Chemistry - August 2007

How to derive rate-constant for a second order reaction when the concentration of reactants are are - (1)equal (2) unequal
Can you please derive it for me? It's an assignment & I just have 12 hours left.Please! Thanks!

2007-08-04 18:17:26 · 2 answers · asked by whatever 2

2007-08-04 17:51:43 · 7 answers · asked by vivek b 1

self explainitory

2007-08-04 17:21:48 · 3 answers · asked by Andy Terror 2

2007-08-04 16:59:06 · 1 answers · asked by shunalr 1

All my friends in Thailand tell me that Thai gold is far superior to the gold we use in the west. Their gold is more pure, closer to 100%. Even our top gold doesn't come close to theirs.
Is this true? Their gold seems to be a lot darker than ours.
Anybody know the truth??

2007-08-04 16:04:11 · 9 answers · asked by yanni 2

Which is a more powerful explosive TNT or Dynamite?

2007-08-04 15:46:17 · 9 answers · asked by goldnboyroy 2

2007-08-04 15:04:24 · 4 answers · asked by Anonymous

2007-08-04 13:59:22 · 5 answers · asked by daniel a 1

2007-08-04 13:58:18 · 5 answers · asked by mgail123 1

M=molarity m=millimole

07M=________mM________microM

2007-08-04 13:54:43 · 2 answers · asked by Austin B 1

I need a chemistry diagram of a latex molecule, from the type of latex they use in balloons. I have looked all over the net, but not successfully found one. Please help!

2007-08-04 13:44:40 · 1 answers · asked by J K 2

I decided to clean my room with mouthwash. Inhalation of crest pro-health minty mouthwash for 15 minutes is it poisonous?Inhalation of Cetylpyridinium Chloride they said it is poisonous.Please help!!!

2007-08-04 12:24:52 · 1 answers · asked by Anonymous

This is a my son's science project. and i would just like to help him out..

2007-08-04 07:52:55 · 2 answers · asked by Mat's mom 1

really stuck, answers would be great! thanx!

2007-08-04 07:19:51 · 2 answers · asked by Anonymous

stone-solid state
water-liquid state
CO2-gaseous state
what about FIRE???

2007-08-04 06:21:45 · 9 answers · asked by chamu 1

2007-08-04 06:09:32 · 3 answers · asked by shahbachas 1

2007-08-04 06:07:44 · 2 answers · asked by mae a 1

2007-08-04 05:32:52 · 1 answers · asked by Anonymous

if you were asked to guess the density of a human body, what number would you give? what common experiences can you draw on to help you with your guess?

thanks to those who answered!

2007-08-04 03:33:47 · 7 answers · asked by Annie 1

A 0.4 kilogram sample of Aluminum at 100 degrees Celsius is put into a container containing 0.5 kilograms of water at 20 degrees Celsius. Neglecting the small amount of energy absorbed by the container and knowing the specific heat of Aluminum 900 kJ/kg*C is and the specific heat of the water is 4186 kJ/kg*C answer the following question. Compared to the heat liberated by the aluminum, the heat absorbed by the water is…

2007-08-04 03:07:25 · 1 answers · asked by Anonymous

I'm not sure what they are, can someone please give me a few examples of what they could be?

thanks

2007-08-04 02:55:52 · 1 answers · asked by Anonymous

Please give me the group of hydrogen. I am writing a book so I need to classify it correctly.

2007-08-04 00:57:42 · 12 answers · asked by alan 2

2007-08-04 00:39:55 · 6 answers · asked by Anonymous

I'm using this to make a flea shampoo for animals.

2007-08-03 20:55:55 · 6 answers · asked by kean 1

And I know the dangers, aka i don't need any warnings from mom

2007-08-03 17:19:20 · 5 answers · asked by Anonymous

I'll give you the question first and I'll show you what I came to....sooo....

A buffer solution is prepared by dissolving NaA and HA in pure water. The Sum of the molarities of NaA and Ha is 2.25 and the pH is 7.50. The Ka for HA is 3.0 x 10^-8. Calculate the molarities of NaA and HA in the solution.
_______________________________

HA + H_2O <=> H_3O^+ + A^- (*NaH*)

pH = pka + log [ A^- / HA]
pka = log^(-Ka) => pka = log^(-3 x 10^-8)
pka= 1

7.50 = 1 + log [ A^- / HA]
6.50 = log [ A^- / HA] => 10^6.5 = [ A^- / HA]
[ A^- / HA] = 3.162 x 10^6
[A^-] + [HA] = 2.50
x + x = 2.50?

then I get lost in translation.... please help.

2007-08-03 15:00:21 · 2 answers · asked by Catcher InTheRye 2

I know real jewelry is made of gold and a bit of copper to make it hard.

But what is in fake jewelry???

2007-08-03 14:47:14 · 2 answers · asked by Matt21 3

I am going into my Sophomore year of high school and am scared of taking Chemistry. Is it really hard?? I am not taking honors or AP or anything but I realize most people take it there Junior not Sophomore year and it is making me nerovus.

Note: I am a girl not a guy I'm just using my dad's username

2007-08-03 13:30:04 · 13 answers · asked by ? 2

A sample of SO2 gas which weighs 0.81 grams has a volume of 1.20 liters when collected at 25 degrees celisus.What would be the pressure of the gas sample?

2007-08-03 12:57:07 · 3 answers · asked by Anonymous

I will use this for my thesis in chemistry,,,i hope that u can help me
tenks to all...

2007-08-03 12:50:09 · 2 answers · asked by chelzy y 1