Question 1

How many resonance structures can be drawn for N2O?

Accepted Answer

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

Question 2

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 3

Which of the following is a radical?

Accepted Answer

A) BrO 
B) CH3+ 
C) CH3- 
D) BF4- 
A) BrO 
B) CH3+ 
C) CH3- 
D) BF4-

Question 4

Which of the following statements is true?

Accepted Answer

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

Question 5

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 6

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of sodium chloride ion-pairs,that is,the energy change for the following reaction:
Na+(g)+ Cl-(g)$\rightarrow$Na+Cl-(g)
Use r12 = 283 pm.

Accepted Answer

-491 kJ.mo

Question 7

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

Accepted Answer

A) CaO 
B) BaS 
C) SrO 
D) SrS 
E) BaO 
A) CaO 
B) BaS 
C) SrO 
D) SrS 
E) BaO

Question 8

An element E has the electronic configuration 1s22s22p4.What is the formula of its compound with lithium?

Accepted Answer

A) LiE2 
B) LiE 
C) Li2E 
D) Li4E 
A) LiE2 
B) LiE 
C) Li2E 
D) Li4E

Question 9

What is wrong with the following Lewis structure?

Accepted Answer

A) The valence electron count 
B) The positioning of the carbon atom 
C) The distribution of valence electrons 
D) The charge on the carbon atom 
E) The dipole of the molecule 
A) The valence electron count 
B) The positioning of the carbon atom 
C) The distribution of valence electrons 
D) The charge on the carbon atom 
E) The dipole of the molecule

Question 10

Predict the electronic configuration in the oxide ion in CaO.

Accepted Answer

A) [He]2s22p6 or [Ne] 
B) [He]2s22p5 
C) [He]2s22p63s2 
D) [Ne]3s13p3  
E) [Ne]3s23p3  
A) [He]2s22p6 or [Ne] 
B) [He]2s22p5 
C) [He]2s22p63s2 
D) [Ne]3s13p3  
E) [Ne]3s23p3

Question 11

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 12

Why are the N-O bond lengths in NO3- the same?

Accepted Answer

The explan

Question 13

Use the bond enthalpies given to estimate the heat released when 2-methyl-1-propene,(CH3)2C=CH2,reacts with HBr to give (CH3)2CBrCH3.Bond enthalpies (kJ.mol-1): C-H,412; C-C,348; C=C,612; C-Br,276; H-Br,366.

Accepted Answer

A) 58 kJ.mol-1 
B) 507 kJ.mol-1 
C) 317 kJ.mol-1 
D) 288 kJ.mol-1 
E) 181 kJ.mol-1 
A) 58 kJ.mol-1 
B) 507 kJ.mol-1 
C) 317 kJ.mol-1 
D) 288 kJ.mol-1 
E) 181 kJ.mol-1

Question 14

If 346 kJ.mol-1 is released in the reaction Na(g)+ Cl(g)$\rightarrow$ Na+Cl-(g),is the energy change for the reaction Na+Cl-(g)$\rightarrow$ NaCl(s)endothermic or exothermic?

Accepted Answer

The answer of If 346 kJ.mol-1 is released in the...

Question 15

Estimate the CO bond length in acetone,CH3COCH3.Given: covalent radii (pm)of C-,77; C=,67; O-,74; O=,60; H,37.

Accepted Answer

A) 75.5 pm 
B) 127 pm 
C) 63.5 pm 
D) 151 pm 
E) 137 pm 
A) 75.5 pm 
B) 127 pm 
C) 63.5 pm 
D) 151 pm 
E) 137 pm

Question 16

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 17

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

Accepted Answer

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

Question 18

An element,E,has the electronic configuration [Ne] 3s23p1.Write the formula of its compound with sulfate.

Accepted Answer

Question 19

For the ground-state ion Sn4+,what type of orbital do the electrons with highest energy reside in?

Accepted Answer

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

Question 20

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

How many resonance structures can be drawn for N₂O?

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.

Which of the following is a radical?

Which of the following statements is true?

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

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of sodium chloride ion-pairs,that is,the energy change for the following reaction: Na⁺(g)+ Cl^-(g) $\rightarrow$ Na⁺Cl^-(g) Use r₁₂ = 283 pm.

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

An element E has the electronic configuration 1s²2s²2p⁴.What is the formula of its compound with lithium?

What is wrong with the following Lewis structure?

Predict the electronic configuration in the oxide ion in CaO.

Which of the following has the highest lattice energy?

Why are the N-O bond lengths in NO₃^- the same?

Use the bond enthalpies given to estimate the heat released when 2-methyl-1-propene,(CH₃)₂C=CH₂,reacts with HBr to give (CH₃)₂CBrCH₃.Bond enthalpies (kJ.mol^-¹): C-H,412; C-C,348; C=C,612; C-Br,276; H-Br,366.

If 346 kJ.mol^-¹ is released in the reaction Na(g)+ Cl(g) $\rightarrow$ Na⁺Cl^-(g),is the energy change for the reaction Na⁺Cl^-(g) $\rightarrow$ NaCl(s)endothermic or exothermic?

Estimate the CO bond length in acetone,CH₃COCH₃.Given: covalent radii (pm)of C-,77; C=,67; O-,74; O=,60; H,37.

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

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

An element,E,has the electronic configuration [Ne] 3s²3p¹.Write the formula of its compound with sulfate.

For the ground-state ion Sn⁴⁺,what type of orbital do the electrons with highest energy reside in?

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

The Quantum World

Quantum Mechanics in Action: Atoms

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

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Exam 3: Chemical Bonds

How many resonance structures can be drawn for N2O?

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.

Which of the following is a radical?

Which of the following statements is true?

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

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of sodium chloride ion-pairs,that is,the energy change for the following reaction: Na+(g)+ Cl-(g) →\rightarrow→ Na+Cl-(g) Use r12 = 283 pm.

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

An element E has the electronic configuration 1s22s22p4.What is the formula of its compound with lithium?

What is wrong with the following Lewis structure?

Predict the electronic configuration in the oxide ion in CaO.

Which of the following has the highest lattice energy?

Why are the N-O bond lengths in NO3- the same?

Use the bond enthalpies given to estimate the heat released when 2-methyl-1-propene,(CH3)2C=CH2,reacts with HBr to give (CH3)2CBrCH3.Bond enthalpies (kJ.mol-1): C-H,412; C-C,348; C=C,612; C-Br,276; H-Br,366.

If 346 kJ.mol-1 is released in the reaction Na(g)+ Cl(g) →\rightarrow→ Na+Cl-(g),is the energy change for the reaction Na+Cl-(g) →\rightarrow→ NaCl(s)endothermic or exothermic?

Estimate the CO bond length in acetone,CH3COCH3.Given: covalent radii (pm)of C-,77; C=,67; O-,74; O=,60; H,37.

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

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

An element,E,has the electronic configuration [Ne] 3s23p1.Write the formula of its compound with sulfate.

For the ground-state ion Sn4+,what type of orbital do the electrons with highest energy reside in?

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

The Quantum World

Quantum Mechanics in Action: Atoms

Molecular Shape and Structure

The Properties of Gases

Liquids and Solids

Inorganic Materials

Thermodynamics: The First Law

Thermodynamics: The Second and Third Laws

Physical Equilibria

Chemical Equilibria

Acids and Bases

Aqueous Equilibria

Electrochemistry

Chemical Kinetics

The Elements: the Main Group Elements

The Elements: The D Block

Nuclear Chemistry

Organic Chemistry I

Organic Chemistry II

Filters

How many resonance structures can be drawn for N₂O?

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.

Use the expression for the Coulomb potential energy to calculate the energy for formation of 1 mole of sodium chloride ion-pairs,that is,the energy change for the following reaction: Na⁺(g)+ Cl^-(g) $\rightarrow$ Na⁺Cl^-(g) Use r₁₂ = 283 pm.

An element E has the electronic configuration 1s²2s²2p⁴.What is the formula of its compound with lithium?

Why are the N-O bond lengths in NO₃^- the same?

Use the bond enthalpies given to estimate the heat released when 2-methyl-1-propene,(CH₃)₂C=CH₂,reacts with HBr to give (CH₃)₂CBrCH₃.Bond enthalpies (kJ.mol^-¹): C-H,412; C-C,348; C=C,612; C-Br,276; H-Br,366.

If 346 kJ.mol^-¹ is released in the reaction Na(g)+ Cl(g) $\rightarrow$ Na⁺Cl^-(g),is the energy change for the reaction Na⁺Cl^-(g) $\rightarrow$ NaCl(s)endothermic or exothermic?

Estimate the CO bond length in acetone,CH₃COCH₃.Given: covalent radii (pm)of C-,77; C=,67; O-,74; O=,60; H,37.

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

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

An element,E,has the electronic configuration [Ne] 3s²3p¹.Write the formula of its compound with sulfate.

For the ground-state ion Sn⁴⁺,what type of orbital do the electrons with highest energy reside in?