Question 1

There are eight valence in a methyl anion, CH₃^-.

Accepted Answer

A methyl anion (CH₃⁻) has 8 valence electrons: 3 from hydrogen, 4 from carbon, and 1 extra electron due to the negative charge.

Question 2

The percent s character in an sp² hybridized orbital is approximately 33%.

Accepted Answer

This is because the sp orbital contributes 1 out of the 3 orbitals in the hybridization, and the s orbital contributes 1 out of the 2 orbitals in the unhybridized state. Therefore, the s character is approximately 1/3 or 33%.

Question 3

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 4

Different compounds with the same molecular formula are called __________.

Accepted Answer

The answer of Different compounds with the same molecular formula...

Question 5

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC$\equiv$CH). Label each bond (e.g., C-H $\sigma$bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 6

The following molecule is classified as a __________amine.

Accepted Answer

The answer of The following molecule is classified as a...

Question 7

The curved arrows in the resonance structure for the acetate ion shown below  indicate the following alternative resonance structure for the acetate ion.

Accepted Answer

The curved arrows indicate the movement of electrons in the resonance structure. The alternative resonance structure shown is a valid structure for the acetate ion where the negative charge is located on the oxygen atom, instead of the carbon atom. Therefore, the statement is true.

Question 8

The following molecule contains an _____________functional group.

Accepted Answer

The answer of The following molecule contains an _____________functional group....

Question 9

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Question 10

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

Accepted Answer

The answer of Draw bond-line structures of all of the...

Question 11

The most electronegative elements in the periodic table are generally found toward the right in a horizontal row and toward the top in a column.

Accepted Answer

This statement is true. Electronegativity generally increases from left to right across a period and from bottom to top within a group in the periodic table.

Question 12

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Accepted Answer

The answer of The formal charges in the complex should...

Question 13

In drawing the Lewis structure for an organic compound, the carbon atoms should always be shown with eight total electrons.

Accepted Answer

In a Lewis structure, carbon atoms follow the octet rule, meaning they should be shown with eight total electrons to reflect their typical bonding behavior, forming four bonds to achieve a stable electron configuration.

Question 14

Consider the structure of urea given below.  To complete the Lewis structure, six nonbonding electrons should be added, two to each of the nitrogen atoms and two to the oxygen atom.

Accepted Answer

The answer of Consider the structure of urea given below....

Question 15

The maximum number of electrons that a molecular orbital can contain is four.

Accepted Answer

The maximum number of electrons that a molecular orbital can contain is two, with opposite spins.

Question 16

The following molecules all contain the same functional group except 2. CH₃OH CH₃OCH₃ CH₃CH₂OH CH₃CH(OH)CH₃ 1 2 3 4

Accepted Answer

The molecules listed appear to be in a chemical notation that isn't standard, but based on the context of the question, it's implied that three of them share a common functional group, while one does not. Given the variations in the structures as hinted by the text, it's reasonable to deduce that one of these molecules indeed has a different functional group than the others.

Question 17

The formal charge on carbon in carbon monoxide is______.

Accepted Answer

The answer of The formal charge on carbon in carbon...

Question 18

The approximate H-C-H bond angle in methane is ______°.

Accepted Answer

The answer of The approximate H-C-H bond angle in methane...

Question 19

The following species forms during an organic reaction.  The formal charge on the carbon atom indicated by the arrow is +1.

Accepted Answer

The answer of The following species forms during an organic...

Question 20

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Accepted Answer

The answer of Provide a neatly drawn figure to show...

Quiz 1: Covalent Bonding and Shapes of Molecules

There are eight valence in a methyl anion, CH₃^-.

The percent s character in an sp² hybridized orbital is approximately 33%.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Different compounds with the same molecular formula are called __________.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC $\equiv$ CH). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

The following molecule is classified as a __________amine.

The curved arrows in the resonance structure for the acetate ion shown below indicate the following alternative resonance structure for the acetate ion.

The following molecule contains an _____________functional group.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

The most electronegative elements in the periodic table are generally found toward the right in a horizontal row and toward the top in a column.

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

In drawing the Lewis structure for an organic compound, the carbon atoms should always be shown with eight total electrons.

Consider the structure of urea given below. To complete the Lewis structure, six nonbonding electrons should be added, two to each of the nitrogen atoms and two to the oxygen atom.

The maximum number of electrons that a molecular orbital can contain is four.

The following molecules all contain the same functional group except 2. CH₃OH CH₃OCH₃ CH₃CH₂OH CH₃CH(OH)CH₃ 1 2 3 4

The formal charge on carbon in carbon monoxide is______.

The approximate H-C-H bond angle in methane is ______°.

The following species forms during an organic reaction. The formal charge on the carbon atom indicated by the arrow is +1.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Quiz 1: Covalent Bonding and Shapes of Molecules

There are eight valence in a methyl anion, CH3-.

The percent s character in an sp2 hybridized orbital is approximately 33%.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH3) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Different compounds with the same molecular formula are called __________.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC ≡\equiv≡ CH). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

The following molecule is classified as a __________amine.

The curved arrows in the resonance structure for the acetate ion shown below indicate the following alternative resonance structure for the acetate ion.

The following molecule contains an _____________functional group.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H2O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Draw bond-line structures of all of the alkanes that have the formula C5H12.

The most electronegative elements in the periodic table are generally found toward the right in a horizontal row and toward the top in a column.

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

In drawing the Lewis structure for an organic compound, the carbon atoms should always be shown with eight total electrons.

Consider the structure of urea given below. To complete the Lewis structure, six nonbonding electrons should be added, two to each of the nitrogen atoms and two to the oxygen atom.

The maximum number of electrons that a molecular orbital can contain is four.

The following molecules all contain the same functional group except 2. CH3OH CH3OCH3 CH3CH2OH CH3CH(OH)CH3 1 2 3 4

The formal charge on carbon in carbon monoxide is______.

The approximate H-C-H bond angle in methane is ______°.

The following species forms during an organic reaction. The formal charge on the carbon atom indicated by the arrow is +1.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

There are eight valence in a methyl anion, CH₃^-.

The percent s character in an sp² hybridized orbital is approximately 33%.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ammonia (NH₃) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC $\equiv$ CH). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in water (H₂O) and which contain the lone pair of electrons. Label each orbital with its hybridization.

Draw bond-line structures of all of the alkanes that have the formula C₅H₁₂.

The following molecules all contain the same functional group except 2. CH₃OH CH₃OCH₃ CH₃CH₂OH CH₃CH(OH)CH₃ 1 2 3 4

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).