Chemistry - November 2007

2007-11-26 11:12:59 · 10 answers · asked by Anonymous

Do you think it is possible that someone might discover (a) a new element with atomic number 122; (b) a new element that would fit between magnesium and aluminum in the periodic table? Explain.

2007-11-26 10:54:58 · 5 answers · asked by Anonymous

I know that NaCN would react with water to form toxic HCN. But does it react with alcohol?

2007-11-26 10:50:07 · 2 answers · asked by Doodlee 3

PLease Help! Thanks.

a) CO2
b) O2
c) SrO
d) HCOOH
e) P4O6
f) Ba(OH)2

2007-11-26 10:48:26 · 2 answers · asked by Anonymous

2007-11-26 10:46:01 · 2 answers · asked by cherylx08 1

2007-11-26 10:44:55 · 6 answers · asked by Adam 1

if the ionization energy of C(g) is 1086 kJ/mole?

Answer in units of J.

2007-11-26 10:18:44 · 1 answers · asked by Anonymous

2007-11-26 10:12:36 · 3 answers · asked by frumusetza 1

2007-11-26 10:09:07 · 6 answers · asked by nina3vedi@sbcglobal.net 2

1. write a step-by-step process for finding the density of an unknown liquid. list the laboratory equipment needed for each step.

thanks!!

2007-11-26 09:58:51 · 7 answers · asked by WoOoOoOo 4

2007-11-26 09:52:52 · 1 answers · asked by rcg987 1

thanks

2007-11-26 09:51:37 · 1 answers · asked by rcg987 1

What mass of aluminium oxide is produced when 54.0 g of aluminium reacts with excess oxygen?

4Al + 3O(small 2) ---> 2Al(small 2)O(small 3)

And can you please explain how you did it? I'm just trying to remember myself.

2007-11-26 09:50:46 · 2 answers · asked by Anonymous

I am looking to rid a small amount of Lithium from the oil in which it is stored. I know that I require an organic solvent that is not water based, as it will react with the lithium. Any feedback would be great

2007-11-26 09:46:29 · 2 answers · asked by Anonymous

A) C-H
B) Na-I
C) H-F
D) K-F
E) Li-Cl

2007-11-26 09:40:32 · 2 answers · asked by Anonymous

-PH3
-CH4
-H2S
-HF
-NH3

2007-11-26 09:36:26 · 4 answers · asked by Anonymous

2007-11-26 09:23:25 · 2 answers · asked by IDchecker27 2

I was learning these and i went to do them and i forgot could you show like the steps in how you do them?

1.aluminum sulfate +barium chloride --> aluminum chloride + barium sulfate

2.sodium hydrogen carbonate --> sodium carbonate + carbon dioxide +water

2007-11-26 09:19:54 · 4 answers · asked by r 2

as we know, hydrogen is highly flammable diatomic gas, and fire needs oxygen to burn. and we all know water is H2O, 2 hydrogen and 1 oxygen. since water has 2 hydrogen and 1 oxygen. why cant fire burn it?


hmm, i am gonna make the first vehicle that burn water by extracting oxygen from the water and leave the flammable diatomic gas. LOL!

2007-11-26 09:17:39 · 6 answers · asked by Bun 4

Carbon reacts with steam (H2O) under certain conditions to produce hydrogen and carbon monoxide.

a) If 2.4 moles of carbon reacts with 3.10 moles of steam, identify the limiting reactant.

b) How many moles of each product are formed?

c) How many grams of each product are formed?

2007-11-26 09:11:23 · 3 answers · asked by Caramel 2

To be specific I need to find two, but the more the better! Thanks!

2007-11-26 08:56:06 · 2 answers · asked by Jerry 3

Help its for homework!

2007-11-26 08:55:01 · 2 answers · asked by Anonymous

Zinc and sulfur react to form zinc sulfide, according to the reaction: 8Zn + S8 ---->8ZnS

a) If 2.00 moles of Zn are heated with 1.00 moles of S8, identify the limting reactant.

b) How many moles of excess reactant remain?

c) How many moles of product are formed?

2007-11-26 08:48:05 · 5 answers · asked by Caramel 2

i have this stoichiometry question that ive completed but for some reason i dont think that i have the right answer

how many grams of magnesium metal will completely reasct with 50 g of phosporic acid?
Mg+H3PO4
M? 50g
24.31g/mol 98g/mol

n H3PO4= 50g * (1mol/98g) =0.5102mol
n MG= 0.5102mol *(1mol/1mol) = 0.5102mol
M MG= 0.5102 mol *(21.31g/1mol) = 12.43g

also if someone could help me understand molar ratios i would really appriciate it
thanks

2007-11-26 08:16:10 · 1 answers · asked by Anonymous

2007-11-26 08:02:44 · 1 answers · asked by Daniel F 1

Please its urgent my assignments due in wednesday and i have looked everywhere for this conversion and can't find it. I need it to work out the mole.

2007-11-26 07:48:21 · 4 answers · asked by Anonymous

What is the energy (in J/particle) of ultraviolet radiation that has a wavelength of 2.278 x 10 ^-2 micrometers?
The speed of light is 3.00 x 10^8 m/s.

Please show the steps or explain so I will understand how to do this. Thanks

2007-11-26 07:31:46 · 1 answers · asked by Anonymous

2007-11-26 07:17:05 · 1 answers · asked by Gideon 1

2007-11-26 07:13:14 · 5 answers · asked by zb83b 2

What element is this?
I am lack luster.
I am bone idle and lazy.
I am used in arc welding because i wont combine with oxygen and explode.
I am also sometimes found in lightbulbs.

2007-11-26 06:09:44 · 7 answers · asked by Nikki 1