Chemistry - July 2007

2007-07-04 10:09:47 · 1 answers · asked by patrick o 2

2007-07-04 06:33:24 · 2 answers · asked by Maddie Z 3

2007-07-04 06:20:20 · 18 answers · asked by priyanka 1

I am an amat gold prospector and found that a mix of regular table salt and venegar makes a good cleaning solution for small (tiny) amounts of ore.

I have placed a small amount of ground ore into a solution of salt and vinegar and then added a very small amount of mercury to help retrieve the gold particles.

What I am seeing is that over time, gas bubbles appear on top of the blob of mercury.

Anyone have an idea of just what kind of reaction is going on here? Is this something I should be concerned with?

BTW, the solution, ore, and mercury are in a well sealed vial.

2007-07-04 05:20:18 · 1 answers · asked by afreshpath_admin 6

2007-07-04 05:12:48 · 4 answers · asked by queencrashalot 1

common atoms 1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10

Cu & Cr 1s2, 2s2, 2p6, 3s2, 3p6, 4s1, ......

2007-07-04 04:54:44 · 3 answers · asked by high-lighter 3

2007-07-04 04:49:50 · 3 answers · asked by Niczon 1

2007-07-04 04:49:22 · 2 answers · asked by Anonymous

2007-07-04 04:46:08 · 5 answers · asked by usman a 1

Keratin is a type of insoluble protein found in nature. Is there any artificial way to dissolve it?

2007-07-04 04:22:22 · 2 answers · asked by Olivia 1

Keratin is a type of insoluble protein found in nature. Is there any artificial way to dissolve it?

2007-07-04 04:21:33 · 6 answers · asked by Olivia 1

2007-07-04 04:19:17 · 6 answers · asked by suhail s 1

Help! gurus of chemistry.. question: A 64.213g sample of an unknown compound contained the elements carbon, hydrogen and nitrogen in unknown ratios. It was determined that the combustion of this compound provided 128.2319g of CO2 and 78.73713g H2O. A separate mass spectrometry experiment confirmed the molecular weight of this compound was 88.1528 amu. Use this infomation to determine the molecular formula of this compound.

I would like to know how to do it!

2007-07-04 03:42:36 · 5 answers · asked by Vpow 1

2007-07-04 03:34:57 · 6 answers · asked by Anonymous

2007-07-04 03:33:19 · 1 answers · asked by Anonymous

I tried to dissolve Sodium Alginate (SA) with Trisodium Phosphate (TSP). At first, it was successfully dissolved resulting clear, bright pink, thick liquid gel. Then I tried another experiment with TSP & SA from different source. They are more coarse & grainy than the first one. They results yellowish & unclear color. I don't know what caused this. Is it the TSP or SA? I also don't know whether they have same quality with the first ones. I suspected the purity level of both substances. Is there any methods to determine the purity? and the method to purify them?

2007-07-04 03:30:37 · 1 answers · asked by ? 2

Why is it not possible for crystalization to give 100% yield?

2007-07-04 02:58:32 · 4 answers · asked by Rhea 1

I am in my last year of graduation in chemistry and I want to know a book that can help me in preparing for IIT JAM entrance. Please help...

2007-07-04 02:22:17 · 1 answers · asked by prasad s 1

2007-07-04 01:45:05 · 7 answers · asked by mallikarjuna D 1

Do the Na^+, K^+ and NH4^+ share a particular property that makes their salts soluble?

2007-07-04 01:27:11 · 3 answers · asked by Anonymous

Is the war the only reason? If so, why can't we get it somewhere else?

2007-07-04 01:26:51 · 9 answers · asked by happydema 2

Best if there are references to back it up. Thanks a lot. Need it by tonight! :(

2007-07-04 01:08:46 · 2 answers · asked by rc 2

Hi,

What are the methods in removing the chlorine residual in water? Issit activated carbon and heating? Or there are other method(s) in removing the chlorine content in water?

Is there any relevant website which is about the removal of chlorine in water?

Thanks.

2007-07-04 00:18:08 · 5 answers · asked by superstar_diva89 1

2007-07-03 23:32:21 · 2 answers · asked by bhanu 1

Something like beneficiation Process for Bentonite

2007-07-03 22:00:57 · 2 answers · asked by mopa 1

We are trying to purify BaSO4 by dissolving it in an Na5DTPA solution and then re-precipitating it out, but we can't seem to get past the first step of dissolving the BaSO4! We are using a 0.05M DTPA solution made up with 1M NaOH which we got from a journal article. We've tried grounding the BaSO4 into fine powder, heating, ultrasonicating but nothing works. Any ideas?

2007-07-03 19:58:02 · 3 answers · asked by carlaeh 1

I had an organic chem test today and here is one of the questions a few of us struggled with.... "Draw the conjugate acid of propanol." Hoping someone can help me even though I know we cannot draw figures on this site!!!

2007-07-03 19:31:41 · 6 answers · asked by S7L7S7 1

Zn(s) / ZnCl2(aq) // Cl-(aq)/ Cl2(g)/ C(s)

In the electrochemical cell described by the cell diagram above, what reaction occurs at the anode?
a) Zn-> Zn2+ +2e-
b) Zn2+ + 2e- --> Zn
c) Cl2 + 2e -> 2Cl-
d) 2Cl- --> Cl2+ 2e
e) Zn+ Cl2 --> ZnCl2

answer is A but i dont get it
i dont get what the "diagram" is trying to tell me either

by the way, the "/" slanted lines in the diagram are supposed to be straight lines but i made them slanted to make it look less confusing

2007-07-03 19:01:33 · 4 answers · asked by Anonymous

2007-07-03 16:09:40 · 4 answers · asked by Anonymous

what's the difference between them?

2007-07-03 16:04:21 · 3 answers · asked by little_fella 2