Uncle Michael

大人

回覆: 1

2008-01-15 3:08 am

chem問題

Man

回覆: 1

2008-01-14 10:19 am

硫化氫是否溶於水

用戶93165

回覆: 1

2008-01-13 7:56 am

Will rusting increase the weight of iron?

CHING WAI

回覆: 1

2008-01-13 8:01 am

Chemistry ---VERY URGENT

[匿名]

回覆: 2

2008-01-08 6:37 am

乙醇 跟 甘油 混在一起, 會不會酯化?

大人

回覆: 1

2008-01-08 4:26 am

chem既問題

³·

回覆: 1

2008-01-06 7:03 am

about mole

³·

回覆: 1

2008-01-06 7:04 am

about mole

可憐的混血王子

回覆: 2

2008-01-01 12:46 am

ph值.............

Wendy

回覆: 1

2007-12-31 6:24 am

Soething about Chemistry

Wing Kei

回覆: 2

2007-12-31 1:20 am

科學問題．．．幫幫手

大人

回覆: 3

2007-12-30 7:32 am

簡單chem問題

用戶7636

回覆: 1

2007-12-29 8:10 am

CHEM...Calculation ..structure

Lai Kuen

回覆: 1

2007-12-24 6:11 am

what is the ppt. when Zn in con. HCl is added to 3 alcohol?

rubbishbin01

回覆: 2

2007-12-14 6:39 am

K與Li的活躍性比較

[匿名]

回覆: 1

2007-12-10 4:00 am

(15分)*相對同位素質素.相對原子質量

llp

回覆: 4

2007-10-29 11:01 pm

我想問鉛是可以用什麼來分解呢??

用戶95787

回覆: 1

2007-10-29 6:21 pm

點解實驗室用的啡瓶叫 「琥珀瓶（Amber Bottle）」 ?

[匿名]

回覆: 1

2007-10-29 9:51 am

Question about paper chromatography

angel

回覆: 2

2007-10-29 2:54 am

Chem~~help!

子路

回覆: 2

2007-10-24 7:42 am

why CO exists?

用戶211686

回覆: 2

2007-10-23 5:16 am

Cl 的oxidation number 不是fix?

[匿名]

回覆: 2

2007-10-22 7:12 am

ethene 的 reaction

しこん

回覆: 1

2007-10-22 12:07 am

ｍｏｌ問題一問

Dulocee15

回覆: 1

2007-10-21 6:49 pm

chem 一問

Dulocee15

回覆: 1

2007-10-21 6:59 pm

Brown bottles??

wa

回覆: 1

2007-10-21 5:47 am

硫代硫酸鈉滴定

Tai Man

回覆: 1

2007-10-21 4:02 am

Chemistry Metal 問題

用戶85377

回覆: 1

2007-10-20 8:48 pm

Two questions

2003

回覆: 1

2007-10-20 2:35 am

tertiary alkanol

[匿名]

回覆: 1

2007-10-14 9:17 pm

元素分類..10點

chanel

回覆: 2

2007-10-14 7:58 pm

chem.濃硫酸

chanel

回覆: 1

2007-10-14 7:15 pm

CHEM,,

fung

回覆: 1

2007-10-13 9:55 pm

a chem question (20分)

Dulocee15

回覆: 1

2007-10-13 7:30 pm

conc. sulphur 一問

用戶198477

回覆: 1

2007-10-11 3:30 pm

點解Cu2+同I-有reaction

[匿名]

回覆: 1

2007-10-11 5:04 am

乙炔分子的碳原子采取什么雜化軌道

恩樂

回覆: 1

2007-10-09 12:35 am

氧化還原反應 (2)

☆ 天 與 空 ★ ◤

回覆: 1

2007-10-07 4:26 am

Question about volume of gas ...urgent ar~

[匿名]

回覆: 2

2007-10-06 1:45 am

觸媒轉化器怎樣運作?

s214973

回覆: 1

2007-10-06 8:55 pm

potassium reacts with water

Kin Long

回覆: 2

2007-10-06 6:55 am

Test for Nitrogen

cecilia

回覆: 1

2007-10-01 6:43 pm

question about the back titration of vitamin C

[匿名]

回覆: 1

2007-10-01 8:26 pm

IQ化學問題

NewBoy

回覆: 1

2007-10-01 2:19 am

potassium permanganate + hydrogen peroxide

☆ 天 與 空 ★ ◤

回覆: 1

2007-10-01 1:03 am

balancing equation between Ag and HNO3

[匿名]

回覆: 1

2007-09-30 6:29 am

如何用MS Word輸入化學元素完整符號(Full Symbol)？？

用戶26058

回覆: 1

2007-09-29 9:09 pm

水 鹼 油

小Ｇ

回覆: 1

2007-09-30 2:31 am

為甚麼冰晶石能降低melting point？

2003

回覆: 1

2007-09-30 3:05 am

balance redox equation