Chemistry - March 2007

2007-03-18 00:32:17 · 6 answers · asked by Anonymous

I am doing on a project on heat transfer fluid. Then i realise stream is commonly used for heat transfer fluid. Why is this so? is it becos it cheap or any other purposes? Guys out there if u have any website strongly link to stream to let me know. Would like to research on it more? any comment on stream is very much appricepated. Thanks,

2007-03-18 00:25:06 · 3 answers · asked by Student 1

1. Kinds and uses of small nuclear RNA
2. Why does pseudogene exist?

pls give me websites or the answers.
ive been browsing it in the net for weeks, but i couldnt find a direct answer. thank you!

2007-03-18 00:08:55 · 1 answers · asked by ~desa~ 4

i need a research topic about anything in organic chemistry... better if it is an application of certain topics...pls..i really need help..

2007-03-17 23:58:56 · 3 answers · asked by gcel 1

also what do these T and D stand for?

2007-03-17 23:58:48 · 3 answers · asked by VÄINÄMÖINEN 2

2007-03-17 23:21:39 · 14 answers · asked by Anonymous

2007-03-17 23:05:34 · 2 answers · asked by oger1901 1

Ph is always positive. But we put 2 moles of HCl in one liter of water and assume that all the acid gets dissolved, we get the Ph = -log [2] which is negative.

2007-03-17 23:05:26 · 3 answers · asked by Anonymous

2007-03-17 22:43:00 · 4 answers · asked by reginal c 1

2007-03-17 22:38:44 · 4 answers · asked by Anonymous

if possible the colour when teh indicator is pheonl red an dthe colour it is changed to when universal indicator is used.

2007-03-17 21:46:02 · 1 answers · asked by Anonymous

Please show how to work out the problem? I don't want just answers.

2007-03-17 21:41:27 · 3 answers · asked by christaglo 2

2007-03-17 21:41:19 · 4 answers · asked by Anonymous

2007-03-17 21:35:33 · 2 answers · asked by Aaron C 1

1) As Quartz has the formula Si02 does this mean that impurities are not part of the lattice structure? What I don't understand is how can it have the formula Si02 even though it is not completely pure. Ti, H20 or Fe can be found as trace elements yet they are not part of the formula. If we take Biotite for example it comprises several end members which are reflected in its formula. The same applies for Olivine (Fe,MgSi04). Why is quartz not shown as say (Fe,Ti,Sio2)?
2) Is quartz completely covalenty bonded becuase it is so strong?

2007-03-17 21:27:54 · 3 answers · asked by Gideon 1

2007-03-17 21:12:34 · 8 answers · asked by Anonymous

Is glucose in egg white?? Can someone please tell me!!
I'm doing my science project on nutrients, so if you know the answer PLEASE HELP!!!!
Thanks!!!!

2007-03-17 21:08:59 · 4 answers · asked by KMC 1

element -- oxygen, iron, sulphur........
compound -- water, salt, carbon dioxide........
mixture -- salt solution, air, soil.........

(This is what I've known, but how about glass, egg, soap......?)

2007-03-17 20:55:18 · 3 answers · asked by English Learner 2

2007-03-17 20:42:55 · 2 answers · asked by christaglo 2

2007-03-17 20:29:07 · 2 answers · asked by Anonymous

Is the gas at all related to the liquid? If so, why is it so harmless as a liquid and harmful as a gas? If they're not related, why do they have the same name? I'm not trying to be stupid, I just know nothing about chemistry.

2007-03-17 20:23:50 · 4 answers · asked by lb 3

I understand that water consists of molecules of Hydrogen and Oxygen. Both of these are flammable gases, yes ? Why then doesn't water burn if we apply fire to it ?

Secondly, why does this compound called water put out fires rather than increase their intensity ?

2007-03-17 19:55:10 · 9 answers · asked by democracynow 2

I am a student, and the chem teacher gave us this mystery to solve. What is the explanation for liquid gasoline not being able to burn?

I know that it can burn in the gaseous state.

Help!

2007-03-17 19:52:30 · 6 answers · asked by chem-mystery 1

2007-03-17 19:44:25 · 1 answers · asked by Anonymous

2007-03-17 19:33:50 · 2 answers · asked by princess_lovessmiling 1

1. Javier need to titrate 2.87g Mg(OH)2. How many milliliters of 0.128 M HCl will he need to neutralize it?

2. Chim performs a titration using a solution of 2.0M HCl and NaOH with an unknown concentration. If 15.0 mL of the acid is needed to neutralize 25.0mL of the base, what is the molarity of her unknown NaOH solution?

Can you please explain the steps!

2007-03-17 19:12:10 · 3 answers · asked by Azumi 2

2007-03-17 18:55:26 · 2 answers · asked by fAtiN hAsEgAwA 1

2007-03-17 18:51:17 · 12 answers · asked by Anonymous

2007-03-17 18:48:47 · 11 answers · asked by princess_lovessmiling 1

2007-03-17 18:21:11 · 6 answers · asked by Malfoy vs Potter 5