Chemistry - April 2007

2007-04-03 11:35:27 · 2 answers · asked by Anonymous

use grams of...:
1.0gAu X 1 mol / 197Au X 3mol O2 / 4 mol Au X 32g O2 / 1 mol O2

...to check

FYI
X= multiply

2007-04-03 11:19:32 · 1 answers · asked by Anonymous

2007-04-03 11:07:38 · 21 answers · asked by pam r 1

spice cigarrettes

2007-04-03 10:11:32 · 6 answers · asked by aparosario 1

This equilibrium problem has been killing me for quite a while. And I only have about an hour or two to figure it out. Any help appreciated greatly! Thanks


A + B <-> 2C

The above reaction has an equilibrium constant Kc = 115 at a certain temperature. In a particular experiment, 3.191 mol A, 3.191 mol B, and 3.191 mol C were added to a 1.500 L flask. Calculate the equilibrium concentrations of all species.

2007-04-03 10:03:22 · 2 answers · asked by AppleCard! 2

2007-04-03 09:53:31 · 2 answers · asked by Heell yeaah! 3

My 6th garde kid that today in science class they were doing an expirment. Well they were using Phenyl Salicylate(Salol) to make crystals. He said they melted the Phenyl Salicylate and then cooled it and it made crystals. Well at the end he ate a little of the crystals. Will the Phenyl Salicylate hurt him?

2007-04-03 09:36:08 · 2 answers · asked by maytag 1

Match each molecule with the hybridization of the carbon atom.
1) C2O42-
2) NCO-
3) CO32-
4) CO2

A. sp3d2
B. sp
C. sp2
D. sp3d
E. sp3

2007-04-03 09:23:59 · 1 answers · asked by socr8711 2

Will more PCl5 form? Will the reverse and forward reaction rates both decrease? Will the reverse reaction be favored? Will more More PCl3, Cl2, and PCl5 form? Or, will the equilibrium just be unaffected?

2007-04-03 09:20:30 · 3 answers · asked by W 1

i know the one of the two means that it is a long chain and one means it is a short chain, or something like that.

for example:

[structure of polymer]x
or
[structure of polymer]n

2007-04-03 09:12:45 · 1 answers · asked by Anonymous

Then, I have to circle two chiral carbons.
I know how 1-chloro-2,3-dimethylpentane
structure looks like but I don't know how to expanded.

2007-04-03 09:07:37 · 2 answers · asked by shortydidi03 2

Consider phenol and methanol. Experimentally, phenol is found to be a stronger acid than methanol. Explain this difference in terms of the structures of the conjugate bases.

2007-04-03 08:50:36 · 2 answers · asked by Roger 1

2007-04-03 08:38:27 · 3 answers · asked by my robot is better than yours 1

The equilibirium constant for the reaction H2(g) + Br2(g) <--------> 2HBr(g) is 2.18 x 10^6 at 730 degrees C. Starting with 3.20 moles of HBr in a 12.0L vessel, cacculate the concentrations of H2, Br2, and HBr at equilibrium.

2007-04-03 08:37:39 · 1 answers · asked by Roger 1

2007-04-03 08:03:01 · 13 answers · asked by nomansland127 1

I can't figure this out, and I think I am just overlooking a fundamental principle. This is the question.

What is the solubility of marble (CaCO3) in normal rain water with a pH of 5.60?

Any help would be greatly appreciated! Thanks!

2007-04-03 07:44:25 · 6 answers · asked by Anonymous

C8H18(l) + O2(g) -> CO2(g) + H2O(g)

2007-04-03 07:04:03 · 4 answers · asked by Anonymous

2007-04-03 07:01:18 · 1 answers · asked by Anonymous

What will be the solubility of bismuth iodide in g/100g water in pure water at 25°C? What will its solubility be in g/100g water in a 6.00x10^-6 M potassium iodide solution? What will its solubility be in g/100g water in a 3.50x10^-5 M bismuth nitrate solution?

I have the answers so I need to see the steps to get there.

2007-04-03 06:56:55 · 2 answers · asked by strawberriitwist 2

What volume in liters provides the following amounts of solute?

a) 0.100 mole of KCL from a 4.0 M KCL solution

b) 5.0 moles of HCL from a 6.0 M HCl solution


Explain in detail please...

2007-04-03 06:43:44 · 2 answers · asked by StarletGirl 1

Also list these in order of increasing acidity please..

H2SO4, HC2H3O2, NH4Cl

2007-04-03 06:41:07 · 2 answers · asked by MD12 2

The reactions are:

PCl3(g) + Cl2(g) ↔ PCl5(g)

CO2(g) + H2(g) ↔ CO(g) + H2O(g)

H2(g) + Br2(g) ↔ 2HBr(g)

2NOCl(g) ↔ 2NO(g)+ Cl2(g)

TlCl3(s) ↔ TlCl(s) + Cl2(g)

2007-04-03 06:31:57 · 1 answers · asked by theweirdguy1 2

So this problem has been boggling my mind for a while. If someone could help me out a little that would be AWESOME. Thanks!


The equilibrium conditions for SO2, O2, and SO 3 are important in sulfuric acid production. When a 0.0219 mol sample of SO3 is introduced into an evacuated 1.65 L vessel at 900K, 0.0135 mol SO3 is found to be present at equilibrium. What is the value of Kp for the dissociation of SO3 at this temperature?

Hint: write a balanced chemical equation for the dissociation of SO 3 first.

2007-04-03 06:25:02 · 1 answers · asked by AppleCard! 2

Ca(ClO3)2 (s) -> CaCl2(s) + O2 (g)

2007-04-03 06:22:30 · 2 answers · asked by downninjette1716 1

CaO (s) + H2O (l) -> Ca(OH)2(aq)

2007-04-03 06:21:10 · 2 answers · asked by downninjette1716 1

2007-04-03 06:13:55 · 1 answers · asked by Buzz 1

does anyone know
1) the equation for this hydrolysis reaction
i have an equation but need conformation
2) what type of reaction this is?
3) Draw out the mechanism for the 2nd order reaction between bromomethane and hydroxide ions.

Thanks for all your help ppl.

2007-04-03 06:04:26 · 3 answers · asked by aka sweety 1

the answer is (c)H3PO3.....all the numbers written are in subscript.
plz give me a proper reason for the answer
I guarantee to select ur answer as the best one if i find it convincing.

2007-04-03 05:51:22 · 2 answers · asked by practico 1

2007-04-03 05:43:45 · 1 answers · asked by Anonymous

An intermediate used in the synthesis of perfumes is valeric acid, also called pentanoic acid. The pKa of pentanoic acid is 4.84 at 25 C. What is the final pH if 8.00 mL of 0.100 M HCL is added to 75.0 mL of the buffered solution?

2007-04-03 05:32:08 · 2 answers · asked by Anonymous