Mole~!!!!!!!!!!!!!!!!

2006-12-18 3:36 am
One mole of calcium bromide contains

A.1 mole of molecules.
B.2 moles of cations.
C.2 moles of anions.
D.3 moles of atoms.

為什麼不是D??Ca(Br)2不是有1mole of Ca和 2moles of Br的atom嗎?加起來不是3 mole of atom嗎?

回答 (2)

2006-12-18 4:43 am
✔ 最佳答案
再嚴格少少黎講, 點解D唔岩呢,
因為你隻野入面果d係ion, 唔屬於atom, 因為佢地帶charge.
atom is electrically neutral.
參考: me
2006-12-18 4:29 am
我本書都有呢條問題ga...
我最初都係同你一樣ans ga...
Ca(2+)+2Br(-1)=CaBr2
因為佢有2個bromide ion,
所以係2moles of anion。
Ca係2+,所以要2個Br1-先可以平衡。


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