References] Why is the molecular structure of H2O nonlinear, whereas that of BeF2 is linear, even though both molecules consist of three atoms2 O There are two nonbonding pairs of electrons that affect the F-Be-F bond angle. O There is one nonbonding pair of electrons that affects the H-O-H bond angle. O There is one nonbonding pair of electrons that affects the F-Be-F bond angle. O There are two nonbonding pairs of electrons that affect the H-O-H bond angle.

References] Why is the molecular structure of H2O nonlinear, whereas that of BeF2 is linear, even though both molecules consist of three atoms2 O There are two nonbonding pairs of electrons that affect the F-Be-F bond angle. O There is one nonbonding pair of electrons that affects the H-O-H bond angle. O There is one nonbonding pair of electrons that affects the F-Be-F bond angle. O There are two nonbonding pairs of electrons that affect the H-O-H bond angle.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter4: Molecular Structure And Orbitals

Section: Chapter Questions

Problem 107CWP: Complete a Lewis structure for the compound shown below, then answer the following questions. What...

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7.97 Consider the structure shown below for as well as any other important resonance structures. (a) What is the expected O—N—O bond angle in this structure? (b) The molecule contains N—O bonds of two different lengths. How many sborter N—O bonds would be present?
rite a Lewis structure for each of the following simple molecules. Show all bonding valence electron pairs as lines and all nonbonding valence electron pairs as dots. msp;a.GeH4c.NI3b.ICld.PF3
For each of the following molecules or ions, indicate the bond angle expected between the central atom and any two adjacent hydrogen atoms. msp;a.H2Ob.NH3c.NH4+d.CH4
Use the Molecule Shape simulator (http://openstaxcollege.org/I/6MolecShape) to build a molecule. Starting with the central atom, click on the double bond to add one double bond. Then add one single bond and one lone pair. Rotate the molecule to observe the complete geometry. Name the electron group geometry and molecular structure and predict the bond angle. Then click the check boxes at the bottom and right of the simulator to check your answers.
Successive substitution of F atoms for H atoms in the molecule CH4 produces the molecules CH3F, CH2F2, CHF3, and CF4. a. Draw Lewis structures for each of the five molecules. b. Using VSEPR theory, predict the geometry of each of the five molecules. c. Specify the polarity (polar or nonpolar) for each of the five molecules.
Chlorofluorocarbons have been banned because they cause ozone depletion. The main replacements are hydrofluorocarbons, such as CF3CFH2. Draw a Lewis structure for CF3CFH2, determine its geometry, make a sketch of the molecule, and determine whether it is polar. (The two carbons are bonded to each other in the middle of the molecule, and the other atoms are bound to the two central carbon atoms.)
Complete a Lewis structure for the compound shown below, then answer the following questions. What are the predicted bond angles about the carbon and nitrogen atoms? How many lone pairs of electrons are present in the Lewis structure? How many double bonds are present?
Which of the following statements is false concerning bonding? Elements with extremely different electronegativities tend to form ionic bonds with each other. In an N—O bond. electron density is greater near the O atom. An N—O bond is an example of a polar covalent band. In general, chemical bonds form to minimize energy. The bond in KBr is formed by sharing electrons.
Use the simulation (http://openstaxcollege.org/l/16MolecPolarity) to perform the following exercises for a real molecule. You may need to rotate the molecules in three dimensions to see certain dipoles. (a) Sketch the bond dipoles and molecular dipole (if any) for O3 Explain your observations. (b) Look at the bond dipoles for NH3. Use these dipoles to predict whether N or H is more electronegative. (c) Predict whether there should be a molecular dipole for NH3 and, if so, in which direction it will point. Check the molecular dipole box to test your hypothesis.
7.93 An unknown metal M forms a chloride with the formula This chloride compound was examined and found to have a trigonal pyramidal shape. Draw a Lewis structure for that is consistent with this molecular geometry. Use your structure to propose an identity for the metal M and explain how you have nude your choice.
Carbon monoxide (CO) forms bonds to a variety of metals and metal ions. liS ability to bond to iron in hemoglobin is the reason that CO is so toxic. The bond carbon monoxide forms to metals is through the carbon atom: MCO a. On the basis of electronegativities, would you expect the carbon atom or the oxgen atom to form bonds to metals? b. Assign formal charges to the atoms in CO. Which atom would you expect to bond to a metal on this basis? c. In the MO model, bonding MOs place more electron density near the more electronegative atom. (See the HF molecule in Figs. 4-54 and 4-55.) Antibonding MOs place more electron density near the less electronegative atom in the diatomic molecule. Use the MO model to predict which atom of carbon monoxide should form bonds to metals.
Why are all diatomic molecules linear, regardless of the number of valence electron pairs on the atoms involved?