Chemistry - November 2006

i m a student of chemistry at ust bannu NWFP PAKISTAN.

2006-11-25 06:13:36 · 0 answers · asked by Anonymous

For example: "Arsenic's a sure fine way to deal with a nasty rat, It works better than a mean old cat."

2006-11-25 05:55:33 · 3 answers · asked by adair124 1

For propanoic acid (HC3H5O2, Ka = 1.3 10-5), determine the concentration of all species present, the pH, and the percent dissociation of a 0.114 M solution.
[HC3H5O2]
M
[C3H5O2-]
M
[H+]
M
[OH -]
M
pH

percent dissociation
%

2006-11-25 05:51:24 · 1 answers · asked by tanny 1

plz i need it now if u can help its really important

2006-11-25 05:40:31 · 3 answers · asked by Saba F 1

A solution is prepared by adding 48.8 mL of concentrated hydrochloric acid and 17.5 mL of concentrated nitric acid to 300 mL of water. More water is added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution. [Hint: Concentrated HCl is 38% HCl (by mass) and has a density of 1.19 g/mL; concentrated HNO3 is 70.% HNO3 and has a density of 1.42 g/mL.]
how do i find pH

2006-11-25 05:28:02 · 2 answers · asked by smile 1

AgNO3 + NaNO3 ->

2006-11-25 05:21:24 · 4 answers · asked by ? 2

2006-11-25 05:19:38 · 4 answers · asked by the professor 2

2006-11-25 05:17:31 · 1 answers · asked by heehehe p 2

regarding:
0.269g of Nitric Acid (HNO3) are added to 36.3mL of 1.18M Nitric Acid solution. Assuming there is no change in volume, calcuate the final concentrations of ions.
-Would the [H+]=1.18M ; [NO3-]=1.18M?
-I think the molarity of .269g HNO3 is equal to .149M, but the problem says that Nitric Acid has Molarity of 1.18M, which is where the confusion kicks in. Am I supposed to find some strange correlation between these numbers, or just disregard the difference? Anyway, is my answer at all on target?

ALSO-

What are the concentrations of ions in 0.015M Potassium Sulfate (K2SO4)?
It couldn't be as simple as... [K+]=0.03M ; and [SO4 2-]=0.015M...could it?

please and thank you!

2006-11-25 05:05:37 · 1 answers · asked by Anonymous

period 2 is reactive period13 is less reactive period 18 is not eactive period 17 is very reactive 16 is reactive 15 is less reactive what about 14 and am i right please help me out

2006-11-25 04:55:29 · 3 answers · asked by Anonymous

It's for my science home work, I have to name 4 everyday mixtures, can you please help?

2006-11-25 04:54:09 · 8 answers · asked by MeMyselfAndI 2

hydroxyl group, amine group, cardonyl group, carboxyl group

2006-11-25 04:33:22 · 2 answers · asked by Anonymous

CH3
|
CH3-C-NH2
|
H
acid, amine, amide, ester

2006-11-25 04:30:24 · 3 answers · asked by Anonymous

My answer was 3-methyl-2-pentene ..why is this wrong?

2006-11-25 04:23:39 · 3 answers · asked by Kiya 2

Assume both molecules to have the same R groups, and explain the reason, please =D

2006-11-25 04:12:45 · 2 answers · asked by Tony H 1

1c. what do we get from burning fuels?
2.Two pupils used different kinds of metal for the electrodes to see which combination of metals gave the highest voltage.
Write down two things they should do to make sure their investigation is a fair test,
3.Hydrogen can beused as a fuel for cars and other vehicals.
a.Why does hydrogen produces less pollution than hydrocarbon fuels when it is burnt?
b.Give 2 disadvantages of using hydrogen as a fuel.

2006-11-25 04:05:08 · 7 answers · asked by Minnie 2

CH3 |
CH3CH2CCH3
|
CH3

is... CH3CH2(CH3)3, CH3CH2H2(CH3)2CH3, CH3CH2H2CH2CH2CH3, or none of the above

2006-11-25 04:04:57 · 1 answers · asked by Anonymous

2006-11-25 04:01:15 · 5 answers · asked by ali moha 1

what kind of chemicals used for such process also the operating conditions required

2006-11-25 03:57:53 · 1 answers · asked by nasima hussain 1

I know that gram atomic mass deals with elements' atomic mass expressed in grams, and that this number in grams is also how much 1 mole of that element weighs. So my question is, does gram molecular mass and gram formula mass tell you how much 1 mole of that molecule or complex molecule weighs?

Thanks :)

2006-11-25 03:03:25 · 3 answers · asked by Anonymous

What happens if you you mix hot lava (from a volcano) with liquid nitrogen?

2006-11-25 03:02:49 · 5 answers · asked by User 3

please help me

2006-11-25 02:48:48 · 7 answers · asked by subin m 1

also does fruit juice contain enough vitamin C / ascorbic acid to convert sodium benzoate to benzene, at he right temperature?

2006-11-25 02:44:35 · 5 answers · asked by Les 1

I know that all chemicals are dangerous, no matter how safe they are, but i would like to know how dangerous thionin is. is it moderately dangerous, slightly dangerous, or extremely dangerous? Explain please.

2006-11-25 02:43:35 · 1 answers · asked by musical_genius 3

for chemists ,and pharmacist

2006-11-25 02:06:23 · 6 answers · asked by TUT 1

2006-11-25 01:39:47 · 4 answers · asked by furches8 1

2006-11-25 01:36:37 · 5 answers · asked by Lindsay A 1

a) acetic acid
b) butyric acid
c) benzaldehyde
d) formaldehyde

2006-11-25 01:35:04 · 4 answers · asked by Lindsay A 1

2006-11-25 01:33:40 · 2 answers · asked by Lindsay A 1

a) benzene
b) acetic acid
c) salicylic acid
d) ethanol

2006-11-25 01:32:53 · 3 answers · asked by Lindsay A 1