22.What is the correct IUPAC name for the following molecule: )2-ethyl-2.6-dimethylheptane D)2.6,6-trimethyloctane B) 1,1,5,5-tetramethylhexane E)4,4-dimethyl-1-isopropylhexane Ans: -etramethytheptane 23.What is the name given to the Newman projection of the butane conformation shown here? CHa A)eclipsed B) gauche C)staggered D)anti E)skewed Ans:D 24.Calculate AG°for the following reaction at25℃and△S-0 CH4 Br2 CHBr HBr Bond Ave Strengt地 C-C 83 (kcal/mol 99 (kcal/mol Br-Br 46(keal/mol) -34 kcal/r none of the above Ans:A 25.Which of the following has the highest pKa? A)HI B)NH3 C)HNO3 D)CHsCOOH E)H2SO4 Ans:B Page 8Page 8 22. What is the correct IUPAC name for the following molecule: A) 2-ethyl-2,6-dimethylheptane D) 2,6,6-trimethyloctane B) 1,1,5,5-tetramethylhexane E) 4,4-dimethyl-1-isopropylhexane C) 1,1,5,5-tetramethylheptane Ans: D 23. What is the name given to the Newman projection of the butane conformation shown here? CH3 H H CH3 H H A) eclipsed B) gauche C) staggered D) anti E) skewed Ans: D 24. Calculate ΔGo for the following reaction at 25 o C and ΔS=0 A) –10 kcal/mol D) –34 kcal/mol B) 10 kcal/mol E) none of the above C) 34 kcal/mol Ans: A 25. Which of the following has the highest pKa? A) HI B) NH3 C) HNO3 D) CH3COOH E) H2SO4 Ans: B