Question 1

Give the formal charge on the phosphorus atom in this structure. (Phosphorus is in group 5A directly under nitrogen in the periodic table.)

Accepted Answer

The answer of Give the formal charge on the phosphorus...

Question 2

Assume that the structure of BF3 (boron trifluoride, or trifluoroborane) is correctly predicted by the VSEPR rules.
1. What is the predicted structure? (Show all unpaired valence electrons.)
2. The B-F bond is exceptionally strong. This suggests that it has some double-bond character. Draw resonance structures for BF3 that show that the three B-F bonds share some double-bond character. Be sure to show formal charges and all unshared electrons.
3. What is the polarity of the B-F bond? (In which direction is the bond dipole?) How do you know?

Accepted Answer

1. Boron trifluoride consists of a centr

Question 3

Consider this compound:
   1. Of the labeled bonds, the longest bond is ________________.
2. The most polar bond is ________________.
3. The bonding geometry at the silicon atoms is ________________.
4. The hybridization of the silicon atoms is ________________.

Accepted Answer

1. b
2. c

Question 4

What is the C-N-O bond angle in the cyanate ion?

Accepted Answer

The answer of What is the C-N-O bond angle in...

Question 5

Which atomic orbital has two nodes?

Accepted Answer

A)  2p 
B)  3p 
C)  4s 
D)  1s 
E)  none of these 
A)  2p 
B)  3p 
C)  4s 
D)  1s 
E)  none of these

Question 6

Consider this structure:
 $$\mathrm { H } _ { 3 } \mathrm { C } \stackrel { a } { - } \mathrm { C } \stackrel { b } { \equiv } \mathrm { C } \stackrel { c } { - } \mathrm { CH } \stackrel { d } { = } \mathrm { CH } \stackrel { e } { - } \mathrm { CH } _ { 2 } \stackrel { f } { - } \mathrm { CH } _ { 3 }$$ Which bond represents an sp-sp2 carbon-carbon bond?

Accepted Answer

Give the formal charge on the phosphorus atom in this structure. (Phosphorus is in group 5A directly under nitrogen in the periodic table.)

Consider this compound: 1. Of the labeled bonds, the longest bond is . 2. The most polar bond is . 3. The bonding geometry at the silicon atoms is . 4. The hybridization of the silicon atoms is .

What is the C-N-O bond angle in the cyanate ion?

Which atomic orbital has two nodes?

Alkanes and Organic Nomenclature

The Curved-Arrow Notation, Resonance, Acids and Bases, and Chemical Equilibrium

Introduction to Alkenes and Alkynes

Addition Reactions of Alkenes and Alkynes

Principles of Stereochemistry

Cyclic Compounds and Reaction Stereochemistry

Nomenclature and Noncovalent Intermolecular Interactions

The Chemistry of Alkyl Halides

Free-Radical Reactions, Main-Group Organometallic Compounds, and Carbenes

The Chemistry of Alcohols and Thiols

The Chemistry of Ethers, Epoxides, Glycols, and Sulfides

Introduction to Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Dienes and Aromaticity

The Chemistry of Benzene and Its Derivatives

Allylic and Benzylic Reactivity

The Chemistry of Aryl Halides, Vinylic Halides, and Phenols

The Chemistry of Aldehydes and Ketones

The Chemistry of Carboxylic Acids

The Chemistry of Carboxylic Acid Derivatives

The Chemistry of Enolate Ions, Enols, and Α,β-Unsaturated Carbonyl Compounds

The Chemistry of Amines

Carbohydrates

The Chemistry of Thioesters, Phosphate Esters, and Phosphate Anhydrides

The Chemistry of the Aromatic Heterocycles and Nucleic Acids

Amino Acids, Peptides, and Proteins

Pericyclic Reactions

Filters

Exam 1: Chemical Bonding and Chemical Structure

Give the formal charge on the phosphorus atom in this structure. (Phosphorus is in group 5A directly under nitrogen in the periodic table.)

Consider this compound: 1. Of the labeled bonds, the longest bond is ________________. 2. The most polar bond is ________________. 3. The bonding geometry at the silicon atoms is ________________. 4. The hybridization of the silicon atoms is ________________.

What is the C-N-O bond angle in the cyanate ion?

Which atomic orbital has two nodes?

Alkanes and Organic Nomenclature

The Curved-Arrow Notation, Resonance, Acids and Bases, and Chemical Equilibrium

Introduction to Alkenes and Alkynes

Addition Reactions of Alkenes and Alkynes

Principles of Stereochemistry

Cyclic Compounds and Reaction Stereochemistry

Nomenclature and Noncovalent Intermolecular Interactions

The Chemistry of Alkyl Halides

Free-Radical Reactions, Main-Group Organometallic Compounds, and Carbenes

The Chemistry of Alcohols and Thiols

The Chemistry of Ethers, Epoxides, Glycols, and Sulfides

Introduction to Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Dienes and Aromaticity

The Chemistry of Benzene and Its Derivatives

Allylic and Benzylic Reactivity

The Chemistry of Aryl Halides, Vinylic Halides, and Phenols

The Chemistry of Aldehydes and Ketones

The Chemistry of Carboxylic Acids

The Chemistry of Carboxylic Acid Derivatives

The Chemistry of Enolate Ions, Enols, and Α,β-Unsaturated Carbonyl Compounds

The Chemistry of Amines

Carbohydrates

The Chemistry of Thioesters, Phosphate Esters, and Phosphate Anhydrides

The Chemistry of the Aromatic Heterocycles and Nucleic Acids

Amino Acids, Peptides, and Proteins

Pericyclic Reactions

Filters

Consider this compound: 1. Of the labeled bonds, the longest bond is . 2. The most polar bond is . 3. The bonding geometry at the silicon atoms is . 4. The hybridization of the silicon atoms is .