Chemistry - March 2007

2007-03-29 05:58:37 · 2 answers · asked by Anonymous

I want to do a lab practice for showing the Tyndall effect, but I don't have sodium thiosulfate, so what can I use? Does it work with ferric chloride?

2007-03-29 05:57:09 · 2 answers · asked by Quake 2

This was an exam question. Can u please write detailed and scientific reasons for this answers.

2007-03-29 05:14:50 · 8 answers · asked by Anonymous

2007-03-29 04:15:07 · 11 answers · asked by Anonymous

Why are some substances more soluble than others?

2007-03-29 03:51:20 · 5 answers · asked by Anonymous

1.) an electron arrangement where the outermost shell contains 2 or 8 electrons ( 6 letters)
2.) areas within cloud where electrons are found (6 letters)
3.) elements with outer shell containing 1 more electron than a stable number ( 2 words and 13 letters)
4.) number of electrons gained, shared or lost when atom combines (7 letters)
5.) force joining atoms together ( 2 words and 13 letters)

2007-03-29 03:39:43 · 1 answers · asked by TheGreatest 3

a) dissolution of aluminium in KOH (aq). It is easier to work this out by assuming that the Al dissolves in water to give Al(OH)3, followed by reaction of this trihydroxide with KOH to give KAl(OH)4.

b) formation of the trioxalate complex, i.e. reaction of KAl(OH)4 with oxalic acid in the presence of excess KOH to give K3Al(C2O4)3.H2O

2007-03-29 03:27:24 · 1 answers · asked by Anonymous

pH of a 0.10 M HCN solution with pH=5.2

to find [H+] i'm supposed to do 10^5.2?

how could i find [CN] and [HCN]?

2007-03-29 01:26:16 · 3 answers · asked by sky l 1

2007-03-28 23:41:21 · 7 answers · asked by Anonymous

1. Which of the following pairs of atoms are most likely to form covalent bond?
A. oxygen (O) and nitrogen (N)
B. oxygen (O) and magnesium (Mg)
C. oxygen (O) and krypton (Kr)

2. Which of the following pairs of atoms are most likely to form ionic bonds?
A. oxygen (O) and nitrogen (N)
B. oxygen (O) and magnesium (Mg)
C. oxygen (O) and krypton (Kr)

3. does (O2) have a nonpolar bond?

2007-03-28 21:27:30 · 5 answers · asked by cult_king_666 1

water ionization constant depends on temperature and is there significant difference of the value at 25 C(which normally takes as pKw = 14) and 37 C.
The ionic strength may effect on this value as well

2007-03-28 21:20:33 · 1 answers · asked by copper 1

Water production being the life resource it is, should be, attended to by being created from the atoms in the air.
Research in this area , may result in projects similar to nuclear reactors for energy production.
If so, then has the time arrived for that to be looked into?

2007-03-28 20:49:26 · 10 answers · asked by jsghatahora 2

1) When two atoms come in contact, both of which tend to gain electrons, what type of bond is formed?

Would it be a covalent bond?


2) When the atoms in a molecule share two electrons, these electrons are called what?


3) How many covalent bonds is it possible for any atom to form?

2007-03-28 20:06:40 · 3 answers · asked by dex4774 1

I want a list of NABL approved labs in India which are approved to test Chemical and Microbiological parameters for animal feeds, Minerals and water.

2007-03-28 20:02:47 · 1 answers · asked by Anonymous

2007-03-28 19:13:28 · 2 answers · asked by jamin7_cda 1

These are absolutely driving me crazy. You don't have to give me the actual answer if you don't want to, a simple explanation of how to find it would do, too. But I won't say no to the actual name. I'm just trying to find the structural formulas for the following compounds, and I'm not the best at this.

1. tetraamminenickel(II) perchlorate
2. tetraammineplatinum(II) tetrachlorocuprate(II)

Thanks in advance!

2007-03-28 18:59:31 · 4 answers · asked by soulintent 2

2007-03-28 17:51:30 · 3 answers · asked by Anonymous

2007-03-28 17:40:34 · 1 answers · asked by John B 1

Consider the following equilibrium at a certain temperature: A(g) yields 2B(g), K=0.280. If initially a flasks contained equal concentrations of A (g) and B (g), 0.200 M each, what will their concentrations be when equilibrium is established?

2007-03-28 17:38:00 · 1 answers · asked by MARSHAL 2

2Fe + 3S = 2Fe2S3

4P4 + 1H2= PH3

2NO+ Cl2 = NOCl

Can someone please correct me and tell me what im doing wrong and how i can fix it for tommorows test thank you

2007-03-28 17:37:01 · 3 answers · asked by Bayslappers 1

2007-03-28 17:15:45 · 6 answers · asked by Eric B 1

i need to know about price about price of radium.

2007-03-28 17:09:25 · 2 answers · asked by sam 007 2

I am trying to figure out how to draw Lewis structures of compounds with metals. For example, Cr2O3. But I cannot figure out how to determine bond order, or number of electron pairs on each atom.

2007-03-28 17:09:01 · 1 answers · asked by John B 1

Gas Particles travel at speeds of up to 500 meters per second. Why, then does it take so long for gas molecules to travel the legnth of the room

2007-03-28 17:04:00 · 2 answers · asked by Anonymous

2007-03-28 16:29:25 · 12 answers · asked by Angela W 1

2007-03-28 16:28:42 · 3 answers · asked by Angela W 1

2007-03-28 16:21:50 · 9 answers · asked by jamin7_cda 1

2Ag+ + Cd = 2Ag + Cd2+





Enter a numeric answer only

2007-03-28 16:19:11 · 1 answers · asked by Anonymous

If light were passed through a round hole instead of a thin slit in a spectroscope, how would the spectral "lines" appear? What is the drawback of a hole relative to a thin slit?

2007-03-28 16:11:27 · 1 answers · asked by NoMoreBabydoll 3

Platinum has a face-centered cubic unit cell. An early calculation of the diameter of platinum was 2.75 angstroms. Based on this what would be the density of platinum? (grams per centimeter cubed)

Atomic weight of Platinum = 195.09 g/mol

2007-03-28 15:57:55 · 2 answers · asked by Anonymous