Ch.9 - Chemical Bonding I: The Lewis Model

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Tro 4th Edition

Ch.9 - Chemical Bonding I: The Lewis Model

문제 55a

Determine if a bond between each pair of atoms would be pure covalent, polar covalent, or ionic. a. Br and Br

문제 56

Determine whether the bond between each of the following pairs of atoms would be pure covalent, polar covalent, or ionic: a. C and N b. N and S c. K and F d. N and N.

문제 57

Refer to Figure 9.10 to estimate the percent ionic character of the CO bond.

문제 58a

Draw the Lewis structure for BrF with an arrow representing the dipole moment. Refer to Figure 9.10 to estimate the percent ionic character of the BrF bond.

문제 58b

Refer to Figure 9.10 to estimate the percent ionic character of the BrF bond.

문제 59

Write the Lewis structure for each molecule or ion. a. CI₄ b. N₂O c. SiH₄ d. Cl₂CO

문제 60b

Write the Lewis structure for each molecule or ion. b. OH^-

문제 60c

Write the Lewis structure for each molecule or ion. c. BrO^-

문제 61a,b,c

Write the Lewis structure for each molecule or ion. a. N₂H₂ b. N₂H₄ c. C₂H₂

문제 61d

Write the Lewis structure for each molecule or ion. d. C₂H₄

문제 62a

Write the Lewis structure for each molecule or ion. a. H₃COCH₃

문제 63a

Write a Lewis structure that obeys the octet rule for each molecule or ion. Include resonance structures if necessary and assign formal charges to each atom. a. SeO₂

문제 63b,c,d

Write a Lewis structure that obeys the octet rule for each molecule or ion. Include resonance structures if necessary and assign formal charges to each atom. b. CO₃^2– c. ClO^– d. NO₂^–

문제 64

Write a Lewis structure that obeys the octet rule for each ion. Include resonance structures if necessary and assign formal charges to each atom. a. ClO₃^- b. ClO₄^- c. NO₃^- d. NH₄⁺

문제 66

Use formal charges to identify the better Lewis structure.

문제 67

How important is the resonance structure shown here to the overall structure of carbon dioxide? Explain.

문제 68

In N₂O, nitrogen is the central atom and the oxygen atom is terminal. In OF₂, however, oxygen is the central atom. Use formal charges to explain why.

문제 69

Draw the Lewis structure (including resonance structures) for the acetate ion (CH₃COO^-). For each resonance structure, assign formal charges to all atoms that have formal charge.

문제 70

Draw the Lewis structure (including resonance structures) for methyl azide (CH₃N₃). For each resonance structure, assign formal charges to all atoms that have formal charge.

문제 71

What are the formal charges of the atoms shown in red?

문제 72

What are the formal charges of the atoms shown in red?

문제 73b

Write the Lewis structure for each molecule (octet rule not followed). b. NO₂

문제 74

Write the Lewis structure for each molecule (octet rule not followed). a. BBr₃ b. NO c. ClO₂

문제 75

Write the Lewis structure for each ion. Include resonance structures if necessary and assign formal charges to all atoms. If necessary, expand the octet on the central atom to lower formal charge for the following ions: a. PO4^3- b. CN^- c. SO3^2- d. ClO2^-.

문제 76

Write Lewis structures for each molecule or ion. Include resonance structures if necessary and assign formal charges to all atoms. If you need to, expand the octet on the central atom to lower formal charge. a. SO4^2- b. HSO4^- c. SO3 d. BrO2^-

문제 77a

Write Lewis structures for each molecule or ion. Use expanded octets as necessary. a. PF₅

문제 78b

Write Lewis structures for each molecule or ion. Use expanded octets as necessary. b. AsF₆^-

문제 79a

Order these compounds in order of increasing carbon–carbon bond strength: HCCH, H₂CCH₂, H₃CCH₃.

문제 79b

Order these compounds in order of decreasing carbon–carbon bond length: HCCH, H₂CCH₂, H₃CCH₃.

문제 80

Which of the two compounds, H₂NNH₂ and HNNH, has the strongest nitrogen-nitrogen bond, and which has the shorter nitrogen-nitrogen bond.