作者pai196 (白)
看板TransBioChem
標題[化學] 幾題化學問題
時間Fri Jul 1 20:56:13 2011
最近又到一些化學問題了希望幫忙解惑
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(可以解釋這個單字的化學意義嗎?)
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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◆ From: 211.21.170.212
1F：→ RLCorn:3. paramagnetic 順磁性,總價電子數為奇數個 為順磁性 07/01 20:57
2F：→ RLCorn:因填不滿 有未成對電子 07/01 20:58
3F：→ RLCorn:5.是指為何不是雙鍵嗎? 我在想應該是Be 是 IIA 族 關係 07/01 21:00
4F：→ RLCorn:只有兩個價電子 07/01 21:00
5F：推 jasonfghx:上一篇解釋你看懂嗎?? 07/03 11:25
6F：→ jasonfghx:給點評語吧 07/03 11:25
7F：→ pai196:謝謝你上一次的解答 我都了解了 THKS 07/03 17:15