Chemistry - November 2007

2007-11-28 23:02:50 · 2 answers · asked by Amy 1

2007-11-28 23:00:35 · 6 answers · asked by Anonymous

There doesn't appear to be anyone selling ignition fuses on Ebay, where else can I buy either rolls or strips of fuse?

Have these fuses got a specific name that I should know about?

2007-11-28 22:35:02 · 4 answers · asked by zyckle 1

2007-11-28 22:22:12 · 43 answers · asked by ashi 1

i need the detailed process of air seperation for oxygen plant ...

2007-11-28 21:55:08 · 4 answers · asked by Anonymous

Calculate the number of moles in 37.8mL of 1.5M HCl and express the answer with the correct number of significant digits.

Can someone show me how to do this?

2007-11-28 21:54:38 · 4 answers · asked by Chris #326 1

For the reaction N2(g)+3H2(g) = 2NH3(g)


Kp = 5.60×10−3 at 258 degrees C. What is the K for the reaction at this temperature?

2007-11-28 21:42:58 · 5 answers · asked by Anonymous

2007-11-28 21:39:47 · 1 answers · asked by thaha t 1

We did the conservation of mass acctivty.
My qeustions are that...
1. How come bodns were not included in the mass?
2. How come this reaction needed 2 oxygen molecules and water moleculres but only 1 of the others?
1). 1ch4+2o2
2).2o2

1. 1co2
2. 2 o2 molecules

2007-11-28 21:18:36 · 1 answers · asked by angel 2

there is a population problem.... everyone knows it

2007-11-28 20:28:52 · 26 answers · asked by Anonymous

The following are beta emitters. Write the reactions produced in each case:

1. Carbon-14
2. Strontium-90
3. Potasium-40
4. Nitrogen-13

The following are alpha emitters. Write the reactions produced in each case:

1. Uranium-238
2. Thorium-230
3. Uranium-235
4. Radon-222

Polonium 214 decays when it loses an alpha particle. Write the nuclear equation.

Argon-39 decays to become Potassium-39. Write the nuclear equation.


If somebody could just explain to me how i'm supposed to find the answers for these then that would be great.

2007-11-28 19:05:48 · 1 answers · asked by emando16 2

2007-11-28 17:48:53 · 8 answers · asked by joe l 1

2007-11-28 17:34:56 · 1 answers · asked by Mangesh N 1

Please help me identify which reaction occurs in the Diet Coke and Mentos experiment.

chemical?
physical?
or
exothermic?

please help!

2007-11-28 16:08:53 · 23 answers · asked by Tami N 2

2007-11-28 16:05:05 · 7 answers · asked by lalaworld 1

i need it quick hurry!!!! its for my science project

2007-11-28 15:35:20 · 2 answers · asked by Anonymous

2007-11-28 15:31:27 · 1 answers · asked by Anonymous

2007-11-28 15:21:41 · 2 answers · asked by Anonymous

Also known as paraffin oil, liquid paraffin or unscented baby oil. I need it to submerge a computer in.

Alternatively, I need a commonly available clear liquid that is non conductive, doesn't dissolve anything associated with computer components, and preferrably doesn't freeze above -30 degrees celsius.

2007-11-28 15:17:33 · 1 answers · asked by Anonymous

what is the melting and boiling point?
is it a medal? wat family it belong to

2007-11-28 15:16:59 · 3 answers · asked by jeanah m 1

we did this reactions lab and watch the chemical reaction,
what are 3 sources of experimental error and how it could affect your results?

all i could think of is contamination, i need two more!

2007-11-28 15:14:30 · 4 answers · asked by Anonymous

just a procedure will do

thanks a lot!

2007-11-28 15:07:45 · 3 answers · asked by coolchic 3

2007-11-28 15:05:19 · 5 answers · asked by To-the-Stars 4

like other elements, water, or air. Give me links please.

2007-11-28 14:35:11 · 1 answers · asked by Jack Lapidus 4

i have a final tomorow and one of the things i need to know is:
How pure metals are obtained and calculate % metal in ore.

please explain, and a site or example will help TY

2007-11-28 14:30:43 · 1 answers · asked by mzmadel 2

Write a balanced equation for each of the following reactions. Then classify each as: synthesis (S), decomposition (D), combustion (C), single displacement (SD), or double displacement (DD).

____1. Solid iron(III)hydroxide breaks into solid iron(III) oxide and water vapor when heated

Balanced equation:

____2. Ammonia gas (NH3) plus sulfuric acid yields aqueous ammonium sulfate.

Balanced equation:

____3. Magnesium and nitric acid react to produce and aqueous solution of magnesium nitrate and hydrogen gas

Balanced equation:

____4. Solid calcium nitrate reacts with hydrochloric acid to create nitric acid and aqueous calcium chloride.

Balanced equation:

2007-11-28 14:14:15 · 1 answers · asked by pegasus_puck 4

Appreicate it if someone could show me how to work the following problem: Thanks alot!

Knowing that the label for entropy is J/mol K determine the entropy of vaporization of methanol. THe boiling point of methanol, CH3OH, is 64.6 degrees C and the enthalphy of vaporization is 35.21 mol.


(K = C + 273)

2007-11-28 14:13:20 · 1 answers · asked by a_chamarthy 2

Hi there,
I'd like to ask for help on balancing calcium hydroxide + aluminum chloride. What is the formula for the first part? Any help will be greatly appreciated. Thanks.

2007-11-28 14:11:19 · 4 answers · asked by Quasar 2

CH3CH2CH2CH2OH -----> CH3CH2C[triple bond]CH

I need a multistep synthesis :) I'm a little lost on the terms still - I kinda get what I'm doing, but when it comes to what reagents remove what- I'M COMPLETELY LOST - so explainations on what it's doing to the compound would be great!!!!

thanks!

2007-11-28 14:05:55 · 3 answers · asked by Anonymous

does Chemical engineering have a good part in a company??

what chemical engineering can do in a company??
what kind of job can chemical engineering get in the company?


please list as much as possible..

thank you..

2007-11-28 13:51:31 · 3 answers · asked by ideasodabsbskla 2