Chemistry - March 2007

Each element has a different set of energy levels. Use this fact to explain why the colour of the light emitted by an element in the gaseous state is characteristic of the element. (Three or four sentences)

2007-03-09 08:38:22 · 7 answers · asked by Anonymous

I am doing a chemistry project in which I am testing the rate of oxidation of iron by submerging iron nails into a salt and water solution. I want to test different types of salts but I'm not sure what to use besides table salt.

2007-03-09 08:35:24 · 2 answers · asked by Anonymous

so lets say you are given a concentration of hcl = x ; and a concentraction of hc2h3o2 = y
how would you find the the percent ionization and pH of of the acetic acid?

2007-03-09 08:29:15 · 3 answers · asked by sapient45 2

sulfur, S8


methane, Ch4


carbon monoxide,CO


cobalt, CO

2007-03-09 08:22:59 · 11 answers · asked by Anonymous

A heterogenous mixture is to a homogenous mixture as immiscible liquids are to ________!

2007-03-09 08:20:33 · 6 answers · asked by Anonymous

2007-03-09 08:16:11 · 3 answers · asked by Jennifer B 3

Please write rhe answers in cal/g, joules/g and Kj/g

2007-03-09 08:15:43 · 1 answers · asked by Anonymous

What volumes of 0.58 M HNO2 and 0.59 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.46?
HNO2

2007-03-09 08:07:54 · 5 answers · asked by smile 1

I don't get it cas if water was there before language than why did it have to be known as wet???

2007-03-09 08:07:37 · 3 answers · asked by X.x 5

It's the highest grade you can buy (HPLC grade.)
The bottle says "Avoid Contact with Skin and Eyes."
I didn't know water was so dangerous!!!
I am not going to go out in the rain or take a shower anymore then. Hello stinky pits!!!

2007-03-09 08:01:49 · 4 answers · asked by ♪ ♫ ☮ NYbron ☮ ♪ ♫ 6

I was recently watching the movie Gandhi, and they went to a salt works and protested. I was curious to what a 'salt works' does. I'm assuming it takes the salt out of salt water from the sea. Any answers?

2007-03-09 07:55:38 · 4 answers · asked by Anonymous

2007-03-09 07:55:23 · 4 answers · asked by a_idahor 2

2007-03-09 07:29:19 · 2 answers · asked by rd4yp 2

2007-03-09 06:34:47 · 7 answers · asked by shoptyd_2000 1

a) CO2 : nonpolar

b) PCl3 : nonpolar

c) CH3CH2OH : polar

d) PCl5 : nonpolar

2007-03-09 06:28:37 · 7 answers · asked by mimi 1

A: Na + O(2) NA(2)O
B: 2Na(2) + O(2) 2Na(2)O
C 2Na + 2O(2) 2NA(2)O
D 4Na +O(2) 2Na(2)O

2007-03-09 06:14:06 · 6 answers · asked by d d7325 2

CuCo3(s)+HCl(aq) ,
Cuo(s)+HCl(aq),

AgNO3(aq)+HCl(aq),
Pb(NO3)2(aq)+HCl(aq),
Cu(NO3)2(aq)+HCl(aq),
F(eNO3)2(aq)+HCl(aq),
Ba(NO3)2(aq)+HCl(aq),
KNO3(aq)+HCl(aq),

AgNO3(aq)+NaOH(aq),
Pb(NO3)(aq)+NaOH(aq),
Cu(NO3)2(aq)+NaOH(aq),
Fe(NO3)3(aq)+NaOH(aq),
Ba(NO3)(aq)+NaOH(aq),
KNO3(aq)+NaOH(aq),

AgNO3(aq)+H2SO4(aq),
Pb(NO3)2(aq)+H2SO4(aq),
Cu(NO3)2(aq)+H2SO4(aq),
Fe(NO3)3(aq)+H2SO4(aq),
Ba(NO3)2(aq)+H2SO4(aq),
KNO3(aq)+H2SO4(aq),

2007-03-09 06:05:03 · 3 answers · asked by knightangel83 1

a. 2qt
b. 3qt
c. 6qt
d. 9qt

2007-03-09 06:01:03 · 1 answers · asked by Anonymous

What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 23.0 L of water to produce an antifreeze solution with a freezing point of -29.0 degrees C? (The density of ethylene glycol is 1.11g/cm^3, and the density of water is 1.00 g/cm^3.)
What is the boilong point of this solution?

2007-03-09 05:49:55 · 1 answers · asked by westafrica88 1

2007-03-09 05:47:17 · 2 answers · asked by simonkf2002 1

2007-03-09 04:57:17 · 9 answers · asked by Anonymous

2007-03-09 04:53:41 · 15 answers · asked by Anonymous

how to make potassium nitrate with safety precaution?

2007-03-09 04:25:42 · 3 answers · asked by Apple 1

this is science question

2007-03-09 04:21:51 · 6 answers · asked by *Brittiny&Chad* 1

2007-03-09 04:04:19 · 2 answers · asked by Anonymous

PLEASE HELP!!!

2007-03-09 04:03:01 · 2 answers · asked by Anonymous

2007-03-09 03:58:26 · 1 answers · asked by chejay22 1

Also can someone desribe their chemical function as an enzyme or give me a link to info about that and also the toxin in general......

2007-03-09 03:48:20 · 1 answers · asked by Koko Butta Kream 4

2007-03-09 03:46:41 · 10 answers · asked by ravichandran n 1

2007-03-09 03:44:04 · 2 answers · asked by Renegade Of This Time and Age! 2