Chemistry - March 2007

I need this for my assignment i'm in yr 11, please help! i don't really understand.

2007-03-09 12:36:59 · 7 answers · asked by ash c 1

NH4HS(s)  NH3(g) + H2S(g) Hº = +93 kilojoules
The equilibrium above is established by placing solid NH4HS in an evacuated container at 25ºC. At equilibrium, some solid NH4HS remains in the container. Predict and explain each of the following.
(a) The effect on the equilibrium partial pressure of NH3 gas when additional solid NH4HS is introduced into the container
(b) The effect on the equilibrium partial pressure of NH3 gas when additional solid H2S is introduced into the container
(c) The effect on the mass of solid NH4HS present when the volume of the container is decreased
(d) The effect on the mass of solid NH4HS present when the temperature is increased.


Thank you!

2007-03-09 12:26:46 · 3 answers · asked by Anonymous

2007-03-09 12:25:19 · 5 answers · asked by gabriel g 1

2007-03-09 12:01:25 · 2 answers · asked by libraseptemberjackson 1

2007-03-09 11:54:35 · 1 answers · asked by libraseptemberjackson 1

2007-03-09 11:44:56 · 4 answers · asked by libraseptemberjackson 1

2007-03-09 11:42:03 · 3 answers · asked by libraseptemberjackson 1

If sodium-24 has a half-life of 15 hr, what is the activity of the sodium after 2 1/2 days? i dont understand half lifes or how to solve them...

2007-03-09 11:26:42 · 2 answers · asked by orange_crush_05 6

i would realyy apreciate it, if you help me, thanks

2007-03-09 11:11:30 · 0 answers · asked by Anonymous

what can you use it for??

2007-03-09 11:05:06 · 3 answers · asked by boogells 1

2007-03-09 11:05:00 · 1 answers · asked by goddesssempai 1

-the principle behind all hydraulic devices is that the -------- is magnified but the ---------stays the same.
-According to archimedes principle an object will FLOAT when the weight of the displaced liquid is
-------- or ---------- than the weight of the object.

2007-03-09 10:44:38 · 3 answers · asked by Anonymous

2007-03-09 10:41:04 · 7 answers · asked by Anonymous

2007-03-09 10:31:46 · 2 answers · asked by Anonymous

Which of the following are conjugate acid-base pairs ?



a) H3O+ and OH -
b) HClO and HCl
c) HClO4 and ClO4-
d) HF and F -
e) H2O and OH -

2007-03-09 10:31:24 · 2 answers · asked by Anonymous

2007-03-09 10:26:21 · 3 answers · asked by Heavy Metal 3

2007-03-09 10:23:48 · 7 answers · asked by Meixian H 2

What is the value of K if the following concentrations are found at equilibrium? [O2] = 0.200 mol / L, [F2] = 0.0100 mol / L, OF2] = 0.0633 mol / L

I need help, I am just lost on this one.

2007-03-09 10:21:15 · 2 answers · asked by Heavy Metal 3

2007-03-09 09:42:39 · 2 answers · asked by Meixian H 2

2007-03-09 09:38:22 · 3 answers · asked by Debra B 1

How would I calculate the pH of a 0.20M KNO2 sol*n? Same for a 0.37M NH4ClO4 sol*n? Any help is appreciated!

2007-03-09 09:32:15 · 3 answers · asked by boardndave 1

2007-03-09 09:19:37 · 2 answers · asked by Tim 1

Can 2 atoms of the same element ever have different atomic numbers? Why or why not?

2007-03-09 09:17:45 · 3 answers · asked by topaz898 1

Maybe it is beta, gamma, alpha, or something else; I'm not sure, one of the answer is 'no correct answer'--maybe it is that. Thanks.

2007-03-09 09:11:59 · 7 answers · asked by Anonymous

I WILL VOTE FOR YOU IF YOU ANSWER! THANKS TO ALL!!!!

2007-03-09 09:11:16 · 5 answers · asked by cooldude123 2

"mathematicly"

2007-03-09 09:01:39 · 3 answers · asked by fa d 1

that corrects the gay gene in peoples bodies to become "normal"??

is that a rumour...or a joke even???

2007-03-09 08:55:27 · 2 answers · asked by dodge 1

When measuring pH the voltage (mV) gets more positive as {H+} increases. Do the voltage always get more positive as { } increased for ammonia and nitrate ISEs? If not, please, explain why.

2007-03-09 08:48:58 · 1 answers · asked by chang 1

2007-03-09 08:43:03 · 9 answers · asked by tar.elendil 1

2007-03-09 08:38:53 · 17 answers · asked by amateurgrower 3