Chemistry: An Atoms First Approach
2nd Edition
ISBN: 9781305079243
Author: Steven S. Zumdahl, Susan A. Zumdahl
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 44E
The space-filling models of hydrogen cyanide and phosgene are shown below.
Use the localized electron model to describe the bonding in hydrogen cyanide and phosgene.
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Suppose that a molecule has four bonding groups and one lone pair on the central atom. Suppose further that the molecule is confined to two dimensions (this is a purely hypothetical assumption for the sake of understanding the principles behind VSEPR theory). Draw the molecule and estimate the bond angles.
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The caffeine molecule is shown below. Indicate the electron geometry AND the molecular shape around each of the indicated atoms (six answers in total). Be aware that the angles may not be drawn correctly in this Lewis structure.
Chapter 4 Solutions
Chemistry: An Atoms First Approach
Ch. 4 - Explain the main postulate of the VSEPR model....Ch. 4 - Explain why CF4 and Xef4 are nonpolar compounds...Ch. 4 - Consider the following compounds: CO2, SO2, KrF2,...Ch. 4 - Prob. 4RQCh. 4 - What hybridization is required for central atoms...Ch. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - What are molecular orbitals? How do they compare...Ch. 4 - Explain the difference between the and MOs for...Ch. 4 - Prob. 3ALQ
Ch. 4 - Which of the following would you expect to be more...Ch. 4 - Arrange the following molecules from most to least...Ch. 4 - Which is the more correct statement: The methane...Ch. 4 - Prob. 7ALQCh. 4 - Prob. 8ALQCh. 4 - Which of the following statements is/are true?...Ch. 4 - Give one example of a compound having a linear...Ch. 4 - In the hybrid orbital model, compare and contrast ...Ch. 4 - Prob. 13QCh. 4 - Prob. 14QCh. 4 - Prob. 15QCh. 4 - Prob. 16QCh. 4 - Compare and contrast bonding molecular orbitals...Ch. 4 - Prob. 18QCh. 4 - Why does the molecular orbital model do a better...Ch. 4 - The three NO bonds in NO3 are all equivalent in...Ch. 4 - Predict the molecular structure (including bond...Ch. 4 - Predict the molecular structure (including bond...Ch. 4 - Predict the molecular structure and bond angles...Ch. 4 - Prob. 24ECh. 4 - Prob. 25ECh. 4 - Two variations of the octahedral geometry (see...Ch. 4 - Predict the molecular structure (including bond...Ch. 4 - Predict the molecular structure (including bond...Ch. 4 - State whether or not each of the following has a...Ch. 4 - The following electrostatic potential diagrams...Ch. 4 - Which of the molecules in Exercises 21 and 22 have...Ch. 4 - Which of the molecules in Exercises 27 and 28 have...Ch. 4 - Write Lewis structures and predict the molecular...Ch. 4 - Write Lewis structures and predict whether each of...Ch. 4 - Consider the following Lewis structure where E is...Ch. 4 - Consider the following Lewis structure where E is...Ch. 4 - The molecules BF3, CF4, CO2, PF5, and SF6 are all...Ch. 4 - Two different compounds have the formula XeF2Cl2....Ch. 4 - Use the localized electron model to describe the...Ch. 4 - Use the localized electron model to describe the...Ch. 4 - Use the localized electron model to describe the...Ch. 4 - Use the localized electron model to describe the...Ch. 4 - The space-filling models of ethane and ethanol are...Ch. 4 - The space-filling models of hydrogen cyanide and...Ch. 4 - Prob. 45ECh. 4 - Prob. 46ECh. 4 - Prob. 47ECh. 4 - Give the expected hybridization of the central...Ch. 4 - For each of the following molecules, write the...Ch. 4 - For each of the following molecules or ions that...Ch. 4 - Prob. 51ECh. 4 - The allene molecule has the following Lewis...Ch. 4 - Indigo is the dye used in coloring blue jeans. The...Ch. 4 - Prob. 54ECh. 4 - Prob. 55ECh. 4 - Many important compounds in the chemical industry...Ch. 4 - Two molecules used in the polymer industry are...Ch. 4 - Hot and spicy foods contain molecules that...Ch. 4 - One of the first drugs to be approved for use in...Ch. 4 - The antibiotic thiarubin-A was discovered by...Ch. 4 - Prob. 61ECh. 4 - Sketch the molecular orbital and label its type (...Ch. 4 - Prob. 63ECh. 4 - Which of the following are predicted by the...Ch. 4 - Prob. 65ECh. 4 - Prob. 66ECh. 4 - Prob. 67ECh. 4 - Using the molecular orbital model to describe the...Ch. 4 - Prob. 69ECh. 4 - A Lewis structure obeying the octet rule can be...Ch. 4 - Using the molecular orbital model, write electron...Ch. 4 - Using the molecular orbital model, write electron...Ch. 4 - In which of the following diatomic molecules would...Ch. 4 - In terms of the molecular orbital model, which...Ch. 4 - Prob. 75ECh. 4 - Show how a hydrogen 1s atomic orbital and a...Ch. 4 - Use Figs. 4-54 and 4-55 to answer the following...Ch. 4 - The diatomic molecule OH exists in the gas phase....Ch. 4 - Prob. 79ECh. 4 - Describe the bonding in NO+, NO, and NO, using...Ch. 4 - Describe the bonding in the O3 molecule and the...Ch. 4 - Prob. 82ECh. 4 - Prob. 83AECh. 4 - Vitamin B6 is an organic compound whose deficiency...Ch. 4 - Two structures can be drawn for cyanuric acid: a....Ch. 4 - Prob. 86AECh. 4 - What do each of the following sets of...Ch. 4 - Aspartame is an artificial sweetener marketed...Ch. 4 - Prob. 89AECh. 4 - The three most stable oxides of carbon are carbon...Ch. 4 - Prob. 91AECh. 4 - Which of the following molecules have net dipole...Ch. 4 - The strucrure of TeF5 is Draw a complete Lewis...Ch. 4 - Complete the following resonance structures for...Ch. 4 - Prob. 95AECh. 4 - Describe the bonding in the first excited state of...Ch. 4 - Using an MO energy-level diagram, would you expect...Ch. 4 - Show how a dxz. atomic orbital and a pz, atomic...Ch. 4 - What type of molecular orbital would result from...Ch. 4 - Consider three molecules: A, B, and C. Molecule A...Ch. 4 - Prob. 101CWPCh. 4 - Predict the molecular structure, bond angles, and...Ch. 4 - Draw the Lewis structures for SO2, PCl3, NNO, COS,...Ch. 4 - Draw the Lewis structures for TeCl4, ICl5, PCl5,...Ch. 4 - A variety of chlorine oxide fluorides and related...Ch. 4 - Pelargondin is the molecule responsible for the...Ch. 4 - Complete a Lewis structure for the compound shown...Ch. 4 - Prob. 108CWPCh. 4 - Consider the molecular orbital electron...Ch. 4 - Place the species B2+ , B2, and B2 in order of...Ch. 4 - The compound NF3 is quite stable, but NCl3 is very...Ch. 4 - Predict the molecular structure for each of the...Ch. 4 - Prob. 113CPCh. 4 - Cholesterol (C27liu;O) has the following...Ch. 4 - Cyanamide (H2NCN), an important industrial...Ch. 4 - As compared with CO and O2, CS and S2 are very...Ch. 4 - Prob. 117CPCh. 4 - Use the MO model to explain the bonding in BeH2....Ch. 4 - Prob. 119CPCh. 4 - Arrange the following from lowest to highest...Ch. 4 - Prob. 121CPCh. 4 - Prob. 122CPCh. 4 - Carbon monoxide (CO) forms bonds to a variety of...Ch. 4 - The space-filling model for benzoic acid, a food...Ch. 4 - As the bead engineer of your starship in charge of...Ch. 4 - A flask containing gaseous N2 is irradiated with...Ch. 4 - Determine the molecular structure and...
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- What aspect of the following Lewis structure indicates that the concept of coordinate covalency is needed to explain the bonding in the molecule?arrow_forwardThe Lewis structure for SF6 is shown below. This sulfur S atom in this molecule has an expanded octet, and you are not expected to be familiar with the specific electron geometry and molecular geometry for expanded octets. Still, we can make some predictions with the knowledge that we have. Would you predict the electron geometry and molecular geometry for SF6 to be the same or to differ? Please briefly explain your answer.arrow_forwardPredicting the arrangement of electron groups around the central atom of a molecule.arrow_forward
- Describe the bonding (including σ and п bonds) on an N atom in dinitrogen difluoride, N2F2, using valence bond theory.arrow_forwardUse VSEPR theory to predict the electron-pair geometry and the molecular geometry of iodine trichloride, ICl3.arrow_forwardGiven below is a Lewis structure skeleton of a molecule. Rank the C-N bonds, A, B, C, in terms of decreasing bond strength.arrow_forward
- Which statement best captures the fundamental idea behind VSEPR theory? Explain what is wrong with the statements you do not choose. a. The angle between two or more bonds is determined primarily by the repulsions between the electrons within those bonds and other (lone pair) electrons on the central atom of a molecule. Each of these electron groups (bonding electrons or lone pair electrons) lowers its potential energy by maximizing its separation from other electron groups, thus determining the geometry of the molecule. b. The angle between two or more bonds is determined primarily by the repulsions between the electrons within those bonds. Each of these bonding electrons lowers its potential energy by maximizing its separation from other electron groups, thus determining the geometry of the molecule. c. The geometry of a molecule is determined by the shapes of the overlapping orbitals that form the chemical bonds. Therefore, to determine the geometry of a molecule, you must determine…arrow_forwardThe molecular structure of hinokitiol is represented below (See attached image) Draw a complete Lewis structure of the molecule and answer the following questions. Complete the structure by adding ONLY hydrogen atoms to carbon atoms where needed. You must not create any other bonds. Atoms such as oxygen or nitrogen may have lone pairs to complete their octets. Each of the non-hydrogen atoms of this skeletal structure has been randomly numbered. Match the atom number with the orbital hybridization invoked for sigma bonding. Match these to the below (A)) (Options: sp3, sp2, sp, s, p, d2sp3, dsp3) A) 12, 9, 7, 2, 4 B) How many pairs of non-bonding electrons are there in the molecule? C) How many CH3 (methyl) groups are there in the molecule? D) How many CH2 (methylene) groups are there in the molecule? (i.e. # of C-atoms having exactly two bonded H-atoms) E) How many CH (methyne) groups are there in the molecule? (i.e. # of C-atoms having exactly one bonded H-atom) F) How many…arrow_forwardWhat The previous lesson helped us understand the compositions of molecules and their bonds through the Lewis structure theory. However, Lewis structures do not demonstrate one of the most important features of molecules-their overall shapes. The size and shapes of molecules are defined by the distances and angles between the nuclei of the atoms involved. In this lesson, we learn how to portrait a molecule by writing a two-dimensional structure for it and translating it to a three-dimensional shape, and we examine the effects of molecular shape on molecular polarity. What's New Activity 1: Review on Geometry Directions: Draw a two-dimensional or three-dimensional illustration of the following geometries: Example: Square Pyramidal: 1. Trigonal planar (2D) 2. Square Planar (3D) 3. Octahedral (3D) 4. Trigonal bipyramidal (3D) 5. Seesaw (3D) 13arrow_forward
- Why do you not need to specify the molecular shape for an atom with 1 electron group, such as AX1EN?arrow_forwardNitrogen is capable of forming single, double, or triple bonds, and the figure that follows shows the potential energy as a function of internuclear distance for each of these types of bonds. Match the three curves in the figure (A, B and C) to the three types of bonds. Explain your reasoning.arrow_forwardWhat is the molecular formula for this bond line structure?arrow_forward
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