回复：It has to be caused by the size of S and O

Sulfa is much bigger than oxygen, which allows more room for protons. The 100 degree in H2O is caused by the repelling of two partially positive charged protons.

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• perfect answer！ -释放它的美- ♀ (463 bytes) () 09/26/2012 postreply 00:02:29

• if it caused by2个氢原子发生排斥, why not 180degree? -xyz100- ♂ (0 bytes) () 10/12/2012 postreply 16:39:51

• 回复：p 轨道之间的夹角是90度 。 -NaCl- ♂ (0 bytes) () 10/15/2012 postreply 21:00:21