VSEPR structures are based on analysis of Lewis structures.Select one:a. TRUE only part of the timeb. FALSEC. TRUEWhat is the electron group geometry around the S atom?Select one:a. Octahedralb. Trigonal planarc. Trigonal bipyramidald. Tetrahedrale. Linear

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World of Chemistry, 3rd edition

3rd Edition

ISBN:9781133109655

Author:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan L. Zumdahl, Donald J. DeCoste

Chapter12: Chemical Bonding

Section: Chapter Questions

Problem 64A

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(a) Use the VSEPR theory to predict the structure of the NNO molecule. (b) The substance NNO has a small dipole moment. Which end of the molecule is more likely to be the positive end, based only on electronegativity?
A.) What is the electron-pair geometry for I in ICl4-? ____There are _____ lone pair(s) around the central atom, so the geometry of ICl4- is _____.B.) What is the electron-pair geometry for I in ICl5? ______There are _____ lone pair(s) around the central atom, so the geometry of ICl5 is _______.
An atom in a molecule is surrounded by four pairs of electrons: one lone pair and three bonding pairs. Describe how the four electron pairs are arranged about the atom. How are any of three of these pairs arranged in space? What is the geometry about this central, taking into account just the bonded atoms?
Which statement is always true according to VSEPR theory?(a) The shape of a molecule is determined only by repulsions among bonding electron groups.(b) The shape of a molecule is determined only by repulsions among nonbonding electron groups.(c) The shape of a molecule is determined by the polarity of its bonds.(d) The shape of a molecule is determined by repulsions among all electron groups on the central atom (or interior atoms, if there is more than one).
Propylene, C3H6,C3H6, is a gas that is used to form the important polymer called polypropylene. Its Lewis structure is (a) What is the total number of valence electrons in the propylene molecule? (b) How many valence electrons are used to make σσ bonds in the molecule? (c) How many valence electrons are used to make ππ bonds in the molecule? (d) How many valence electrons remain in nonbonding pairs in the molecule? (e) What is the hybridization at each carbon atom in the molecule?
Use VSEPR to explain why the HBH bond angle of BH3 is 120°. (Hint: What is one-third of360°?)
For each of the following molecules or molecular ions, give the steric number, sketch and name the approximate molecular geometry, and describe the direction of any distortions from the approximate geometry due to lone pairs. In each case, the central atom is listed first and the other atoms are all bonded directly to it. (a) TeH2 (b) AsF3 (c) PCl4+ (d) XeF5+
Describe the VSEPR model. How is the model used to predict molecular structure?
u have seen that molecules with four electron pairs. such as CH4, are tetrahedral. What if a molecule had six electron pairs, like SF6? Predict the geometry and bond angles of SF6.
Explain VSEPR theory. According to this theory, what determines the shapes of molecules?
• use models (real or software) to help visualize common molecular shapes.
The molecule XF3 has a dipole moment. Is X boron or phosphorus?

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VSEPR structures are based on analysis of Lewis structures. Select one: а. TRUE only part of the time b. FALSE С. TRUE