furuta027

Piggirlvincy

回覆: 1

2008-11-06 1:58 am

我有d chem 唔識啊 , 大家可唔可以教吓我啊8

蘇妮阿姨

回覆: 4

2008-11-06 8:41 am

純氫氧化鈉

[匿名]

回覆: 2

2008-10-24 4:39 am

Why is hydrogen bond stronger than Van der Walls force?

yau

回覆: 1

2008-10-25 4:49 pm

盧塞福點解用金箔做實驗?

[匿名]

回覆: 2

2008-10-28 2:39 am

煲水煲得耐有毒嗎

rubbishbin01

回覆: 1

2007-12-12 7:08 am

為何在ecs找不到NO3-+2H++e- NO2+H2O

osiris

回覆: 2

2007-11-30 4:18 am

有關phosphoric acid問題，

osiris

回覆: 2

2007-11-30 4:24 am

OH- and Cl-

michelle_wanghk

回覆: 3

2007-12-07 1:34 am

how to test water with salt?

susanwwh

回覆: 2

2007-06-26 1:30 am

什麼是螫合物 (chelated mineral)?

uless

回覆: 1

2007-03-18 9:43 pm

食糖係咪有助減壓嫁??

[匿名]

回覆: 1

2007-03-11 9:18 pm

0.5% 檸檬酸約是 pH 值幾多?

[匿名]

回覆: 2

2007-03-08 9:29 pm

煲紅茶五分鐘後, 紅茶的茶色素還有沒有光合作用?

[匿名]

回覆: 3

2007-03-15 2:32 am

用王水將化金後,點先可以收回足金呢

[匿名]

回覆: 1

2007-03-08 2:31 am

酒精加醋酯分後, 會不會不具去油脂的能力?

[匿名]

回覆: 1

2007-03-08 2:40 am

酒精擦上皮膚, 會不會令到部份油脂消失於皮膚?

simon

回覆: 1

2007-03-06 9:31 pm

chemical doubts , thx for your help very much

用戶20667

回覆: 1

2007-03-06 11:34 pm

氧化鐵 顏色?

玉儀

回覆: 6

2007-03-06 12:02 am

點解鹽在熱水溶得快過凍水??????????

怡文

回覆: 2

2007-03-04 2:45 am

化學一問...........

Dorothy

回覆: 1

2007-02-26 7:58 am

「用已先行標定之0.1N氫氧化鉀溶液滴定...」

jason

回覆: 1

2007-02-27 3:43 am

Need titration? if same vol+conc. of HCL, NaOH mix together

[匿名]

回覆: 1

2007-02-27 9:17 pm

Redox reaction(氧化還原)係唔係一定exothermic(放熱)?

ckt_hide

回覆: 4

2007-03-01 7:05 am

濃硫酸係咪可以製造氫氯酸同埋硝酸?

[匿名]

回覆: 2

2007-03-02 9:32 am

我想買硝酸鉀,硝酸銨

用戶92097

回覆: 1

2007-03-03 6:21 am

氨+水問題 !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

[匿名]

回覆: 1

2007-02-26 12:28 am

CHEM QUESIONS..急!!

用戶33460

回覆: 3

2007-02-21 4:53 am

redox問題

[匿名]

回覆: 2

2007-02-21 4:05 am

如何減少一個受酸雨影響的湖 中的酸性水?

STEVIE-G™

回覆: 2

2007-02-18 12:34 am

化學會考題iii

用戶92111

回覆: 3

2007-02-20 6:09 pm

Chemistry)**(

[匿名]

回覆: 2

2007-02-20 9:39 am

concentration of solution URGENT

[匿名]

回覆: 2

2007-02-20 11:49 am

肉桂醛，丁酸戊酯，水楊酸甲脂，香芹酮的化學成份

tcn

回覆: 4

2007-02-20 2:16 pm

help!!!!電解nacl

KK

回覆: 2

2007-02-20 12:07 pm

reaction in high temp, 一定唔係endothermic/exothermic reaction?

secret

回覆: 3

2007-02-15 1:27 am

關於chem的幾條會考MC,,麻煩大家幫幫手

Joanne

回覆: 2

2007-02-16 12:01 am

化學......

Man Ting

回覆: 4

2007-02-16 7:50 am

勁急!12:15前答!!!旺角到上水最快方法~!10分~!

用戶107609

回覆: 2

2006-12-06 5:17 am

中一科學,,好易~~~~~~

Peng

回覆: 1

2006-12-06 5:45 am

發酵法制取醇(10分)

kARMEN`

回覆: 5

2006-12-06 6:01 am

點解水銀mercury係液體? (最佳答案可得20分!)