Chemistry - July 2007

2007-07-15 11:25:19 · 5 answers · asked by justask23 5

heres a few problems
1)CaF2
2)Fe(OH)2
3)NO2
4) Al2(SO4)3
5)NH4NO3
6)SF2

2007-07-15 11:21:54 · 4 answers · asked by HelloHeyHi 1

2007-07-15 11:11:35 · 2 answers · asked by mastalee103 3

2007-07-15 09:39:05 · 2 answers · asked by waynne8 1

Link me a picture please.

2007-07-15 09:35:46 · 1 answers · asked by ninedone91 1

lithium metal reacts with water to give lithium hydrogen gas. if 275 mL of hydrogen gas is produced at STP, what is the mass of lithium that reacted?

2007-07-15 09:30:32 · 1 answers · asked by poonam 1

2007-07-15 09:28:40 · 1 answers · asked by poonam 1

2007-07-15 08:18:49 · 10 answers · asked by Einheart 2

Out here in good ol' Afghanistan we are wondering why some water bottles freeze over when you take them out of the freezer or when you open them. I would think that if the water was frozen that it would freeze while it was in the freezer, but sometimes as soon as you

2007-07-15 08:15:48 · 2 answers · asked by Anonymous

2007-07-15 08:15:26 · 3 answers · asked by Anonymous

Anyone know a quick formula for this that is easy to remember? Or a decent website to explain calculating theoretical yield.

2007-07-15 07:08:41 · 11 answers · asked by Jules 1

solid magnesium oxide is reacted with solid potassium oxide

2007-07-15 06:57:28 · 2 answers · asked by Drogba 2

Formulas to work with?
delta Tf = (Kf(mole of solute)) / (kg solvent)
delta Tb = Kb (same as above)
Freezing pt. of solution = 0 celcius - delta Tf
boiling pt. = 100 celcius + delta Tb

Kf of H2O = 1.86
Kb of H2O= 0.52
do you use Kb and Kf of H2O?

2007-07-15 06:15:48 · 2 answers · asked by Anonymous

If 0.150 mole of a nonvolatile, nonelectrolyte solute is dissolved in 800 grams of water, what are the ideal melting and boiling points of the solution?
formulas to work with?
delta Tf = (Kf (mole solute)) / kg solvent
delta Tb = Kb of the same
freezing pt. of solution = 0 celcius - delta Tf
boiling pt. of solution = 100 celcius - delta Tb
thank you soooo much

2007-07-15 06:03:00 · 2 answers · asked by Anonymous

I know that cobalt II means that it's Co with a 2+ charge, and sulfate is SO4 with a 2- charge, but is cobalt II sulfate heptahydrate CoSO4 x 7H2O?
what is heptahydrate?!?!?!?!?

2007-07-15 05:17:04 · 5 answers · asked by Anonymous

2007-07-15 05:08:08 · 3 answers · asked by Anonymous

2007-07-15 01:25:34 · 2 answers · asked by pippa 2

2007-07-15 01:12:39 · 4 answers · asked by Wright 2

Our hob gas usually burns blue, just yesterday for a short while it was burning bright orange on all rings. I assume an inpurity in the gas, after 5mins it was burning blue again.

Is anyone able to offer an explanation about why this happened?

2007-07-15 00:29:57 · 5 answers · asked by Anonymous

There was a guy who discovered a seed that when you burn it, the seed catches fire but doesn't burn the hand it's on. It's called the Fuel of the future because it is a substitute for fuel...

2007-07-14 21:39:29 · 1 answers · asked by AV 1

In an experiment, you determined the concentration fo calcium ions in a saturated solution of calcium fuoride to be 2.15 x 10^-4 M. ksp?

2007-07-14 21:27:31 · 3 answers · asked by sandy 1

2007-07-14 19:55:57 · 2 answers · asked by ian f 1

Can Ariel work like a battery? Like with the fruit things where you can get electricity out of the chemical energy from the citric acid? Can you tell me what reactions take place? Or if somebody already tried experimenting on this?

2007-07-14 19:40:28 · 2 answers · asked by stare@u 1

how would you reason this out?

ratio of volumes can be used instead of ratio of molarity in getting the reaction order.

any endo or exothermic reaction is increased by a rise in temperature

a 10oC ris in temperaure is more effective in lower temparatre than in higher temperatures

2007-07-14 18:54:14 · 1 answers · asked by Aj 2

Why does the difference between experimental and calculated value of AgCl's lattice energy is larger than of NaCl's.
p.s. this is under the Born-Haber cycle chapter so i think they are somehow related.
Thanx a lot!

2007-07-14 17:58:05 · 1 answers · asked by mcpheevn 1

2007-07-14 17:55:03 · 12 answers · asked by skand_gpt 1

is electro-positive or
electro-negative?

2007-07-14 17:05:43 · 13 answers · asked by Anonymous

2007-07-14 14:16:33 · 5 answers · asked by Camille D 1

2007-07-14 13:58:35 · 11 answers · asked by STORMY K 3

http://www.duracell.com/oem/Pdf/others/ATB-full.pdf

On page 4 of this website, the diagram shows a cathode and anode current collector. How is this possible when current flows in one direction? Also which way will electrons travel when its supposed to travel in the opposite direction of the current. Please explain. Thnx!

2007-07-14 10:22:30 · 4 answers · asked by Anonymous