1.Arrange the following according to expected value for a (pressure correction value)in van der waal's equation. H2, N2, CH4,Ne,H2O (96成大) 答案为 H2O>N2>CH4>H2>Ne 我自己的答案 H2O>N2>CH4>Ne>H2 (用HB和分子量比出来) 2.Which substance will have the highest entropy? (96中兴) A) Butane B) Isobutane C) Isopentane D)Pentane E) Neopentane 答案为 D 我毫无头绪 =..= 3.Compound 1 has a composition of 46.7 mass% of element A and 53.3mass% of element B . A and B also form a second binar compound (compound2).If the composition of the two compounds are consistent with the law of multiple proportions ,which of the following composition could be that of compound2? A)23.4 mass%A;76.6 mass %B B)30.4 mass%A;69.6 mass%B (97成大生科) C)33.3 mass%A;66.7 mass %B D)53.3 mass%A;46.7 mass%B E)73.3 mass%A;26.7 mass %B 答案为 C 毫无头绪 =..= 4.Which of the following statements about orbital energies is correct? (97成大生蚵) D) The splitting of sublevels in many-electron atoms is explained in terms of the penetration effect. E) The energy of a given orbital increases as the nuclear charge Z increases. 答案为D 我答案写E 因为我想说E=-K Z^/N^ 如果Z越大 E就越负 代表能量越小 5. 2NO + O2 -> 2NO2 97成大化工的计算最後一题 他问d[NO2]/dt=? 经一番计算後我求出其R=K[NO]^[O2] 那答案 是否为 " 2 K[NO]^[O2]"?? 6. What is the formula for the compound that crystallizes with a face-centered cubic unit cell of sulfur ions ,and that contains zinc ions in half of the tetrahedral holes? 答案为 ZnS 我想说 Zn = 4 然後S = 4/2=2(half of tetrahedral holes) = Zn2S 7.The observed color of Ti(H2O)6 3+ is violet. What wavelength do you expect to have an absorption maximum on an UV-VIS spectrum? A) 400 B)570 C)650 D)700 答案为D 我想说 观察的颜色是紫色 那吸收的颜色必为紫色的互补色 (黄色) 然後我就选波长大的 700 8.Which electron on an atom of copper would have the highest value of W in the Boltzmann formula? A) 3s B)3d C)4s D)4p 答案是 b 我毫无头绪-.- 9 Which of the following atoms would be most reactive with water at room temperature? A)K B)Na C)Mg D)Ca E)Li 答案为E 我答案写A 我觉得答案怪怪= =? 10.The color of RS-Hb and O2-Hb are green and red,respectively Which absorbs higher frequency of electromagnetic radiation? 答案为 RS-Hb 我想说 看到绿光 吸收光为互补色红色 (f较小) 看到红光 吸收光为互补色绿色 (f较大) 故我答案写 O2-Hb 11. 比较Na2S K2S Rb2S Cs2S 的 lattice energy 答案为 Na2S>K2S>Rb2S>Cs2S 他是用电荷密度来比较 但我印象中 LE是和"键能"成正比的 水和能才是和"电荷密度"成正比 故我比较他们的离子键强度 推出 Na2S<K2S<Rb2S<Cs2S (有极化现象) 难道我记错了吗?? --

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