Introduction to General, Organic and Biochemistry
12th Edition
ISBN: 9780357391594
Author: Frederick A. Bettelheim; William H. Brown; Mary K. Campbell
Publisher: Cengage Learning US
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Chapter 10, Problem 48P
Urea, (NH.,)2CO, is used in plastics and in fertil izers. It is also the primary nitrogen-containing substance excreted by humans.
O
I
I
H
H
Urea
- Complete the Lewis structure of urea, showing all valence electrons.
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3. Carbon atoms will bond with each other to form a chain, often with the peripheral atoms being hydrogen. These compounds, hydrocarbons, are organic compounds composed only of carbon and hydrogen. However, when hydrogen atoms are substituted with other elements, such as fluorine, this changes the properties of the molecule. Methylfluoride (CH3F), a substituted hydrocarbon, is used in semiconductor processing. Figure 1 depicts an incorrect Lewis structure for CH3F.
(QUestion shown in photo)
Which reason best explains why this structure is incorrect?
a) Hydrogen lacks an octet.
b) Too few electrons are used.
c) Carbon cannot exceed an octet.
d) Fluorine atom has too many electrons.
Urea, (NH2)2CO, is used in plastics and fertilizers. It is also the primary nitrogencontaining substance excreted by humans.(a) Which bonds in the molecule are polar, and which are nonpolar?(b) Which is the most polar bond in the molecule? Which atom is the negative end of the bond dipole?
Please note that "geometry" refers to the molecular or ionic geometry.
Recall that for predicting geometry, double and triple bonds count as only one electron pair.
The Lewis diagram for NOCI is:
6=N_C:
The electron-pair geometry around the N atom in NOCI is
There is/are
lone pair(s) around the central atom, so the geometry of NOCI is
The Lewis diagram for CS₂ is:
S=C=S
The electron-pair geometry around the C atom in CS2 is
There is/are
lone pair(s) around the central atom, so the geometry of CS2 is
Chapter 10 Solutions
Introduction to General, Organic and Biochemistry
Ch. 10.3 - Prob. 10.1QCCh. 10.4 - Prob. 10.2QCCh. 10.4 - Prob. 10.3QCCh. 10.4 - Prob. 10.4QCCh. 10.4 - Prob. 10.5QCCh. 10.4 - Prob. 10.6QCCh. 10 - Prob. 1PCh. 10 - Prob. 2PCh. 10 - 10-9 Is there any difference between vanillin made...Ch. 10 - Prob. 4P
Ch. 10 - 10-11 What important experiment did Wohler carry...Ch. 10 - Prob. 6PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - 10-15 How many electrons are in the valence shell...Ch. 10 - 10-16 What is the relationship between the number...Ch. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - 10-19 Write Lewis structures for these ions. (a)...Ch. 10 - 10-20 Why are the following molecular formulas...Ch. 10 - 10-21 Explain how to use the valence-shell...Ch. 10 - 10-22 Suppose you forget to take into account the...Ch. 10 - Suppose you forget to take into account the...Ch. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - 10-27 What is meant by the term functional group?Ch. 10 - 10-28 List three reasons why functional groups are...Ch. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - 10-32 Draw a structural formula for the one...Ch. 10 - 10-33 What is the meaning of the term tertiary (...Ch. 10 - Prob. 28PCh. 10 - Draw structural formulas for each of the...Ch. 10 - 10-36 Draw structural formulas for the six ketones...Ch. 10 - 10-37 Draw structural formulas for the eight...Ch. 10 - Prob. 32PCh. 10 - 10-39 (Chemical Connections 10A) How was Taxol...Ch. 10 - Prob. 34PCh. 10 - Prob. 35PCh. 10 - Silicon is immediately below carbon in Group 4A of...Ch. 10 - 10-43 Phosphorus is immediately below nitrogen in...Ch. 10 - Draw the structure for a compound with the...Ch. 10 - 10-45 Draw structural formulas for the eight...Ch. 10 - Prob. 40PCh. 10 - 10-47 Which of these covalent bonds are polar, and...Ch. 10 - Of the bonds in Problem 10-47, which is the most...Ch. 10 - Prob. 43PCh. 10 - Prob. 44PCh. 10 - Following is a structural formula for naphthalene....Ch. 10 - Prob. 46PCh. 10 - Prob. 47PCh. 10 - Urea, (NH.,)2CO, is used in plastics and in fertil...Ch. 10 - Prob. 49PCh. 10 - Prob. 50PCh. 10 - Aspirin is prepared by the reaction of salicylic-...Ch. 10 - Following is the structural formula of acetamide....Ch. 10 - Prob. 53P
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- Given the bonds C N, C H, C Br, and S O, (a) which atom in each is the more electronegative? (b) which of these bonds is the most polar?arrow_forwardSuccessive substitution of F atoms for H atoms in the molecule NH3 produces the molecules NH2F, NHF2, and NF3. a. Draw Lewis structures for each of the four molecules. b. Using VSEPR theory, predict the geometry of each of the four molecules. c. Specify the polarity (polar or nonpolar) for each of the four molecules.arrow_forwardSuccessive 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.arrow_forward
- Consider the pyrosulfate ion, S2O72-. It has no sulfur–sulfur nor oxygen–oxygen bonds. (a) Write a Lewis structure for the pyrosulfate ion using only single bonds. (b) What is the formal charge on the sulfur atoms for the Lewis structure you drew in part (a)? (c) Write another Lewis structure using six bonds and two O—S bonds. (d) What is the formal charge on each atom for the structure you drew in part (c)?arrow_forward3-106 Consider the structure of Penicillin G shown below, an antibiotic used to treat bacterial infections caused by gram-positive organisms, derived from Penicillium fungi: (a) Identify the various types of geometries present in each central atom using VSEPR theory. (b) Determine the various relative bond angles associated with each central atom using VSEPR theory (c) Which is the most poiar bond in Penicillin G? (d) Would you predict Penicillin G to be polar or nonpolar?arrow_forwardIn addition to CO, CO2, and C3O2, there is another molecular oxide of carbon, pentacarbon dioxide, C5O2, a yellow solid. (a) What is the approximate C-to-C-to-O bond angle in pentacarbon dioxide? (b) What is the approximate C-to-C-to-C bond angle in this compound?arrow_forward
- Acrolein is the starting material for certain plastics. (a) Which bonds in the molecule are polar and which are nonpolar? (b) Which is the most polar bond in the molecule? Which atom is the partial negative end of this bond?arrow_forwardThe electrostatic potential surface for SOCl2 is pictured here. (a) Draw a Lewis electron dot picture for the molecule, and give the formal charge of each atom. (b) What is the molecular geometry of SOCl2? Is it polar?arrow_forwardhat does temperature measure? Are the molecules in a beaker of warm water moving at the same speed as the molecules in a beaker of cold water? Explain? What is heat? Is heat the same as temperature?arrow_forward
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