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Please help, urgent...

Please help, urgent...# ChemEng - 化学工程

f*m2008-07-06 07:07

1 楼

有几道题目，今天due, 请大家帮忙解答，非常感谢。。。
一直都是学文科的，所以这些问题可能大家会觉得很简单，先谢谢了。。。
1. explain why it is unlikely that an organic molecule would have an odd
number of valence electrons.
2. which contains more ions, 1 mol of ammonium sulfate or 1 mol of potassium
phosphate? Why?
3.Which sample contains the lagest number of ions?
a. 1 mol NaNO3
B. 1 mol Fe(NO3)2
C. 1.5 mol AgNO3
D. 1.5 mol SnCl2
E. 1 mol (NH4)3PO4

s*92008-07-06 07:07

2 楼

organic molecule is always built up by C,O,N, (S, Si,B),H, which are all non
-metal elements.
They tend to form valent bonds, which just allow 2 e- for each bond.
potassium
potassium phosphate.See chemical formula
B=C (if all ionized)> A

【在 f********m 的大作中提到】

: 有几道题目，今天due, 请大家帮忙解答，非常感谢。。。
: 一直都是学文科的，所以这些问题可能大家会觉得很简单，先谢谢了。。。
: 1. explain why it is unlikely that an organic molecule would have an odd
: number of valence electrons.
: 2. which contains more ions, 1 mol of ammonium sulfate or 1 mol of potassium
: phosphate? Why?
: 3.Which sample contains the lagest number of ions?
: a. 1 mol NaNO3
: B. 1 mol Fe(NO3)2
: C. 1.5 mol AgNO3