作者clearfray (老虎奶油)
看板TransBioChem
标题[化学]
时间Mon Jun 22 13:27:44 2009
Consider the following molecules,
I. H2CH2 II.H2CCH2 III.H2CCCH2 IV.H2CCCCH2
Which of them will have all the hydrogen atoms lying on the same plane?
a.II only b.II and IV c. II and III d. II,III and IV
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我选B 不知道对不对?
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The molecule Be2 is found to be a stable molecule, whereas He2 is
unstable. The major reason is because
A. Be2 has more empty molecular orbitals than He2
B. Be2 has less empty molecular orbitals than He2
C. The stabilization due to the s-p mixing in Be2
D. The destabilization due to the s-p mixing in He2
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这题我以为Be2和He2都不存在耶~BO不是等於零吗@@ 请教大家了!
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Which of the following species have the lowest LUMO(Lowest Unoccupied
Molecular Orbital)?
a. H2O b. H+ c. CH3COO- d. CH4
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有点不懂题目的意思,是选最容失去电子的(最酸的?)
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最後想请教要怎麽判断一个物质有optically active 呢?
以上! 先谢谢大家了!
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.129.77.5
1F：→ missass:你第一个问题选项C又打错了= =... 06/22 18:10
2F：→ missass:D也错ㄌ... 06/22 18:10
3F：→ mimipig:= = 06/22 18:19
4F：→ clearfray:那个...我不懂打错了是什麽意思耶= ="题目真的是这样... 06/22 18:28
5F：→ missass:BD选项一样，C的答案是"II and II" 06/22 19:47
6F：→ missass:你的书不会也是张晋他们的吧...= =|||| 06/22 19:49
※ 编辑: clearfray 来自: 140.129.77.5 (06/22 20:09)
7F：→ clearfray:噢谢谢指正!我不是写他们的书耶~纯粹是自己眼残⊙▽⊙ 06/22 20:11
8F：→ missass:请问你是用哪家的书阿~我想参考用><感恩~!! 06/22 20:20