Chemistry - March 2007

What theories or methods could one use to separate H2O so the hydrogen and oxygen could be stored separately?

2007-03-04 05:43:13 · 5 answers · asked by dolphinparty13 2

2007-03-04 05:40:30 · 1 answers · asked by redalert 2

if uranium needs to be mined from the earth, wont it run out some day? and if what will replace it? there has to be something or else they wouldnt call nuclear energy a renewable resource.

2007-03-04 05:23:20 · 5 answers · asked by melodyislove 2

I am having a hard time with this question. I

A) atoms of metals form bonds to atoms of nonmetals.
B) oppositely charged ions are held together by strong electrical attractions.
C) atoms of noble gases are held together by attractions bettween oppositely charged ions.
D) atoms are held together by sharing electrons.
E) atoms of different metals form bonds.

2007-03-04 05:10:55 · 4 answers · asked by shortydidi03 2

2007-03-04 05:05:15 · 1 answers · asked by chemstudent 1

plz plz plz plz answer as many questions as u can answer from these question?? u can gimme links to websites where i can find the answers

1) how is ceramics prepared in a pure form?
2) how is ceramics used in an industrial setting?
3) What is the historical development of ceramics?
4) What are the advantages of ceramics in a particular industrial application?
5) What are the pertinent physical and chemical properties of ceramics?
6) What is the future of ceramics?
a) better product development?
b) Phasing out of ceramics and replacement with something better?
c) Current investment opportunities

2007-03-04 05:03:32 · 2 answers · asked by Preeya 5

When sodium hydrogen carbonate reacts with citric acid, what gas is given off?

2007-03-04 04:53:49 · 3 answers · asked by greenpotterboy 2

2007-03-04 04:50:24 · 3 answers · asked by Josh 1

NO ANSWERS LIKE GO TO WIKIPEDIA PLZ
What were rutherford's specific contributions to society?

2007-03-04 04:47:21 · 3 answers · asked by Jose H 1

2007-03-04 04:37:53 · 4 answers · asked by Lovely Lady 1

its science homework
so i suppose iron would be solid
carbon dioxide is gas
i think this is correct

2007-03-04 04:08:54 · 23 answers · asked by michelle e 1

2007-03-04 03:57:17 · 10 answers · asked by michelle e 1

2007-03-04 03:46:09 · 7 answers · asked by pao2 1

2007-03-04 03:27:33 · 6 answers · asked by Anonymous

In the reaction between sodium saccharin and iodoethane (a nucleophilic substitution reaction) two products are formed, O-ethylsaccharin and N-ethylsaccharin. My textbook states that N-ethylsaccharin is more stable, but doesn't say why. Does anyone know why?

2007-03-04 03:24:04 · 1 answers · asked by birdbrained22 2

A. electron sharing between adjacent atoms
B. the attraction of polar molecules
C. a gas of freely-moving electrons
D. electron transfer between adjacent atoms

2007-03-04 03:09:05 · 2 answers · asked by SpiderMan 1

i dont know whether this should be in Science-but why can you not refreeze food and reheat until it is used up?what happens when you defrost and reheat to the molecules in the food?
My health rests on your answers ;)
Just kidding!

2007-03-04 03:04:35 · 6 answers · asked by Anonymous

A gas whose formula is NH3
B. gas whose formula is NH4
C. liquid whose formula is NH3
D. liquid whose formula is NH4

2007-03-04 03:00:17 · 2 answers · asked by SpiderMan 1

I watch a film about alchemy. It's cool. The alchemist could produce a fire with just drawing an diagram. Where could i learned it if it real exist? Gave me the site too.

2007-03-04 02:34:53 · 3 answers · asked by Ice 2

A compound contains only carbon, nitrogen, hydrogen and oxygen. Combustion of 0.157g of that compound produced 0.213g of CO2 and 0.0310g of H2O. In another experiment, 0.103g of that compound produced 0.0230g of NH3. What is the empirical formula of the compound?

2007-03-04 02:23:54 · 3 answers · asked by Leo L 2

2007-03-04 02:11:58 · 3 answers · asked by Tiffany Jade 1

four (4.0) liters of helium gas have a pressure of 800.0 torr. what will be the new pressure if the volume is reduced to 1.0 liter. (n and t constant) . ?

2007-03-04 01:54:43 · 3 answers · asked by ? 1

Thank you

2007-03-04 01:53:50 · 3 answers · asked by Anonymous

A balloon contains a gas with a pressure of 580 mm Hg and a temp of 227 deg cels. what is the new pressure (mm Hg) of the gas when the temp drops to 27 deg cels( v constant) ?

2007-03-04 01:51:08 · 2 answers · asked by ? 1

A sample of helium gas has a pressure of 860 mm Hg at a temp of 225 K. what pressure (mm Hg) will the helium have when the temp of the sample reaches 675 K (v constant) ?

2007-03-04 01:49:11 · 1 answers · asked by ? 1

A large balloon has a volume of 2.5 L at a temp of 0 degrees cels. what is the new volume of the balloon when the temp rises to 120 degrees cels. when P remains constant?

2007-03-04 01:44:32 · 3 answers · asked by ? 1

When the reactants are
Lead nitrate formula pb(NO3)2
Potassium Chromate formula K2CrO4

A explanation will be useful for this reaction.

Thanks, this is part of GCSE Science Coursework.

2007-03-04 01:15:43 · 4 answers · asked by Anonymous

2007-03-04 00:55:27 · 4 answers · asked by j y 2

Here is a question.
Taking valency of 02 as 2,Derive the valency of Nitrogen in -
N2O,NO,NO2
Please explain.

2007-03-04 00:53:08 · 3 answers · asked by Anonymous

what does part of it by weight actually maen in equivalent weight of element? give answer in detail.

2007-03-04 00:37:30 · 2 answers · asked by rajesh karki 1