63. The reaction of CH3CH2MgBr with CH3COCH2CH3 gives.:(A) an achiral product.(B)aofdiastereomers.；(
66.Consider the following two spectrums which are from the same compound BC, (A)(B)(C)(D)(E) None of
67. wh il1 be the major product ofadamantane (shown below) reacted with Br2 with the presence ofpero
69.Chemists develop several methods for preparation of ester. Using your knowledge, indicate the met
70-71 To complete the following multistep synthesis, please choose right reagent(s) from the followi
72.A 0.307-g sample of an unknown triprotic acid is titrated to the third equivalence point using 35
73. When the equation (basic solution) is balanced using the smallest whole-number coefficients, the
74. According to the Van Deemter equation, which of the following parameters would be independent of
75.Find the value of the equilibrium constant (K) (at 500 K) for The value for Kp at 500 K is1.5 x 1
76. For the stepwise dissociation of aqueous H3P04, which of the following is not a conjugate acid-b
77. Nitrogen gas (N2) reacts with hydrogen gas (H2) to form ammonia (NH3). At 200°C in a closed cont
78 When 10.0gof the hydrogen eas reacts with 10.0 g of oxygen gas to form water, what is the theoret
79. Find the mass percent ofCuSO4, in a solution whose density is 1.30 g/mL and whose molarity is 1.
80. Which of the following reactions could not give alcohol as product?(A) (B) (C) (D) (E)None ofthe
1. 0.28 g 的酸，HX，需要以 10.0 mL 的 0.14 M NaOH 溶液完全中和。請計算此酸的分子量?(A) 42.3 g/mol(B) 68.4 g/mol(C) 98.4 g/mo
2. 2C2H6 + 7O2 → 4CO2 + 6H2O 是一氧化還原反應方程式，請判斷以下答案何者是對的？(A)碳被氧化，氧被還原(B) 碳被還原，氧被氧化(C) 碳被氧化，氫被氧化(D)氧被還原，
3. 在以下的反應中：3Cu(s) + 8HNO3(aq) → 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g)6.3g 的 Cu 與 100mL 的 1.0M HNO3 混合，以下敘
5. 氣體 A 的擴散速率是氣體 B 的兩倍，氣體 B 的分子量為 60 g/mol，氣體 A 的分子量是：(A) 15 g/mol(B) 120 g/mol(C) 30 g/mol(D) 90 g/