Chemistry: An Atoms-Focused Approach (Second Edition)
2nd Edition
ISBN: 9780393614053
Author: Thomas R. Gilbert, Rein V. Kirss, Stacey Lowery Bretz, Natalie Foster
Publisher: W. W. Norton & Company
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What are the angles a and b in the actual molecule of which this is a Lewis structure?
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b=0°
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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.
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3
What are the angles a and b in the actual molecule of which this is a Lewis structure?
a
H
0 c=N:
b
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.
a =
b = ]
Draw 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. Which resonance structure can account for the planar geometry about the nitrogen atom?
Chapter 5 Solutions
Chemistry: An Atoms-Focused Approach (Second Edition)
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- Best 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_forwardWhich of these molecules have an odd number of valence electrons: NO2, SCl2, NH3, NO3?arrow_forwardIn each of the following molecules, a central atom is surrounded by a total of three atoms or unshared electron pairs: SnCl2, BCl3, SO2. In which of these molecules would you expect the bond angle to be less than 120? Explain your reasoning.arrow_forward
- It is possible to write a simple Lewis structure for the SO42- ion, involving only single bonds, which follows the octet rule. However, Linus Pauling and others have suggested an alternative structure, involving double bonds, in which the sulfur atom is surrounded by six electron pairs. (a) Draw the two Lewis structures. (b) What geometries are predicted for the two structures? (c) What is the hybridization of sulfur in each case? (d) What are the formal charges of the atoms in the two structures?arrow_forward1) Why is it important to understand the molecular geometry or shape of molecules and ions in chemistry? H2Se CCl4 CH2Cl2 HCN NH3Cl+ NH2- CH3COCH3 CH3COOH 2) Among the eight molecules and ions studied in this experiment, (a) which molecule(s) or ion(s) are polar, and which ones are non-polar? (b) What is the difference between polar and non-polar molecules or ions? (c) What two factors dictate the polarity of the molecule or ion?arrow_forwardWhat are the angles a and b in the actual molecule of which this is a Lewis structure? H - N a a = 0⁰ b=0° b C÷N 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. X Garrow_forward
- What are the angles a and b in the actual molecule of which this is a Lewis structure? H H H a HL C H H 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. = [] b = ⁰ a = Xarrow_forwardWhat are the angles a and b in the actual molecule of which this is a Lewis structure? a fot H a = b C b 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. EN: X Sarrow_forwardElectrons in bonds are negatively charged and therefore repel each other. If you had a molecule of formula AB 2 , with A being the central atom, what would you predict the 3D shape to be to allow maximum distance between the two B atoms bonded to A? Linear shape, with a B atom on each side of A and a bond angle of 80 degrees A bent or V shape, with a B - A - B bond angle less than 180°arrow_forward
- Carbonate, CO32−, is a common polyatomic ion found in various materials from eggshells to antacids. What are the electron-pair geometry and molecular structure of this polyatomic ion?arrow_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_forwardThere are two molecules with the formula C2H6O. Draw electron-dot structures for both. (The connection of atoms is different in the two structures.)arrow_forward
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