Chemistry - July 2007

Ammonia reacts with acid to form ammonium salt. What volume of 2.00 mol dm^-3 of sulphuric acid will completely react with 240 cm³ of ammonia, measure at r.t.p

Please provide working steps..
Thanks.

2007-07-22 04:29:09 · 3 answers · asked by N.y.Rych 1

how long will it take for th compond to decay to .350g?

2007-07-22 03:55:59 · 1 answers · asked by Anonymous

2007-07-22 03:55:36 · 5 answers · asked by mat4sam 1

2007-07-21 22:37:39 · 3 answers · asked by Petz D 1

2007-07-21 21:24:55 · 3 answers · asked by Anonymous

If anyone know the answer, i'll appreciate it. I think it's got something to do with hydrogen bonding, but then I might be wrong.....

2007-07-21 19:37:20 · 8 answers · asked by Anonymous

This question is from physics .

2007-07-21 17:02:36 · 2 answers · asked by ashok g 1

Please if you answer... break it down so I can come to understand how to find density of a substance. This is NOT (NO LONGER) homework... but it will be covered on an extensive exam.

2007-07-21 14:43:01 · 5 answers · asked by adkins147 1

I'm supposed to balance silver nitrate and potassium phosphate to write the net ionic equation for the precipitation reaction.
So far, I have this :
AgNO3 + K3PO4 -> Ag3PO4 + KNO3
That's not balanced, is it?

2007-07-21 13:04:35 · 2 answers · asked by decaelegant 2

What are the
following for the product?

A. Atomic number B. Mass number C. Name of the product element.

2007-07-21 12:41:06 · 2 answers · asked by louh 1

I cant figure these seven compounds out. can someone do them for me and tell me how you get the answer for some of them

1.CuC2H3o2
2.CaC2o4
3.NaHso4
4.NaHCO3
5.NiBr3
6.Be(NO3)2
7.AuCI3

2007-07-21 11:31:24 · 2 answers · asked by Guy 1

2007-07-21 10:57:01 · 3 answers · asked by Quynh N 2

im looking to buy flash powder. but its near impossible to get.

2007-07-21 10:56:07 · 4 answers · asked by snowsurfer8021 1

did I do these correctly?
Decomposition reactions:
(NH4)2CO3-->CON2H4+2H2O
2KIO3-->3O2+ 2KI
KIO3+ AgNO3--->O2 + AgI ????
KI + AgNO3---> ???
KClO3---> ???

2007-07-21 10:31:45 · 2 answers · asked by pwbapro 1

2007-07-21 10:25:23 · 1 answers · asked by Anonymous

2007-07-21 10:24:15 · 2 answers · asked by Anonymous

I need to balance these equation but cant figure them out

1.CL2+NaBr> NaCL+Br2

2.Hgo+CL2> HgCL+O2

2007-07-21 10:15:29 · 4 answers · asked by Guy 1

What's the amount of pure, 98%, liquid H2SO4 to be used in order to prepare a solution with a concentration of 0.02 N (normality)

2007-07-21 10:08:03 · 1 answers · asked by Jose 1

Liebermann-Burchard test is a confirmatory test for presence of cholesterol which is indicated by a blue-green color. I would like to know how it works and the reactions involved in the test.

2007-07-21 09:36:53 · 3 answers · asked by squidring 1

Add 5ml of 6M HCl to test tubes. Temperature of the test tubes are:
4 degrees C
20 degrees C
50 degrees C
Add zinc ribbon, which is 0.5g. How do you calculate the rate of reaction as moles of Zn per minute? Previous trials revealed these reaction times:
4 degree C test tube @ 920 seconds
20 degree C test tube @ 290 seconds
50 degree C test tube @ 60 seconds

I need 3 calculations, one for each.... Thanks!

2007-07-21 09:23:57 · 2 answers · asked by pwbapro 1

From the following list of chemicals, select 2 combos that would lead to a double replacement reaction (complete balanced equations, too!)
KCl
HNO3
AgNO3
PbCl2
Na2SO4

Any ideas? Thanks

2007-07-21 09:01:25 · 2 answers · asked by pwbapro 1

and also, why is it that when SO3 is added to water the pH decreases?

2007-07-21 08:52:06 · 2 answers · asked by AP 1

2007-07-21 07:21:39 · 22 answers · asked by matt30 2

hint: convert grams of NaOH to moles of NaOH first

2007-07-21 07:13:05 · 3 answers · asked by Holly D 3

as far as I know nutrasweet is used as sweetener by diabetic people.

2007-07-21 05:40:43 · 4 answers · asked by dodong1127 2

The half-reaction occuring at the anode in the balanced reaction shown above is what?

I can't figure this out can someone please help me thanks!

2007-07-21 05:35:54 · 2 answers · asked by Stephanie S 1

2007-07-21 05:27:52 · 3 answers · asked by Anonymous

Where can you buy/find them?

2007-07-21 05:16:47 · 6 answers · asked by asdfhfdgx 1

When you mix mentos with coke, why does it like "explode?"

2007-07-21 05:07:36 · 4 answers · asked by X_nOmAd_oo57-ha 3

heat is produced while we burn waste paper,quantity that is produced is required.

2007-07-21 05:00:54 · 2 answers · asked by PIJUSH M 1