Chemistry: Structure and Properties, Books a la Carte PACKAGE W/MasteringChemistry, 2nd Edition
2nd Edition
ISBN: 9780134777559
Author: Tro, Nivaldo J.
Publisher: PEARSON
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Textbook Question
Chapter 6, Problem 75E
Consider the bond energies of three iodine halides:
How might you use valence bond theory to help explain this trend?
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5.
Consider the reaction between hydrazine and hydrogen to produce ammonia, N2H4(g)+H2(g)→2NH3(g)N2H4(g)+H2(g)→2NH3(g). Use enthalpies of formation and bond enthalpies to estimate the enthalpy of the nitrogen-nitrogen bond in N2H4N2H4. (Hint: In an N2H4N2H4 molecule, each NN atom has single bonds to the adjacent NN atom and two HH atoms. In an NH3NH3 molecule, the central NN atom has single bonds to three HH atoms.)
Consider the following ion: BrO3¯.
a) Show the full electron configuration for Br.
b) Draw the most correct Lewis structure for BrO3¯ and briefly explain why your Lewis
structure is correct.
c) If the structure is stabilised by resonance, draw at least one of the possible resonance
forms. If it is not stabilised by resonance, briefly explain why.
d) What is the electronic geometry of BrO3-? What is its molecular shape?
e) Does BrO3 have a dipole moment? Briefly justify your answer.
f)
On average, would you expect IO3¯ to have longer or shorter bonds than BrO3¯?
Briefly explain your answer.
g) Which of the following molecules would you expect to have the lowest vapour
pressure? Briefly explain your choice.
Br
HO
HO.
Br-
Compound A
Compound B
Compound C
h) What is the molecular formula for Compound C? What is the empirical formula for
Compound C?
Why double bonds and lone pairs cause deviations from ideal bond angles
Chapter 6 Solutions
Chemistry: Structure and Properties, Books a la Carte PACKAGE W/MasteringChemistry, 2nd Edition
Ch. 6 - Prob. 1ECh. 6 - What is a chemical bond according to valence bond...Ch. 6 - In valence bond theory, what determines the...Ch. 6 - In valence bond theory, the interaction energy...Ch. 6 - What is hybridization? Why is hybridization...Ch. 6 - How does hybridization of the atomic orbitals in...Ch. 6 - How is the number of hybrid orbitals related to...Ch. 6 - Sketch each hybrid orbital sp sp2 sp3 sp3d sp3d2Ch. 6 - Prob. 9ECh. 6 - Name the hybridization scheme that corresponds to...
Ch. 6 - What is a chemical bond according to molecular...Ch. 6 - Explain the difference between hybrid atomic...Ch. 6 - What is a bonding molecular orbital?Ch. 6 - Prob. 14ECh. 6 - What is the role of wave interference in...Ch. 6 - Prob. 16ECh. 6 - Prob. 17ECh. 6 - Prob. 18ECh. 6 - Prob. 19ECh. 6 - Prob. 20ECh. 6 - Prob. 21ECh. 6 - When applying molecular orbital theory to...Ch. 6 - In molecular orbital theory, what is a nonbonding...Ch. 6 - Write a short paragraph describing chemical...Ch. 6 - The valence electron configurations of several...Ch. 6 - The valence electron configurations of several...Ch. 6 - Draw orbital diagrams (boxes with arrows in them)...Ch. 6 - Draw orbital diagrams (boxes with arrows in them)...Ch. 6 - Prob. 29ECh. 6 - Draw orbital diagrams (boxes with arrows in them)...Ch. 6 - Which hybridization scheme allows the formation of...Ch. 6 - Which hybridization scheme allows the central atom...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Write a hybridization and bonding scheme for each...Ch. 6 - Consider the structure of the amino acid alanine...Ch. 6 - Consider the structure of the amino acid aspartic...Ch. 6 - Sketch the bonding molecular orbital that results...Ch. 6 - Sketch the antibonding molecular orbital that...Ch. 6 - Draw an MO energy diagram and predict the bond...Ch. 6 - Draw an MO energy diagram and predict the bond...Ch. 6 - Sketch the bonding and antibonding molecular...Ch. 6 - Sketch the bonding and antibonding molecular...Ch. 6 - Using the molecular orbital energy ordenng for...Ch. 6 - Using the molecular orbital energy ordering for...Ch. 6 - Apply molecular orbital theory to predict if each...Ch. 6 - Apply molecular orbital theory to predict if each...Ch. 6 - According to MO theory, which molecule or ion has...Ch. 6 - According to MO theory, which molecule or ion has...Ch. 6 - Draw an MO energy diagram for CO. (Use the energy...Ch. 6 - Draw an MO energy diagram for HCI. Predict the...Ch. 6 - For each compound, draw the Lewis structure,...Ch. 6 - For each compound, draw the Lewis structure,...Ch. 6 - Amino acids are biological compounds that link...Ch. 6 - The genetic code is based on four different bases...Ch. 6 - The structure of caffeine, present in coffee and...Ch. 6 - The structure of acetylsalicylic acid (aspirin) is...Ch. 6 - Draw a molecular orbital energy diagram for CIF....Ch. 6 - Draw Lewis structures and MO diagrams for CN+, CN,...Ch. 6 - Bromine can form compounds or ions with any number...Ch. 6 - The compound C3H4 has two double bonds. Describe...Ch. 6 - How many hybrid orbitals do we use to describe...Ch. 6 - Prob. 66ECh. 6 - In VSEPR theory, which uses the Lewis model to...Ch. 6 - The resuts of a molecular orbital calculation for...Ch. 6 - Prob. 69ECh. 6 - cis-2-Butene isomerizes (changes its structure) to...Ch. 6 - The ion CH5 + can form under very special...Ch. 6 - Neither the VSEPR model nor the hybridization...Ch. 6 - Prob. 73ECh. 6 - The most stable forms of the nonmetals in groups...Ch. 6 - Consider the bond energies of three iodine...Ch. 6 - How many atomic orbitals form a set of sp3hybrid...Ch. 6 - Have each group member pick one of these...Ch. 6 - Divide your group into two subgroups. Have one...Ch. 6 - A molecular orbital calculation for Hi results in...Ch. 6 - Determine the hybridization about 0 in CH3OH.Ch. 6 - Determine the hybridization about C in H2CO.Ch. 6 - According to the valance bond theory, which kind...Ch. 6 - Use molecular orbital theory to determine the bond...Ch. 6 - Use molecular orbital theory to predict which...Ch. 6 - Use molecular orbital theory to determine which...Ch. 6 - Which hybridization scheme occurs about nitrogen...Ch. 6 - Prob. 8SAQCh. 6 - Prob. 9SAQCh. 6 - Prob. 10SAQCh. 6 - Which type of orbitals overlap to form the sigma...
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- What are the angles a and b in the actual molecule of which this is a Lewis structure? H H H C H a a = C b = ⁰ C H Note for advanced students: give the ideal angles, and don't worry about small differences from the ideal that might be caused by the fact that different electron groups may have slightly different sizes. H Xarrow_forward10. Methanol is an important industrial solvent. To produce methanol, carbon monoxide and hydrogen gas are reacted together:(assume that CO has a triple bond): CO(g) + 2 H₂(g) → CH3OH(1) Use bond energies to estimate the enthalpy of this reaction. Bond O-H 0-0 0=0 C-C C=C C-O C=O C=0 C-H C-Cl C-F H-CL H-F F-F H-H A. 266 kmol B. -45 kJ/mol C. -12 J/mol D. 400 /mol Average bond energy (kJ/mol) 467 146 495 347 614 358 745 1072 413 339 485 427 565 154 432arrow_forward10. Each ball-and-stick model below shows the electron-pair and molecular geometry of a generic molecule. Explain what is wrong with each molecular geometry and provide the correct molecular geometry based on the number of lone and bonding pairs around the central atom. (a) (b) (c) 11. Draw the Lewis structure for acetamide (CH3CONH2) and determine the geometry about each interior atom. Experiments show that the geometry about the N atom in acetamide is nearly planar. Draw a resonance structure that can account for the planar geometry about the N atom.arrow_forward
- Consider the two molecules BrO2- and Br2O. They both have Br as the central atom. Which do you think is most stable based on resonance structures? Which has the smaller angle?arrow_forwardUse VSEPR theory to predict the geometry (including bond angles) about each interior atom of methyl azide (CH3N3), and make a sketch of the molecule. Would you expect the bond angle between the two interior nitrogen atoms to be the same or different? Would you expect the two nitrogen–nitrogen bond lengths to be the same or different?arrow_forwardUse VSEPR to predict the geometry (including bond angles) about each interior atom of methyl azide (CH3N3) and draw the molecule. Would you expect the bond angle between the two interior nitrogen atoms to be the same or different? Would you expect the two nitrogen–nitrogen bond lengths to be the same or different?arrow_forward
- What is the molecular geometry of ClF3? Label all bond angles in the structure.arrow_forwardPredicting deviations from ideal bond angles Consider the nitrogen trifluoride (NF3) molecule. What is the central atom? Enter its chemical symbol. How many lone pairs are around the central atom? What is the ideal angle between the nitrogen-fluorine bonds? Compared to the ideal angle, you would expect the actual angle between the nitrogen-fluorine bonds to be ... 0 口。 (choose one) (choose one) about the same bigger smallerarrow_forwardDraw the Lewis structure for acetamide (CH3CONH2), an organic compound, and determine the geometry about each interior atom. Experiments show that the geometry about the nitrogen atom in acetamide is nearly planar. What resonance structure can account for the planar geometry about the nitrogen atom?arrow_forward
- The element vibranium (Vb) reacts with pandemonium (Pn) to generate a covalent PnVb4 molecule. If a pandemonium atom has 8 valence electrons and each vibranium atom has 7 valence electrons, draw the Lewis structure of PbVb4. What is the molecular geometry of the PbVb4 molecule? Pn is the central atom.arrow_forwardBest Lewis Formula and Molecular Geometry A student writes the Lewis electron-dot formula for the carbonate anion, CO32, as a Does this Lewis formula obey the octet rule? Explain. What are the formal charges on the atoms? Try describing the bonding for this formula in valence bond terms. Do you have any difficulty doing this? b Does this Lewis formula give a reasonable description of the electron structure, or is there a better one? If there is a better Lewis formula, write it down and explain why it is better. c The same student writes the following resonance description for CO2: Is there something wrong with this description? (What would you predict as the geometries of these formulas?) d Is one or the other formula a better description? Could a value for the dipole moment help you decide? e Can you write a Lewis formula that gives an even better description of CO2? Explain your answer.arrow_forwardBond Enthalpy When atoms of the hypothetical element X are placed together, they rapidly undergo reaction to form the X2 molecule: X(g)+X(g)X2(g) a Would you predict that this reaction is exothermic or endothermic? Explain. b Is the bond enthalpy of X2 a positive or a negative quantity? Why? c Suppose H for the reaction is 500 kJ/mol. Estimate the bond enthalpy of the X2 molecule. d Another hypothetical molecular compound, Y2(g), has a bond enthalpy of 750 kJ/mol, and the molecular compound XY(g) has a bond enthalpy of 1500 kJ/mol. Using bond enthalpy information, calculate H for the following reaction. X2(g)+Y2(g)2XY(g) e Given the following information, as well as the information previously presented, predict whether or not the hypothetical ionic compound AX is likely to form. In this compound, A forms the A+ cation, and X forms the X anion. Be sure to justify your answer. Reaction: A(g)+12X2(g)AX(s)The first ionization energy of A(g) is 400 kJ/mol. The electron affinity of X(g) is 525 kJ/mol. The lattice energy of AX(s) is 100 kJ/mol. f If you predicted that no ionic compound would form from the reaction in Part e, what minimum amount of AX(s) lattice energy might lead to compound formation?arrow_forward
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