Concept explainers
The following ball-and-stick molecular model is a representation of acetaminophen, the active ingredient in such over-the-counter headache remedies as Tylenol.
(a) What is the formula of acetaminophen?
(b) Indicate the positions of the multiple bonds in acetaminophen.
(c) What is the geometry around each carbon?
(d) What is the hybridization of each carbon?
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CHEMISTRY-MOD.MASTERING (18W)
- 3-107 Ephedrine, a molecule at one time found in the dietary supplement ephedra, has been linked to adverse health reactions, such as heart attacks, strokes, and heart palpitations. The use of ephedra in dietary supplements is now banned by the FDA. (a) Which is the most polar bond in ephedra? (b) Would you predict ephedra to be polar or nonpolar?arrow_forward3-119 Perchloroethylene, which is a liquid at room temperature, is one of the most widely used solvents for commercial dry cleaning. It is sold for this purpose under several trade names, including Perciene®. Does this molecule have polar bonds? Is it a polar molecule? Does it have a dipole?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_forward
- 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_forwardWhich compounds have nonpolar covalent bonds, which have polar covalent bonds, and which have ions? (a) LiF (b) CH3F (c) MgCl2 (d) HClarrow_forwardEthylene, C₂H₄, and tetrafluoroethylene, C₂F₄, are used tomake the polymers polyethylene and polytetrafluoroethylene(Teflon), respectively.(a) Draw the Lewis structures for C₂H₄ and C₂F₄, and give theideal H-C-H and F-C-F bond angles.(b) The actual H-C-H and F-C-F bond angles are 117.4and 112.4, respectively. Explain these deviations.arrow_forward
- 3. Consider the four compounds BB33, CB14, NB13, and Br,O. Use periodic trends in bond lengths and the electronegativity table in Chang to answer the following questions: (a) Which molecule is expected to have the longest bonds? (b) Which molecule is expected to have the most polar bonds? (c) Which molecule is expected to have the least polar bonds?arrow_forwardState whether each of these statements is true or false. (a)A carbon–carbon triple bond is shorter than a carbon–carbonsingle bond. (b) There are exactly six bonding electrons inthe O2 molecule. (c) The C—O bond in carbon monoxide islonger than the C—O bond in carbon dioxide. (d) The O—Obond in ozone is shorter than the O—O bond in O2. (e) Themore electronegative the atom, the more bonds it makes toother atoms.arrow_forwardFor each of the following covalent bonds: (a) use the symbols δ+ and δ- to indicate the direction of polarity (if any).(a) C-F; (b) N-Br; (c) B-C; (d) Si-H(b) Rank the following covalent bonds in order of increasing polarity. (i) C-H, O-H, N-H; (ii) C-N, C-O, B-O; (iii) C-P, C-S, C-Narrow_forward
- How many lone pairs are on each of the following atoms? (a) Br in HBr? (b) S in H2S? (c) C in CH4?arrow_forwardDraw a Lewis Structure for each of the following species and assign formal charge where appropriate. Using electronegative values from the period table that was provided identify polar covalent bonds and label the atoms δ+ and δ−. For each of the molecules indicate whether or not it has a dipole moment. (a)CH5N (b) HCN (c) H2CO (d) CH3NC(e) CH3SOCH3 (f) H6BNarrow_forwardUrea, (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?arrow_forward
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