Chemistry - September 2006

2006-09-27 00:12:47 · 7 answers · asked by scott.radley 4

2006-09-26 23:45:45 · 2 answers · asked by heyyyleni 2

2006-09-26 21:39:48 · 6 answers · asked by kristine lovele n 1

2006-09-26 21:30:29 · 3 answers · asked by Lai Yu Zeng 4

hi ,
it is known that thin layer chromatography is not suitable for quantitative analysis of components in an unknown compound but does anyone knows the exact explanation for it??

2006-09-26 21:00:19 · 6 answers · asked by Anonymous

2006-09-26 19:35:21 · 6 answers · asked by nicole 1

in an atom, how is the electron, neutron, and proton amount determined?

and what does it mean when you have something like

Mg 2+ does that mean it has 2 extra protons? But if the # of protons equals the atomic number (12), then why does it have 12 protons, 10 electrons, and 12 neutrons? why did the protons stay the same but the electrons decreased? or am i doing this wrong?

2006-09-26 19:15:42 · 6 answers · asked by Sminty 2

N2, O2, H2O, etc., versus U235? Everything is radioactive to some degree, right?

2006-09-26 18:01:54 · 2 answers · asked by presidentrichardnixon 3

as many website as you can

2006-09-26 17:45:17 · 2 answers · asked by Anonymous

if i already have buffers prepared by using Na acetate and acetic acid, how would i adjust their pH up? down? without altering the molarity?
why?

2006-09-26 17:19:35 · 4 answers · asked by Anonymous

gluten and casein are proteins found in wheat and cows milk respectively.

2006-09-26 16:41:34 · 3 answers · asked by memac63 2

2006-09-26 16:30:42 · 7 answers · asked by elven_archer24 1

2006-09-26 16:21:52 · 2 answers · asked by farmoder 1

2006-09-26 16:20:29 · 6 answers · asked by coolnad17 1

2006-09-26 16:02:40 · 4 answers · asked by Huda H 2

2006-09-26 15:50:41 · 8 answers · asked by Huda H 2

2006-09-26 15:30:43 · 5 answers · asked by james matthew a 1

2006-09-26 15:15:28 · 16 answers · asked by Magdalena 2

What is the minium kelvin temperature the system must be heated to to make the below reaction product favored ?
Zn (s) + Al2O3 (s) → ZnO (s) + Al (s)
I balanced it out to be :
3Zn(s) + Al2O3 (s) > 3ZnO(s) + 2Al(s)
I tried this problem like 5 times but dont get the right temp...

2006-09-26 15:15:22 · 3 answers · asked by crazycuty4eva 1

2006-09-26 15:12:42 · 10 answers · asked by Steven I 1

how would a reaction be effected if a student was past the endpoint of a titration when he took the final buret reading

2006-09-26 15:12:36 · 2 answers · asked by Christie 3

Silicon has 3 common isotopes 28 Si, 29 Si and 30 Si. the number is the atomic mass. the average atomic mass of Si is 28.0855. determine the percent abundance for each isotope w/o looking it up.

i dont need the answer, just the method of determining it
i was planning on a system, w/ the equations being:
28x+29y+30z=28.085
x+y+z=1 The variables are percent abundance

However, i dont think this will work b/c i need a third equation.
if anyone knows how to do this, please answer with how and i will greatly appreciate it.

2006-09-26 15:11:03 · 2 answers · asked by George S 4

Methane CH4, Aluminum Chloride AlCl3, Ethanol C2H5OH, Benzene C6H6, Copper Cu

2006-09-26 15:04:42 · 8 answers · asked by SICK MY DUCK! 1

2006-09-26 14:59:16 · 6 answers · asked by SICK MY DUCK! 1

2006-09-26 14:49:13 · 4 answers · asked by Baralia 1

2006-09-26 14:48:52 · 3 answers · asked by Anonymous

2006-09-26 14:39:30 · 3 answers · asked by Anonymous

2006-09-26 14:23:46 · 3 answers · asked by SCIENCE MAN 1

2006-09-26 13:46:19 · 6 answers · asked by Snickers 3

a) 0.0200 mole AL and 0.0600 mole Cl

b) 0.0800 mole Ba, 0.0800 mole S, and 0.320 mole O

It would be nice if tell me some tips to write this kind formula.

2006-09-26 13:29:42 · 3 answers · asked by hetrp 1