雖然未知咩分
但要多謝啊sir先
啲片幫到我好多 平時又肯答我啲問題
今日都叫盡力用到你教嘅嘢
Thanks a lot
化學艾維斯2018-04-23 14:25:08
5*今年預佢around 80%
Isee比利古達2018-04-23 14:25:15
好智障 MC 二題incorrect 同correct 調轉
兩萬蚊杯水2018-04-23 14:25:31
加NaOH 加HCl eg Na2O react with HCl, pH of solution deceases, showing alkaline property of the oxide + eqt 我係咁寫 之後成題最尾加多句 ionic oxides are basic oxides, covalent oxides are acidic oxides, Al2O3 is amphoteric