Chemistry - March 2007

2007-03-24 16:13:22 · 3 answers · asked by dundledee 2

Starting with 10.3 ml of 3.40 × 10−2 M BaCl2, how many grams of ZnSO4 can be added to the solution before BaSO4 begins to precipitate ? (Nothing else is given; Give a complete answer or don't attempt to answer at all)

2007-03-24 16:04:20 · 2 answers · asked by Marty Kay 2

To isolate benzoic acid from a bicarbonate solution, it is acidified with concentrated hydrochloric acid, as in exp 1. What volume of acid is needed to neutralize the bicarbonate?

2007-03-24 16:00:55 · 1 answers · asked by diana t 1

it's from the previous question

2007-03-24 15:50:12 · 10 answers · asked by yasmina m 1

2007-03-24 15:47:09 · 8 answers · asked by lonelycatskillgirl 1

is the molecule ch3oh polar?

2007-03-24 15:27:09 · 6 answers · asked by dundledee 2

When the following reaction is balanced in acid solution using the lowest possible whole number coefficients, the coefficient of H+(aq) will be:

Cr2O7 (2-)(aq) + CH3OH(aq) --> Cr3+(aq) + HCO2H(aq)

I think i have one half reaction right, but thats it. An answer would be appreciated.

3e- + 14H+ Cr2O7 (2-) = 2Cr + 7H2O

2007-03-24 15:24:57 · 1 answers · asked by Anonymous

Does anyone know what the goo is made out of that when squeezed, it turns hard and when set for a few seconds, it gets liquidy?
(not the goo made out of glue)

2007-03-24 15:23:48 · 7 answers · asked by junior_fan 3

2007-03-24 15:11:05 · 4 answers · asked by Andrew S 1

Select all that apply and tell me how you did it!! Thanks

(a) Na+ and Ba2+

carbonate
iodide
nitrate
strong acid
strong base
sulfate
sulfide


(b) K+ and Pb2+

carbonate
iodide
nitrate
strong acid
strong base
sulfate
sulfide


(c) Zn2+ and Hg2+

carbonate
iodide
nitrate
strong acid
strong base
sulfate
sulfide

2007-03-24 14:39:05 · 4 answers · asked by Hadeer S 1

2007-03-24 14:07:48 · 5 answers · asked by brandon 5

2007-03-24 13:52:52 · 1 answers · asked by Abby H 1

I just downloaded the Folding@Home program (if you don't know what it is, it's the program that uses "Distributed Computing", combining the power of all the home computers running it to form a huge network with more power than a supercomputer that tries to figure out all the world's problems, such as Alzheimer's and stuff) and while it's running, the window shows what appears to be "molecule" things, like it's actually doing something.

Is that just for show, or is it actually working on something? I mean what you SEE. It looks like a model of something you'd see in chemistry class, a bunch of molecules.

I know that it's doing something, but is what you're seeing ACTUALLY what it's doing?

2007-03-24 13:41:54 · 1 answers · asked by me 1

2007-03-24 13:27:28 · 4 answers · asked by kkearney12iu 2

2007-03-24 12:28:57 · 4 answers · asked by vinny w 1

And no i dont mean look in the elements period. I mean how to prove it

2007-03-24 12:19:04 · 2 answers · asked by chizee 1

Is it helpful or is it a waste of money? I have to take basic college chemistry and organic chemistry and I suck at chem. Next semester starts in 1.5 months and I wanted a head start in learning chemistry.

2007-03-24 11:59:01 · 3 answers · asked by Shayna 2

2007-03-24 11:48:25 · 1 answers · asked by Anonymous

A 0.9% NaCl (saline) and 5% glucose solutions are considered isotonic to red blood cells. But what will happen to red blood cells placed in a 0.9% glucose solution?

2007-03-24 11:19:38 · 7 answers · asked by Nat 1

I know it's when the spots dry,

but I want to know SPECIFICALLY what in the water is making the spots. Is it salts? Or something else?

2007-03-24 11:03:56 · 2 answers · asked by SonoranDesertGirl 3

2007-03-24 10:56:11 · 3 answers · asked by Lina 1

which could be carried out in the lab to distingwish between the following pairs of compounds.
NAI and NABR,
K2CO3 and K2SO4,
CH3CH3 and CH2=CH2,
CH3CH2OH and CH3CH2OCH2CH3,
OH and CH3CH2OH,

2007-03-24 10:53:33 · 3 answers · asked by asphenry 1

what is the theaorectical yield(in grams) of TNT when 3.80g of toluene is reacted with 5.80g of nitric acid?

2007-03-24 10:44:49 · 1 answers · asked by asphenry 1

(a) Calculate the percent ionization of 0.0040 M butanoic acid (Ka = 1.5 10-5).
%

(b) Calculate the percent ionization of 0.0040 M butanoic acid in a solution containing 0.085 M sodium butanoate.
%

2007-03-24 10:38:46 · 2 answers · asked by chester_k_guidry 2

According to my book:

"If the air is sufficiently dry and the water vapor is allowed to move away from the glass once it escapes from the liquid, the vapor pressure of the water will always be greater than the partial pressure of the air due to water. So water vapor will continue to slowly escape from the water until water is gone."

Can some explain it in simpler terms so I can understand it XD?

2007-03-24 09:50:28 · 5 answers · asked by Mitur 2

explain how vinegar and lemon juice can be used to reduce the odour of fish
please give me a chemistry explanation, know the answer , need help explaining it (acid-base reacts, so...)
thanks!!

2007-03-24 09:31:06 · 2 answers · asked by Anonymous

What is the net equilibrium constant for dissolving AlPO4 in NaOH ?

Enter an answer in two significant figures.

2007-03-24 09:26:12 · 4 answers · asked by raindrops414 1

why is a test tube that only has enzyme solution and diluted water used as a control (the other test tube has catechol, enzyme, and diluted water). why is the one only with the enzyme used as a control (or why is it a control)?

i dont understand? just to prove that the enzyme reaction will still occur without the catechol?

2007-03-24 09:21:10 · 2 answers · asked by Anonymous

or is it colourless?

2007-03-24 09:08:58 · 10 answers · asked by dykeyhett 2

2007-03-24 09:01:28 · 2 answers · asked by hilary 2