please answer the 2 questions please 15. Which is the correct Lewis structure for acetic acid (CH;CO2H)?н:0:н-с-с-0:H-ö:н-с-С-он :0:H-c-ö-C-HH:o:н-с-с-б-нннHHIIIIIVА) І B) II С) II D) IV16. In which of the following ions does carbon have a formal charge?[(CH3)4N]*[CH;CO2]F[CH;OH2]*IIIIIIA) I B) II C) II D) None of the above

Formal charge is a charge assigned to an Atom in a molecule

Answered: 15. Which is the correct Lewis…

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter6: Covalent Bonding

Section: Chapter Questions

Problem 77QRT

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Formamide, HC(O)NH2, is prepared at high pressures from carbon monoxide and ammonia, and serves as an industrial solvent (the parentheses around the O indicate that it is bonded only to the carbon atom and that the carbon atom is also bonded to the H and the N atoms). Two resonance forms (one with formal charges) can be written for formamide. Write both resonance structures, and predict the bond angles about the carbon and nitrogen atoms for each resonance form. Are they the same? Describe how the experimental determination of the HNH bond angle could be used to indicate which resonance form is more important.
SO < SO2< SO32-( a) Match each species with the number of covalent bonds predicted by Lewis structures to exist between an S atom and an O atom bonded to this S atom. (Hint: Average the number of bonds between S and an attached oxygen atom in a particular position using all of your resonance structures for the species that you are working on.)SO32- : is it 1.00, 1.33, 1.50, 2.00, 3.00 (b) Match each species with the correct formal charge on the central S atom. SO32- : is it -1.00 , -0.67 , -0.50, 0.00, +1.00, or +2.00 ? (c) Match each species with the average formal charge on an outside oxygen atom predicted by Lewis structures. SO32- : is it -1.00 , -0.67 , -0.50, 0.00, +1.00, or +2.00 ?
10. The following Lewis structures for (a) HCN, (b) C3H;, (c) SnOz, (d) BF3, (e)HOF are incorrect. Explain what is wrong with each one and give a correct structure for the molecule. (Relative positions of atoms are shown correctly.) (a) H-ëN (b) HCC-H (c) 0-Sn-0 (d) :F B :F: (e) H-O-F:
4. The following are valid Lewis structures for CH3SOCH3. Label the formal charges and circle the best Lewis structure. H :ö: H H :0 H a) H-C=S-C-H b) Н—С—S— С-н H. H. H. H. Н :0: Н H :ö: H d) H-C=$-C-H c) Н—С—$—С-н H. H. H H
3. Use formal charge to choose the best Lewis structure for CH;SOCH3. H :ö: H H :ö H a) H-C=S-C-H b) H-C-S-C-H н н H H :ö: H H :ö: H с) Н—С—S—С—н d) H-C=S-C-H H H H.
Given the following bond energies (in kJ/mol): ВЕН-Н) — 436; ВЕ(С-С) 3 345; BE(C=C) = 611; BE(N=N) = 946; ВЕ(С-Н) 3 415; BE(N-H) = 390; BE(H-CI) = 432; BE(C-CI) = 330; Calculate the enthalpy change, AH (in kJ), for the following reactions, and indicate whether the reaction is endothermic or exothermic. (a) N2(g) + 3H2(g) → 2NH3(g) (b) CH;CH2CI(g) → H;C=CH2(g) + HCl(g)
For 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-N
Write Lewis Structure and Determine the Formal Charge of H C N H N C Which is the best way to represent hydrocyanic acid? Why?
Formula Lewis Electron Molecular Bond Polar or Attractive Structure Pair Geometry Angle Force Non Polar Geometry Between Molecules CH4 Around First C Around First C C2H4 Around First C Around First C C,H2 Around First C Around First C CH;OH Around O Around O C2H;OH Around O Around O CH20 CH,OCH, Around O Around O CH;COOH Central C Central C НСООН Central C Central C CH;NH2 Around N Around N CH;COCH; Central C Central C
CH CH, CHE1S0S JANUARY FEBRUARY 2021 20) Which of the following structures is the CORRECT resonance structure of the following molecule: :o: CH5 (A) CH, CH, CH3- (B) Co-H (C) HO CH,CH3 (D) CH,CH-CH, 21) Which statement about the CH2=CH2 molecule is CORRECT? A) The size of the H-C-H bond angle is 130° B) the molecule has a tetrahedral structure C) The pi (T) bond is formed by the overlap of ONE p-atomic orbital of carbon with ONE p-atomic orbital of carbon D) The carbon atom is sp hybridized 22) When a hydrocarbon burns in air, what component of air reacts? A) Carbon dioxide в) Охудen C) Nitrogen D) Water (TURN OVER] CHE1S05 JANUARY FEBRUARY 2021 23. What is the CORRECT IUPAC name for the structure below? A) 3-methyl-4-ethylheptene B) 4-ethyl-3-methylhept-3-ene C) 4-ethyl-5-methylhept-4-ene D) 2,3-diethylhex-2-ene 24. What is the condensed formula of the compound below? OH он Br Br A) CH,CH2(OH)CH(CHs)CH2CH2(CH3)CHBr2 B) CH;CH(OH)CH(CH3)CH;CH(CHa)CHBr2 C) CHa(OH)CH(CH:)CHCH2(CH:)CHBR2CH…
Which of the following Lewis structures will have resonance form H | H-C | H O-H :0: H-CN: H C H || :0: 0=5=0
Which of the following pairs represent resonance structures? I. [ö=N=ộ] [ö=i–öl II. S=S=C III. 0=0—0: IV. [S=C=N] ○ O ○ O O II, III and IV I, III and IV I, II, III and IV II and IV I, II and III S=C=S :0-0=0 [: $—c=N | I

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