39. Silver acetate (AgC2H3O2)is a sparingly soluble salt with Ksp = 1.9 ✖ 10- 3. Consider a saturate
41. Indicate the alcohols (or acids) has the lowest pKa value?(A) 2,2,2-trifluoroethanol(B) 2,2-dime
42. Consider the NMR spectrum of BA, which is shown below. The formula of compound BA is C8H7C1O. Th
43.When compound I was heated in ethanol, an ether product was collected (shown below) The mechanism
45.The composition of compound AZ is C7H140 and its spectrum shows the following signals: 6H triplet
46. The rate of a reaction typically increases as the temperature increases because.(A) the A term i
47. If a mixture contains 75% of one compound and 25% of its enantiomer，what is the e.e. of the mixt
49 Which of the following most closely matches the C C stretching frequency.(A) 3300(B)3000(C)2200(D
50. Which of the following compounds will undergo Friedel-Crafts alkylation with (CH3)3CC1, A1CI3 mo
51. Which of the following is the most reactive carboxylic acid derivative?(A) ester(B)anhydride(C)n
52. Lithium aluminum hydride reduces carboxylic acids, acid chlorides, and esters to.(A)aldehydes.(B
55. What two atomic orbitals or hybrid atomic orbitals overlap to form the C-C % bond in ethylene?(A
58. If 30 mL of 5.0 x 10-4M Ca(NO 3)2 are added to 70 mL of 2.0 ✖ 10-4 M NaF, will a precipitate occ
59. A galvanic cell consists of a left compartment with a tin electrode in contact with 0.1 M Sn(N03