U1P1-S1S1P0S1S1P0 
B)  NHS1U1B12S1U1B0S1U1P1-S1S1P0 
C)  IS1U1B13S1U1B0S1U1P1-S1S1P0 
D)  OS1U1B13S1U1B0 
E)  IS1U1B13S1U1B0S1U1P1+S1S1P0 
A)  SS1U1B13S1U1B0S1U1P12S1S1P0S1U1P1-S1S1P0S1S1P0 
B)  NHS1U1B12S1U1B0S1U1P1-S1S1P0 
C)  IS1U1B13S1U1B0S1U1P1-S1S1P0 
D)  OS1U1B13S1U1B0 
E)  IS1U1B13S1U1B0S1U1P1+S1S1P0

Question 15

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of rubidium chloride ion-pairs, that is,the energy change for the following reaction:
Rb+(g)+Cl-(g) $\rightarrow$ Rb+Cl-(g) Use r12 = 330 pm.

Accepted Answer

Question 16

If the following all crystallize in the same type of structure, which has the highest lattice energy?

Accepted Answer

A)  NaCl 
B)  NaF 
C)  KF 
D)  NaBr 
E)  NaI 
A)  NaCl 
B)  NaF 
C)  KF 
D)  NaBr 
E)  NaI

Question 17

When two atoms are brought together along the x-axis, what is the number of $\sigma$ bonds that can be formed by overlap of p-orbitals on each atom?

Accepted Answer

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

Question 18

How many $\sigma$- and $\pi$-bonds, respectively,Are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Accepted Answer

A)  14 and 3 
B)  15 and 3 
C)  14 and 2 
D)  8 and 3 
E)  11 and 3 
A)  14 and 3 
B)  15 and 3 
C)  14 and 2 
D)  8 and 3 
E)  11 and 3

Question 19

Which of the following is paramagnetic?

Accepted Answer

A)  N2  
B)  B2  
C)  O2- 
D)  C22- 
E)  B22- 
A)  N2  
B)  B2  
C)  O2- 
D)  C22- 
E)  B22-

Question 20

List the chalcogens in order of increasing electronegativity.

Accepted Answer

tellurium

Which of the following has resonance structures?

Which of the following statements is true?

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide, H₂NC(O)NNC(O)NH₂?

What is the shape of the molecule AX₄E₂?

Which of the following has the highest lattice energy?

Why is the bond dissociation energy of C-C greater than that of C-H?

Both C₂ and C₂^2- are diamagnetic.

For HF, the LCAO-MO, $\Psi$ =c_H $\Psi$ _H +c_F $\Psi$ _F,has c_H = c_F.

Write three Lewis structures for the cyanate ion, NCO^-,Where the arrangement of atoms is N-C-O.In the most plausible structure,

Estimate the CN bond length in urea, NH₂CONH₂.Given: covalent radii (pm)Of C-,77; C=,67; N-,75; N=,60;O-,74; O=,60; H,37.

The Madelung constant is different for all crystals.

Match each of the following compounds with its lattice energy. $\text { KI, LiF, } \mathrm { MgF } _ { 2 } \text {, LiI } \quad 2961,1046,759,645 \mathrm {~kJ} / \mathrm { mol }$

What is the shape of SO₃²^-?

All the following are polar except

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of rubidium chloride ion-pairs, that is,the energy change for the following reaction: Rb⁺(g)+Cl^-(g) $\rightarrow$ Rb⁺Cl^-(g) Use r₁₂ = 330 pm.

If the following all crystallize in the same type of structure, which has the highest lattice energy?

When two atoms are brought together along the x-axis, what is the number of $\sigma$ bonds that can be formed by overlap of p-orbitals on each atom?

How many $\sigma$ - and $\pi$ -bonds, respectively,Are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?

Which of the following is paramagnetic?

List the chalcogens in order of increasing electronegativity.

Atoms

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

Exam 2: Molecules

Which of the following has resonance structures?

Which of the following statements is true?

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide, H2NC(O)NNC(O)NH2?

What is the shape of the molecule AX4E2?

Which of the following has the highest lattice energy?

Why is the bond dissociation energy of C-C greater than that of C-H?

Both C2 and C22- are diamagnetic.

For HF, the LCAO-MO, Ψ\Psi Ψ =cH Ψ\Psi Ψ H +cF Ψ\Psi Ψ F,has cH = cF.

Write three Lewis structures for the cyanate ion, NCO-,Where the arrangement of atoms is N-C-O.In the most plausible structure,

Estimate the CN bond length in urea, NH2CONH2.Given: covalent radii (pm)Of C-,77; C=,67; N-,75; N=,60;O-,74; O=,60; H,37.

The Madelung constant is different for all crystals.

Match each of the following compounds with its lattice energy. KI, LiF, MgF2, LiI 2961,1046,759,645 kJ/mol\text { KI, LiF, } \mathrm { MgF } _ { 2 } \text {, LiI } \quad 2961,1046,759,645 \mathrm {~kJ} / \mathrm { mol } KI, LiF, MgF2​, LiI 2961,1046,759,645 kJ/mol

What is the shape of SO32-?

All the following are polar except

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of rubidium chloride ion-pairs, that is,the energy change for the following reaction: Rb+(g)+Cl-(g) →\rightarrow→ Rb+Cl-(g) Use r12 = 330 pm.

If the following all crystallize in the same type of structure, which has the highest lattice energy?

When two atoms are brought together along the x-axis, what is the number of σ\sigmaσ bonds that can be formed by overlap of p-orbitals on each atom?

How many σ\sigmaσ - and π\piπ -bonds, respectively,Are there in the Lewis structure of azidocarbonamide,H2NC(O)NNC(O)NH2?

Which of the following is paramagnetic?

List the chalcogens in order of increasing electronegativity.

Atoms

States of Matter

Thermodynamics

Equilibrium

Reactions

Kinetics

The Main-Group Elements

The D-Block Elements

Nuclear Chemistry

Organic Chemistry

Filters

How many lone pairs of electrons are there in the Lewis structure of azidocarbonamide, H₂NC(O)NNC(O)NH₂?

What is the shape of the molecule AX₄E₂?

Both C₂ and C₂^2- are diamagnetic.

For HF, the LCAO-MO, $\Psi$ =c_H $\Psi$ _H +c_F $\Psi$ _F,has c_H = c_F.

Write three Lewis structures for the cyanate ion, NCO^-,Where the arrangement of atoms is N-C-O.In the most plausible structure,

Estimate the CN bond length in urea, NH₂CONH₂.Given: covalent radii (pm)Of C-,77; C=,67; N-,75; N=,60;O-,74; O=,60; H,37.

Match each of the following compounds with its lattice energy. $\text { KI, LiF, } \mathrm { MgF } _ { 2 } \text {, LiI } \quad 2961,1046,759,645 \mathrm {~kJ} / \mathrm { mol }$

What is the shape of SO₃²^-?

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of rubidium chloride ion-pairs, that is,the energy change for the following reaction: Rb⁺(g)+Cl^-(g) $\rightarrow$ Rb⁺Cl^-(g) Use r₁₂ = 330 pm.

When two atoms are brought together along the x-axis, what is the number of $\sigma$ bonds that can be formed by overlap of p-orbitals on each atom?

How many $\sigma$ - and $\pi$ -bonds, respectively,Are there in the Lewis structure of azidocarbonamide,H₂NC(O)NNC(O)NH₂?