Chemistry - June 2007

Olivine can consist of all Mg no Fe, all Fe no Mg or an intermediate composition of part Mg and part Fe. When an imtermediate composition applies there is the ratio [Fe, Mg]: Si:O2 does this mean that there is always fixed ratio of Mg:Fe or does that part vary? In other words when there is a mixure of Mg and Fe are they always in a fixed ratio to each other?

2007-06-20 00:23:00 · 1 answers · asked by Gideon 1

2007-06-20 00:20:38 · 1 answers · asked by Anonymous

in what site can i find lab tools with its uses and pictures? or can u give me 20 lab tools with its uses?

2007-06-20 00:20:24 · 1 answers · asked by Michi 2

this idea is from a research project from the fourth year highschool students,,,i want to investigate it too with my classmates please help us^^ this is really important

2007-06-20 00:19:06 · 1 answers · asked by Lycanus 2

the system,Unicam ProGC, is being used for analysis of transformer oil (dissolved) gases at our laboratory in conjunction with a gas extraction systemSPEC2952. The gas extraction system was provided by Unicam. i am in search of a detailed procedure for operation of SPEC2952. Pls do forward procedure or a useful link

2007-06-20 00:05:39 · 1 answers · asked by Anonymous

2007-06-20 00:01:20 · 1 answers · asked by ciony_23 1

2007-06-19 23:58:24 · 1 answers · asked by Austeja 2

i need ideas for investigatory project in chemistry.. please think of an idea that is not that complicated because we might have some difficulties in making it.. tnx.. =)

2007-06-19 23:55:50 · 3 answers · asked by angeL 2

atoms

2007-06-19 23:21:44 · 24 answers · asked by Anonymous

molecules

2007-06-19 23:21:15 · 12 answers · asked by Anonymous

bulk particles

2007-06-19 23:18:49 · 1 answers · asked by Anonymous

chemistry in food

2007-06-19 22:51:39 · 1 answers · asked by cutie 1

2007-06-19 20:34:22 · 2 answers · asked by im_shadow46 1

I was thinking about what puts out a fire. Water can, however water is two parts hydrogen and one part oxygen. Oxygen cannot put out a fire, because fires need oxygen. So, that would lead me to believe that Hydrogen puts out a fire. Is that true? If so, is Hydrogen peroxide flamable?

2007-06-19 19:50:01 · 11 answers · asked by Anonymous

2007-06-19 19:49:33 · 2 answers · asked by anduril 1

I need to fog my apartment (again!) for fleas. Foggers usually come in a pack of three. Since I have a small 2-room apt, I only used two from the first pack. I bought another brand with another chemical. So, I just want to make sure that Permethrin (adult killer) and (S)-Methoprene (fogger #1) won't explode when it encounters cypermethrin (fogger #2).

Since the methoprene is a larva-killer, I want to use that in the room where I've kept my cats. I want to use only the adult-killer (cypermethrin) in my bedroom (I didn't let the cats get fleas on my bed again). Of course I'll keep the door between the rooms open to try to get the full effect.

I hope my question makes sense.

2007-06-19 16:45:07 · 1 answers · asked by Joy C 1

I don't know how to do this problem. Can someone help put me on the right path?
calculate the minimum height needed for a column with an hetp of .25cm to obtain benzene of at least 85% purity from a sample of 30%benzene and 70% toluene

2007-06-19 16:42:46 · 2 answers · asked by Kristina D 2

if so, why? im confused!

2007-06-19 16:24:12 · 3 answers · asked by Anonymous

After titration sodium hydroxide with hydrofluoric acid, it is determined tat the reaction had formed an aqueous solution of 0.020mol/L sodium fluoride. Determine the pH of the solution

2007-06-19 16:19:55 · 2 answers · asked by !xobile 1

2007-06-19 16:02:43 · 3 answers · asked by Anonymous

it is better if it is biologically not related thanking yu!

2007-06-19 15:54:33 · 6 answers · asked by Anonymous

Li3N + Al2(CO3)3--------------->Li2CO3 + AlN

2007-06-19 15:51:52 · 3 answers · asked by Anonymous

I came up with 2H(sub2)0(sub2) ----> 0(sub2) + 2H(sub2)0 does this look right?

2007-06-19 15:49:18 · 4 answers · asked by Devin G 2

I am reading the business description of an oil services company, they specialize in the technology to produce light olefins. I'm hoping that someone can tell me what these are in layman terms. Thanks!

2007-06-19 15:45:42 · 1 answers · asked by RickyP 1

Ba+AlCl3----------> 1 BaCl2+ Al

2007-06-19 15:38:30 · 9 answers · asked by Anonymous

2007-06-19 15:36:30 · 3 answers · asked by Johnson 1

Show solutions please

2007-06-19 15:35:47 · 2 answers · asked by ms_janet 1

2007-06-19 15:28:55 · 7 answers · asked by Anonymous

I am trying to understand intermolecular forces a bit better and how they are related to boiling points. Which of the following should have the highest boiling point and why?
- CF4
- CCl 4
- CBr4
- Cl4
- CH4
Thanks!

2007-06-19 15:28:30 · 1 answers · asked by sundance_0083 2

2007-06-19 15:19:24 · 1 answers · asked by ms_janet 1