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76. What is the product of the following reaction?

(A)
(B)
(C)
(D)
(E)

答案：登入後查看
統計： A(1), B(1), C(6), D(0), E(0) #2241249

其他試題

72. A certain carbohydrate compound (containing only C, H and O) is 53.3 % C, 11.1 % H, and 35.6 % O by mass. The experimentally determined molecular mass is 90 amu. What is the empirical and chemical formula for this carbohydrate? (A) C2H5O (B) C3H5O (C) CH3O (D) C3H5O2 (E) C4H10O2

73. Given the standard reaction enthalpies for the following reactions: What is △Ho for the reaction: C3H8(g) + 5 O2(g) → 3 CO2(g) + 4 H2O(g) (A) 773.3 kJ (B) -773.3 kJ (C) -2043.9 kJ (D) -2251.5 kJ (E) -2527.5 kJ

74. Propose a structure for a compound C5H10O that fit the following 1H-NMR data: δ 0.92 (3H, t, J = 7 Hz), 1.20 (6H, s), 1.50 (2H, q, J = 7 Hz), 1.64 (1H, br s). (A) isopentanol (B) 2-methyl-2-butanol (C) isopropyl methyl ketone (D) 2-methyl-1-butanol (E) ethyl propyl ether

75. How many signals are expected in the 13C NMR spectrum of the following compound? (A) 5 (B) 6 (C) 7 (D) 8 (E) 10

77. Rank the following in order of decreasing acid strength (most acidic FIRST). (A) ② ＞ ④ ＞ ① ＞ ③ (B) ① ＞ ③＞ ④ ＞ ② (C) ③＞ ① ＞ ②＞ ④ (D) ③＞ ①＞ ④ ＞ ② (E) ①＞ ② ＞ ③＞ ④

78. Which of the following choices correctly describe the solubility of benzoic acid (I) and 2-naphthol (II) in the aqueous solution shown?(A)(B)(C)(D)(E)

79. Which of the following compounds will undergo decarboxylation on heating? (A) ①and ② (B) ② and ③ (C) ③ and ④ (D) ③only (E) ④ only

80. What is the product from the following esterification? (A) (B) (C) (D)

1.右圖中表示某桿件在光滑斜面上的支持(support)方式，根據力學分析，支持部位有幾個未知的反應 (reaction)力？(A)1個(B)2個(C)3 個 (D) 4 個

2.某懸臂樑截面為正方形，邊長為40mm。受到800 N 的軸向拉力，請問軸向平均拉應力(average tensile stress) 為何？ (A)200 kPa (B) 300 kPa (C) 400 kPa (D) 500 kPa

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