Chemistry - May 2007

Hello, everyone. I am doing a worksheet about chemistry. Can anyone help me to answer these questions?
1. Reaction with hydrochloric acid of Silver, aluminium, copper.
2. Chemical component of the ore of Silver, aluminium,copper.
3. Method of extraction of copper.
4. Reaction with oxygen of iron and copper.

2007-05-23 05:07:42 · 4 answers · asked by Anonymous

2007-05-23 04:48:58 · 4 answers · asked by Anonymous

Na+ + OH- ----->NaOH

does the above reaction occur?

2007-05-23 04:47:40 · 3 answers · asked by meg 1

if you could attach the equation used to solve this, i would appreciate it.

2007-05-23 04:44:58 · 10 answers · asked by ngathile 2

2007-05-23 04:35:52 · 6 answers · asked by ngathile 2

2007-05-23 03:29:41 · 2 answers · asked by sudeepan 1

2007-05-23 03:23:19 · 6 answers · asked by embem171 4

What is the mass( in grams) of iron that contain the same number of atoms as 780g of potassium.

2007-05-23 03:22:34 · 5 answers · asked by Raphael A 3

2007-05-23 03:19:20 · 3 answers · asked by turnerlorenzo 1

Does anyone know that how can i download the book call : Bio based Polymers And Composites . by Elsevier Publication 2005 ? or does any one have this book!!

2007-05-23 03:01:30 · 1 answers · asked by tasooji 2

I did an experiment recently that invloved evaporating water from 55 ml of Copper Sulfate Solution so that solid copper sulfate remained. When all the water has been evaporated, blue copper sulfate crystals remained. However, the copper sulfate crystals were heated a little too long, and they turned white. Why do copper sulfate crystals turn white when they loses waters? Why do they turn blue when hydrated? If you could provide any other information or website links regarding this topic, feel free! Thank you!

2007-05-23 02:52:37 · 6 answers · asked by Anonymous

In chemistry, is it possible to have a mixture of compounds?

If so, please give an example.

2007-05-23 01:52:11 · 7 answers · asked by duck_michelle 3

We must use the ion electron method balancing by inspection will not be accepted thank you and i would be grateful if someone could walk me through the steps

2007-05-23 01:41:27 · 3 answers · asked by Anonymous

In case of polmers it happened that there is another temperature than its melting point which play an important role . So I want to know it

2007-05-23 01:26:42 · 6 answers · asked by jai 1

2007-05-23 01:11:52 · 1 answers · asked by KANAN W 1

2007-05-22 23:30:55 · 4 answers · asked by S G 1

2007-05-22 23:13:07 · 6 answers · asked by some1 strnage 1

pls also give some sites regarding information about chemistry Pls helllppp meeee

2007-05-22 22:50:54 · 3 answers · asked by sks 1

i like to take guidance from the person whois doing research on gold,silver and their oxides
Is there anybody around ahmedabad gujarat?
plz contact to me
thanks

2007-05-22 22:49:40 · 1 answers · asked by amit9363 1

i like to take guidance from the person whois doing research on gold,silver and their oxides
Is there anybody around ahmedabad gujarat?
plz contact to me
thanks

2007-05-22 22:48:51 · 2 answers · asked by amit9363 1

Dear sir
someone plz help me to make silveroxide(Ag2O) powder in the lab.And where are the major application of Silveroxide in the industries?
thanks

2007-05-22 22:33:51 · 1 answers · asked by amit9363 1

Dear sir
someone plz help me to make silveroxide(Ag2O) powder in the lab.And where rare the major application of Silveroxide in the industries?
thanks

2007-05-22 22:31:02 · 1 answers · asked by amit9363 1

Calculate the solubility of Ca(OH)2 in a 0.700M NaOH solution at 43°C, given that the Ksp of Ca(OH)2 is 7.50 x 10-6 at that temperature

answer in micro Molar units.

thx heaps

2007-05-22 22:29:24 · 2 answers · asked by Anonymous

Fe3+(aq) + 3OH-(aq) <==> Fe(OH)3(s)

thz

2007-05-22 22:21:00 · 4 answers · asked by Anonymous

Starters in chemistry or in biotechnologies

2007-05-22 22:03:58 · 1 answers · asked by rajesh v 1

The reaction:
2 NO2(g) « N2O4(g)

has an equilibrium constant, Kc, of 170 at 298K. Analysis of this system at 298K reveals that 4.90E-1 mol of NO2 and 4.02E-1 mol of N2O4 are present in a 41.0-L flask. Determine the reaction quotient, Q, for this mixture. Enter your answer in scientific notation. Tell me how to do it also.

2007-05-22 21:25:53 · 2 answers · asked by Bruce 1

A voltaic cell is constructed with one electrode compartment consists of a silver strip placed in a solution of AgNO3, and the other has a nickel strip placed in a solution of NiCl2. The overall cell reaction is given below.
2 Ag+(aq) + Ni(s) => 2 Ag(s) + Ni2+(aq)

(a) Select the correct half-reactions that occur in the two electrode compartments.
2 Ag+(aq) + e- => 2 Ag(s)
2 Ag(s) => 2 Ag+(aq) + 2 e-
Ni(s) + 2 e- => 2 Ni(aq)
Ag+(aq) + e- => Ag(s)
Ag(s) => Ag+(aq) + e-
2 Ni(s) => Ni2+(aq) + 2 e-
Ni(s) => Ni2+(aq) + 2 e-
Ni2+(aq) => Ni(s) + 2 e-

(b) Which electrode is the anode, and which is the cathode in the following equation? (Type your answer using the format C for carbon.)
2 Ag+(aq) + Ni(s) => 2 Ag(s) + Ni2+(aq)

anode ____________

cathode ____________

2007-05-22 20:19:40 · 3 answers · asked by sydney 1

I am looking for the differenty types of derivatives of ketones an alcohols and the names, m.p., b.p., etc of and which compund they are derived from. Tables like this exist, I have a few in my books, but I need some additional ones from online. They consist of the name of a compound, its b.p. or m.p., and the different types of derivatives for that compund as well as its derivative's m.p. I mainly need it for ketones and alcohols.

2007-05-22 19:31:49 · 2 answers · asked by Anonymous

Hi there. Usually performance of correction tape is related to the factor of temperature and relative humidity. Higher temperature environment can promote migration of adhesive to the back of foundation tape can causing blocking defect. How about relative humidity can affect the performance? Thanks.

2007-05-22 19:25:37 · 2 answers · asked by stevenfoong 1

the ions in the compound formed from Z=21 and Z=16? please explain

2007-05-22 18:40:26 · 1 answers · asked by Anonymous