Chemistry - June 2007

Cu(NO3)2 + NH3 -->
Zn(NO3)2 + NH3 -->
Zn(SO4) + NH3 -->

2007-06-30 03:48:26 · 1 answers · asked by mozzarella_24 2

I am chemical eng. and I am going to reseach in the ibomea carnea about drugs which contained in its leaves , my reseach will also show the value of drugs in medicine and an apprpriate method of extracting

2007-06-30 03:39:13 · 1 answers · asked by muain 1

what is the definition of atom? maybe we can create it by control the number of subatomic.

2007-06-30 03:06:00 · 6 answers · asked by ZyamsouI 3

2007-06-30 02:59:29 · 3 answers · asked by bihariraja 3

pls...send as much as possible step by step,complete and clear

2007-06-30 01:09:06 · 2 answers · asked by marco e 1

I am camping near the river forest. It very sandy,wet and worm. Its ideal place for mosqitos. We (my friends and I) tried for years to solve that problem with all kind of insecticides that we could buy in regulary stores, some kind of smoke insecticides and spreys, and fire smoke of course..The nature is beautiful there and we are fighting with them for two years, but, with this global worming its getting harder... Anybody knows what kind of insecticide is the most effective?

2007-06-30 01:05:43 · 5 answers · asked by johnny 1

plz write its observation toooooo

2007-06-30 00:22:33 · 6 answers · asked by vishal p 1

could 1N acetic acid be used to titrate the sodium bicarbonate in place of sulfuric acid?

if you have an answer to this question, please kindly write the source(website) for me to be able to see the source. thanks.

2007-06-29 23:25:59 · 1 answers · asked by Anonymous

explain these observations.

2007-06-29 23:06:23 · 4 answers · asked by homework! 1

2007-06-29 22:07:29 · 2 answers · asked by Anonymous

banana peelings can be used for charcoal, so what's the reaction between the two?

2007-06-29 21:16:12 · 2 answers · asked by Anonymous

please..i really need help...thanks!

2007-06-29 18:51:51 · 3 answers · asked by Sofia 1

my investigatory project is " using charcoal as ballpen ink" that was my investigatory project so can you help me the steps in making that kind of project..

2007-06-29 16:33:49 · 1 answers · asked by <<NiKkO>> 1

I need directions on how to make a hydrolysis device which (if you don't know) separates the oxygen and hydrogen from water using electricity. I know the science behind it, i just don't remember how to put the device together. It involves a big battery and wires and two electrodes.

2007-06-29 14:29:09 · 4 answers · asked by Erik C 2

1. in using separatory funnel, why is it not correct to allow both the upper and lower layers to pass through the stem of the funnel?

2. upon what law or principle is extraction based?



please answer in details and if you can give me your sources, please do.
:-) thanks...

and reply as soon as possible.

2007-06-29 13:36:53 · 5 answers · asked by simply 3

I'm doing an electrolysis experiment and require equipment to make up for the beaker and test tubes and something to hold the test tubes. What could I use in the home if don't have this equipment

2007-06-29 12:28:27 · 2 answers · asked by Anthony 4

2007-06-29 12:10:32 · 5 answers · asked by PAUL R 1

2007-06-29 10:31:13 · 4 answers · asked by Anonymous

What would happen if you put Francium in water?
Would it explode? The Cs reaction is pretty violent.

2Fr + 2H2O >>>>>2Fr OH + H2 ????????

2007-06-29 10:25:25 · 5 answers · asked by Anonymous

Cornstarch
White chalk
plaster of paris
Washing soda
epsom salt
baking soda
boric acid
table sugar
table salt.

If I tested the insolubles in iodine which ones would test positive and which ones would test negative?
baking soda?

If the solubles were tested using litmus paper which ones would change to dark blue, light blue, pink or no change?

2007-06-29 07:17:56 · 3 answers · asked by Kerri L B 1

chemtrails

2007-06-29 06:44:11 · 7 answers · asked by lucifer a 2

options are:
a-0.5 mole of N2
b-0.5 mole of N2O
c-1 mole of NO2
d-1mole of NH3

2007-06-29 06:38:19 · 5 answers · asked by shruti d 1

The initial solution in a titration is 20ml of 0.2M HNO3. The nitric acid is titrated with 0.15M KOH in 5.0ml volumes.

1) What is the initial pH of the nitric acid?
2) What is the pH after the addition of 10.0ml KOH
3) How many times of titration are required to reach equivalence point

2007-06-29 06:34:46 · 2 answers · asked by jericholic85 2

Two questions really, but related.

Why doesn't anyone mention the fact that CO2 contains twice as much oxygen as it does carbon? Is it just that they don't understand chemical symbols or because there is no "fear" content in oxygen?

Those who managed that one please explain how you calculate the carbon emissions of, for example an engine. My physics master told me that you can't get out more than you put in, so how does a gallon of petrol, weighing ten pounds produce more than ten pounds of carbon when burned (and please explain how much oxygen it produces).

2007-06-29 05:59:42 · 9 answers · asked by Do not trust low score answerers 7

2007-06-28 19:26:03 · 7 answers · asked by wonderwoman 1

2007-06-28 18:16:24 · 3 answers · asked by Keith L 1

We had to look through a thin two inch by two inch "cobalt blue glass" to see the color of the element flame. But, I don't know what the piece of "glass" is supposed to do. I think it has something to do with wave frequency and length?

2007-06-28 16:46:25 · 3 answers · asked by bananaxsm00thie 2

2007-06-28 16:19:23 · 2 answers · asked by Anonymous

2007-06-28 16:09:30 · 11 answers · asked by Anonymous

2007-06-28 16:00:46 · 8 answers · asked by Anonymous