Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 20Q
The three NO bonds in NO3− are all equivalent in length and strength. How is this explained even though any valid Lewis structure for NO3− has one double bond and two single bonds to nitrogen?
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Answer the questions in the table below about the shape of the phosphorus trifluoride (PF3) molecule.
How many electron groups are around the central phosphorus
atom?
Note: one "electron group" means one lone pair, one single bond,
one double bond, or one triple bond.
What phrase best describes the arrangement of these electron
groups around the central phosphorus atom?
(You may need to use the scrollbar to see all the choices.)
(choose one)
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Consider peroxynitrite (chemical formula: ONOO−), a structural isomer of the nitrate anion. It is generated in the cell when nitric oxide (NO) reacts with the superoxide radical anion (O2-.). Peroxynitrite is a potent oxidant and nitrating agent and can lead to DNA and protein damage (this is the complete question)
Draw the correct Lewis structure for peroxynitrite and indicate approximate bond angles.
Tell how many molecular degrees of freedom of motion are present in peroxynitrite and what motions they correspond to.
The bonds N=N, N=N and N-N have known measured values of bond energies and bond lengths
that can be found in various tables. What is the expected sequence of nitrogen-nitrogen bond
lengths and bond enthalpies?
O Bond lengths: N=N N=N > N-N.
Bond lengths: N=N N=N> N-N; Bond enthalpies: N=N N=N > N=N; Bond enthalpies: N=N N=N> N-N; Bond enthalpies: N=N > N=N > N-N.
Chapter 9 Solutions
Chemistry
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- In which of the following molecules does the sulfur have an expanded octet? For those that do, write the Lewis structure. (a) SO2 (b) SF4 (c) SO2Cl2 (d) SF6arrow_forwardWrite all resonance structures of chlorobenzene, C6H5Cl, a molecule with the same cyclic structure as benzene. In all structures, keep the CCl bond as a single bond. Which resonance structures are the most important?arrow_forwardWrite reasonable Lewis structures for the following species, none of which follow the octet rule. (a) BF3 (b) NO (c) CO+ (d) ClO3arrow_forward
- n your own words, what is meant by the term electronegativity? What are the trends across and down the periodic table for electronegativity? Explain them, and describe how they are consistent with trends of ionization energy and atomic radii.arrow_forwardWhat possible error(s) exist in the Lewis structure (assume we are trying to represent the best possible Lewis structure for the NO₂S ion knowing N is the central atom in this polyatomic ion)? [:ö==S: N= CO :O: The best structure would have double bond and two lone pairs on each oxygen atom and a single bond with three lone pairs on the sulfur. There are no errors. This is the best possible structure. The Lewis structure above does not minimize formal charges, thus is the not the best possible structure. The nitrogen atom has an expanded octet, and this structure is impossible. The Lewis structure contains the wrong number of electrons, thus this structure is impossible.arrow_forwardSulfuric acid is the industrial chemical produced in greatest quantity worldwide. About 90 billion pounds are produced each year in the United States alone. Write the Lewis structure for sulfuric acid, H2SO4, which has twooxygen atoms and two OH groups bonded to the sulfur.arrow_forward
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