F.4 Chemistry "Reacting mass" 問題(1)

(b)the number of moles of ammonium ions NH4+ = the number of moles of ammonium carbonate (NH4)2 CO3 x2
=0.1x2= 0.2mol.
(c)the number of moles of carbonate ionsCO3 2- =the number of moles of ammonium carbonate (NH4)2 CO3=0.1mol
(d)the number of moles of hydrogen atoms H =the number of moles of ammonium carbonate (NH4)2 CO3=0.1x8=0.8mol
Since the question asks that the number of moles of those ions or atoms inside the compound(NH4)2 CO3, so use the mol concept but not the equation to solve it.The compound just likes a bag , if these is a bag, 5 atoms are there,so how many atoms are in 2 bags? Just 10 bags.As 5X2=10.

2007-01-18 19:07:15 補充：
呢類數用一分鐘要做完，所以好少分。唔係好難，用mole concept, 唔明再問。我中五架。

2007-01-18 19:10:02 補充：
你兩位好似係度傾計咁ge...

2007-01-18 19:36:57 補充：
因為1mol 的(NH4)2 CO3 內，有兩個NH4-咁多，即係話 NH4-:(NH4)2 CO3=2:1。好似一粒(NH4)2 CO3裏面就有兩粒NH4 -，即係1mol有兩mol NH4 -啦！

2007-01-18 19:42:21 補充：
我係岩岩學mole concept果陣都覺得好難，直情難到想死，根本唔明佢講乜。但係之後係咁計，唔識，再計，唔識，再計，問人又唔明，再問，問問下，好似開始識識地。雖然宜家我對mole都唔係咁熟，但係就起碼明佢講乜多左！

2007-01-19 17:37:45 補充：
If I am right, please choose me as the best . Thanks.

2007-01-20 14:18:01 補充：
回樓上那位：首先，我無講過the number of moles of ammonium ions NH4 = the number of moles of ammonium carbonate , 我只係講過the number of moles of ammonium ions NH4 = the number of moles of ammonium carbonate x2.同埋佢根本就唔駛咩equation都計到，因為只係普通ge mole concept.一粒ammonium carbonate內面有兩粒geNH4- 呢樣係人都先，所以呢個mole ratio係2:1.

2007-01-20 14:20:12 補充：
呢d數咁簡單，又易拎分，所以無人會因為答呢d題目拎到高分。我拎呢d分最多同最高個幾個鬥，你合格只係基本水平，如果有心讀，根本chem好難唔及格。

2007-01-21 13:25:17 補充：
過獎。

冇其他 information?
如果係冇, 計唔到 wor!!!!!

2007-01-18 18:57:06 補充：
佢有冇 1條 equation比你呀? 應該唔會咁少野!!!!

2007-01-18 19:05:53 補充：
真係計唔到 wo!!!你寫埋個 ans. 出黎睇下!!!!

2007-01-19 19:07:53 補充：
回樓下果位人兄: 都冇個 chemical eqt!你點知 the number of moles of ammonium ions NH4 = the number of moles of ammonium carbonate 跟本就唔得 ge! 除非有條 eqt la~仲要 balance埋先 ok~依 d計數最易拎分!又直接, 所以拎分係最易!!!我考試都係計依 d數, 令到我合格 ge~