Chemistry - September 2006

2006-09-28 07:53:08 · 4 answers · asked by Anonymous

2006-09-28 07:07:31 · 2 answers · asked by Anonymous

i'm having a hard time w/ our project in chemistry...plz..i need ur help..i need some ideas...
we are required to make a device out of indigenous materials..a device that can filter out a (detergent/bath)soap solution into clean water that can be used again...4 washing dishes,hands...
what are some of the uncommon but practical processes can i use?
-i've heard about reverse osmosis...but how can a freshman student lyk me do such stuffs...they say its hard..
here are also some of the things that i've researched:
-electrocoagulation - too complicated ..i think it uses electricity
-coagulation
-the use of calcium carbonate ..
i hope you cud help me guys..plzzz..

tnx in advance...

2006-09-28 06:31:36 · 6 answers · asked by art 1

2006-09-28 06:02:30 · 7 answers · asked by Anonymous

2006-09-28 05:30:15 · 13 answers · asked by Lex P 1

2006-09-28 05:23:32 · 13 answers · asked by flamehooves 1

2006-09-28 05:23:31 · 9 answers · asked by s365dhr 1

2006-09-28 05:18:59 · 6 answers · asked by weesoph92 1

2006-09-28 05:08:40 · 6 answers · asked by nst 1

2006-09-28 05:05:55 · 3 answers · asked by Anonymous

2006-09-28 05:04:45 · 3 answers · asked by Anonymous

where does coke come from ?

2006-09-28 05:04:02 · 5 answers · asked by keg 3

2006-09-28 04:58:11 · 2 answers · asked by d¿젹 1

Each atom of element 112 lasted only 240 microseconds.

I'd like to know how they could realize the chemical and physical properties of that element in such short amount of time?

2006-09-28 04:27:34 · 4 answers · asked by farshicago 2

2006-09-28 04:22:24 · 4 answers · asked by jacob 1

2006-09-28 04:20:37 · 6 answers · asked by Limeboy 1

There are plenty of answers available about the tongue map and the five basic flavors, as well as the cerebral process involved. However, what I want to know is the material property in food that can be percived by the tongue. At what level is sugar different from salt, coffee different from lemmon? Please exemplify.

2006-09-28 04:04:34 · 4 answers · asked by tasty 1

2006-09-28 03:57:08 · 13 answers · asked by Limeboy 1

Explain the following observations:

1. Barium chloride is added to potassium chromate(K2CrO4). Yellow ppt. formed.
(this mixture is separated into 3 test tubes for part 2 - 4)

2. 6M HCl is added to the mixture above, the ppt dissolves to form a yellow solution.

3. 3M H2SO4 is added to the mixture, no visible change, ie the ppt does not dissolve.

4. 6M HNO3 added to the mixture, ppt dissolves to form a yellow solution.




I need to explain the observations in terms of the equilibrium equations, Le Chatelier's Principle, etc. Also, im not sure of whats going on in the tube, and why doesnt sulfuric acid dissolve the ppt while the other two acids can? Thanks for your help!

2006-09-28 03:18:05 · 3 answers · asked by Noel 4

in modern society

2006-09-28 03:11:10 · 2 answers · asked by Roger A 1

2006-09-28 02:41:05 · 6 answers · asked by Anonymous

why does water not form in a room for example

2006-09-28 02:40:38 · 9 answers · asked by Gerry 1

2006-09-28 02:38:55 · 7 answers · asked by Anonymous

please help me

2006-09-28 02:19:14 · 4 answers · asked by flaca_cool_000 1

please help me

2006-09-28 02:18:02 · 4 answers · asked by flaca_cool_000 1

I see laboratory 'grown' diamonds and other gems for sale out of Russia. Are they chemically identical to ones mined from the ground? I see the hardness for the diamonds listed as '8.5-9.0' instead of 10 which suggests they aren't . Are they better(as in closer to the real thing) than CZ?

2006-09-28 02:00:13 · 7 answers · asked by AmigaJoe 3

Define aqueous and non aqueous solutions AND give atleast 10 examples for each catagory and give their chemical formulae

2006-09-28 01:32:53 · 6 answers · asked by cool 2

2006-09-28 00:26:48 · 38 answers · asked by Anonymous

I think the skull has been in the desert sun for a lot of years. It looks like "toast" colour. I would like to make it white but i dont want to use paint. Should i use bleach? for how long?
Thanks

2006-09-28 00:08:27 · 6 answers · asked by modernromantics 1

2006-09-27 23:34:19 · 12 answers · asked by jboxman7 2