化學 (科學) | fedest.com

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有關於奈米光觸媒的問題^^

在SARS期間，奈米光觸媒因而成為寵兒..但是使用效果不是很好，這是為什麼呢，SARS是病毒阿?可以給告訴我為什麼嗎^^

2006-12-18 16:18:48 · 1 個解答 · 發問者 Wii 1

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F4 chem anodization問題~~~搵人幫幫我丫~

我想問下點解當做緊anodization of Al ge時候,oxygen會系anode度produce?

2006-12-18 16:07:00 · 1 個解答 · 發問者 Anonymous

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Polystyrenesulfonate
hydtoxypropyl
sulfonate
sultaines
Tallowamidopropyl
Hydroxysultaine
acylated
taurates
Lauroyl
Taurate
Hydrotropes
lncluding
Sulfosuccinamates
sulfosuccinic
membcrs
counterion
Deceth
Dioctyl
monoamide
Stearyl
atoms
thioethers
Cysteine
mercaptans
Thioglycolic
antifungal
lncluded
petroleum
hexadecanoic
tricontanol
Tropsch
cosmetics

2006-12-18 14:59:39 · 1 個解答 · 發問者企鵝小朋友 1

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[ ]化學問題（英翻中）

Alkanolamides
Alkoxylated
ethoxylation
monoisopropanolamine
alkoxylation
hydrolytic
octoxynol
imidazoline
Aryl Sulfonates
hydrotropes
sulfation
triethanolamine
Myristaminopropionate
Alkoxypropyl
Iminodipropionate
alkylated
disubstituted
Glycinate
isethionates
Phenolsulfonate

2006-12-18 14:58:28 · 1 個解答 · 發問者企鵝小朋友 1

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丙烯酸2羥乙酯(2-HEA)的Tg是多少

請問2-Hydroxyl-ethyl Acrylate(2-HEA)
中文名稱是丙烯酸2羥乙酯的Tg是多少?
請知道的人告訴我..謝謝..

2006-12-18 11:57:01 · 2 個解答 · 發問者小瓢蟲 2

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蜂蜜是屬於酸性食物還鹼性食物呢?

如標題~
請問蜂蜜是屬於酸性食物還鹼性食物呢?
還有身體PH值是6是屬於中性還是弱酸呢?
謝謝^^

2006-12-18 10:52:09 · 2 個解答 · 發問者 ? 1

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What does a human being made off

what are the chemical elements of a human being?????

2006-12-18 08:34:49 · 3 個解答 · 發問者 A student 1

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化學問題 ozone

i know in the compound ozone, the structure is bent shape
.............O
............/ \\\\ double bond
......... O O

but why is this wrong?
........... O
...........// \\\\
.........O = O
or they both right?

2006-12-17 22:42:13 · 2 個解答 · 發問者 Rui Lin 1

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請問鹽酸和硫酸水溶液的當量濃度??((急))!!

1.濃硫酸水溶液佔98%
2.濃鹽酸水溶液佔36%

以上1. 2.，其當量濃度各別為何?

2006-12-17 16:57:07 · 2 個解答 · 發問者小嵐 1

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Neutral 的定義是什麼??

Neutral 的定義是什麼?? Equivalence point 等於neutral 嗎??Equivalence point 為什麼不是pH7 ??

2006-12-17 16:46:30 · 2 個解答 · 發問者 riva 1

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chem 問題...........

explain whether the combustion of propane or propene would produce a more sooty flame.

2006-12-17 15:17:52 · 1 個解答 · 發問者 ? 1

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reacting mass 高手快來

Metal X forms an oxide. 27.53g of this oxide contains 24.96g of X. What is the mole ratio of X to oxgen in the oxide?

(relative atomic masses : O=16.0, X=207.0)

2006-12-17 13:44:55 · 1 個解答 · 發問者 kwan 6

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ionic equation of iron

如果題目叫我write an ionic equation for the reaction between iron and silver nitrate solution，咁我點知佢講緊iron(ll) 定iron(lll)?

2006-12-17 10:19:05 · 1 個解答 · 發問者 Anonymous

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chem reactivity

explaini, interms of electronic structure, why calcium is more reative than magnesium?

2006-12-17 10:02:41 · 2 個解答 · 發問者 Anonymous

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ionic equation

write ionic equation for the following reactions :
a) Magnesium + dilute sulphuric acid
b) Iron + silver nitrate solution

2006-12-17 09:19:53 · 3 個解答 · 發問者 Anonymous

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chem acid base equilibrium (III)

Q1: a buffer solution containing 150cm3 0.1M NH3 and 100cm3 0.1M NH4Cl is prepared. Calculate the [OH-] and pH of the solution.
(Kb for NH3=1.8x10^-5)

Q2: To 1dm3 of 0.125M solution of CH3COOH , 0.1 mole of solid NaOH is added. Calculate the pH value of the solution (a) before the addition of NaOH, (b)after the addition of NaOH
(Ka for CH3COOH=1.8x10^-5)

THX A LOT!~

2006-12-17 09:14:13 · 2 個解答 · 發問者 ? 1

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點解calcium唔係group1 metal，但react with water會give out hydrogen?

點解calcium唔係group1 metal，但係react with water都會give out hydrogen gas?

2006-12-17 08:47:25 · 4 個解答 · 發問者 Anonymous

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請問有誰知道何謂磷-31核磁共振(NMR)急需~謝謝..

請問有誰知道何謂磷-31核磁共振(NMR)

以及和他ㄉ原理..

簡單敘述就好ㄌ...不用太深奧

ps:別貼爬文了..很多...看不完...

我只是想簡單知道他大概的原理

因為很急..

所以懇請知道的大大解答一下...

謝謝...

2006-12-17 05:56:46 · 2 個解答 · 發問者胖妞 1

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[ ]化學問題（英翻中）

Sulfosuccinates
substituent
sulfosuccinyl
polyalkoxylated
Oleamide
monoester
diester
ln diesters
solubilizers
Isostearate
Dioleate
Alkylamido Alkylamines
Cocoamphodipropionate
quatemized
imidazoline
Capryloamphodiacetate
substantivity
Aryl Sulfonates
sulfonation
orgnic
alkylbenzene

2006-12-17 04:33:38 · 1 個解答 · 發問者企鵝小朋友 1

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Anodizing and Ionization

what is the difference between anodizing and ionization
give example if u are able to
答中文或english皆可
thx

2006-12-16 17:40:49 · 2 個解答 · 發問者 felixytf 2

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可以幫我查化學式?????(NH3OH)CL-HOCH2.

(NH3OH)CL~~~~~
NaH2po2.H2o~~~~
HOCH2.CH2OH~~~

2006-12-16 10:08:07 · 1 個解答 · 發問者 Anonymous

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請問硝化棉(火綿)，和燒紙成字(我要用硝酸鉀)怎麼做

1.請問硝化棉(火綿)，知道的人步驟可以告訴我
2.燒紙成字，我要用硝酸鉀，請問怎麼做
請高手幫幫忙

2006-12-16 08:13:32 · 2 個解答 · 發問者焜焜 1

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白金同黃金有咩分別?

2006-12-15 22:26:06 · 2 個解答 · 發問者 Kevin 4

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Any websites that include the details of every element?

Any websites that include the details of every element?

From H to Umn

2006-12-15 18:45:30 · 2 個解答 · 發問者 ? 1

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請幫幫忙翻譯化妝品成分

幫幫忙翻譯化妝品成分
Sodium Cocoyl Isethionate , Microcrystalline Cellulose , Sodium Cocoyl Glutamate , Talc , Glucose , Sodium Myristoyl Glutamate , Hydrolyzed Wheat Protein , Hydrolyzed Soy Protein , Papain , Aloe Barbadensis Gel

2006-12-15 16:56:46 · 1 個解答 · 發問者 ? 2

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溶氧控制器的原理說明

溶氧控制器的原理說明
有誰知道幫幫忙
我要做報告但是都找不到原理說明
使用方法也可以

2006-12-15 06:00:23 · 1 個解答 · 發問者有夠悶 1

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(跪求)請問誰知道pY-E-E-I是什麼東西??

請問誰知道pY-E-E-I是什麼東西??
我找了很久都不明白它是什麼..?
它是代表什麼意思呀=.=

2006-12-15 03:57:44 · 1 個解答 · 發問者 Stephen 2

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displacement

KI + Fe2(SO4)3
1.呢個係唔係displacement reaction?
2.點解會有chemical energy轉做heat?

2006-12-14 17:45:25 · 1 個解答 · 發問者 2003 2

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瀿酸 <<< 這個是什麼有人知道嗎?急需

麻煩 ,幫幫忙 , 急需瀿酸是什麼 ? ! << 這個是奶粉成分 !!

2006-12-14 17:31:44 · 2 個解答 · 發問者 °·﹑壞洨孩♂ 1

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dative covalent bond

1.dative covalent bond 係咪一定係share 一對electron?
2.
The dative covalent bond is a type of covalent bond in which the shared pair of electrons is supplied by only one of the bonded atom.
咩叫做bonded atom?
係咪即係lone pair 的electrons?

3.dative covalent bond係咪可以睇成share 一對lone pair 的electron?

2006-12-14 17:08:17 · 1 個解答 · 發問者 2003 2