·which of the following acids in each pair is the strongest a. hydrocyanic acid
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·which of the following acids in each pair is the strongest a. hydrocyanic acid or ethanol c. trifluoroacetic or dichloroacetic acid b. hydrochloric or hydroiodic acid d. ammonium or water 2. HBr is a stronger acid than HCl due to a. the H-Cl bond is weaker than the H-Br b. the conjugate base of HBr is more stable due to size of Br ion c. the conjugate base of HCl is more stable due to the electronegativity of Cl d. the additional resonance stabilization of conjugate base by the CI-ion 3. When NH3 reacts with BH, a boron-nitrogen bond is formed joining the two compounds. Which is the electrophile in this reaction? a. Electrophile BHs b. Nucleophile NH 4. Draw the resonance structures for CH:NN, calculate the formal charges on each structure and circle the more stable resonance structure. 5. Which of the following bonds will have the largest dipole moment? a. C-H b. C-0 c. C-s 6. Move the electrons around to show how the charge moves around in each resonance structure. How many atoms share the charge in each form? O C -7. Circle the more stable ion in each pair: b. CH2 8. Predict the products of the following acid base reactions: 9. Which of the following is the stronger acid? 10. Which of the following compounds does not have the molecular formula CaH140? a. 1-hexanol d. 3-methyl-3-pentanol b. 2-hexanol c. 3-methyl-2-pentanol e. cyclohexanol - _1 1, which of the following will have the lowest boiling point? of the for b. CH a. CH,C CCH Cl d. CHCl, e.CClExplanation / Answer
12. AlCl3 is lewis acid because the Al has vacant orbital and it can accept lone pair of electrons.
13. CH3-N(CH3)-CH3 is the tertiary amine because Nitrogen does not have any hydrogen.
14. the structure is t-butane.
15. 2,2,3,6-tetramethylheptane.
16. (CH3)3CH is more soluble in butane because like dissolves like. butane is non-polar.
17. B is the right answer. ethane has eclipsed and staggered conformation.
18. e is the right answer. anti conformation of butane is the lowest energy.
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