作者pai196 (白)
看板TransBioChem
标题[化学] 几题化学问题
时间Fri Jul 1 20:56:13 2011
最近又到一些化学问题了希望帮忙解惑
1.What molecular structureal features cause high-density polyethylene to be
denser than low-density polyethylene?
2.what molecular feature must a molecule have to participate in hydrogen
bonding with other molecule of the same kind?
3.Determine the CN, CN-, CN+.caculate the bond order for each ,and indicate
which one are paramagnetic(可以解释这个单字的化学意义吗?)
4.Why do surface tension and viscosity decrease with increasing temperature?
Why do substance with high surfave tensions also tend to have high viscosity?
5.why do not we draw doubles between the Be atom and the Cl atoms in BeCl2?
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 211.21.170.212
1F：→ RLCorn:3. paramagnetic 顺磁性,总价电子数为奇数个 为顺磁性 07/01 20:57
2F：→ RLCorn:因填不满 有未成对电子 07/01 20:58
3F：→ RLCorn:5.是指为何不是双键吗? 我在想应该是Be 是 IIA 族 关系 07/01 21:00
4F：→ RLCorn:只有两个价电子 07/01 21:00
5F：推 jasonfghx:上一篇解释你看懂吗?? 07/03 11:25
6F：→ jasonfghx:给点评语吧 07/03 11:25
7F：→ pai196:谢谢你上一次的解答 我都了解了 THKS 07/03 17:15