Chemistry - September 2007

where can i find pottasium nitrate in souther california

2007-09-19 17:40:25 · 2 answers · asked by Anonymous

for chemistry

2007-09-19 17:38:38 · 4 answers · asked by SLIFOX 3

Total molar concentration of ions in, assuming complete dissociation.

.750 M solution of K2CO3

.355 M Solution of AlCl3

2007-09-19 17:09:55 · 1 answers · asked by yankeesruleee 2

A 1.50g sample of nitrous oxide (an anesthetic, sometimes called laughing gas) contains 2.05 * 10^22 N2O molecules. how many nitrogen atoms are in 1.00g of nitrous oxide?

2007-09-19 16:30:21 · 2 answers · asked by kennilope 3

The flame is normally blue. Does the fact that there is salt in the kettle have anything to do with it?
.

2007-09-19 16:29:28 · 9 answers · asked by Wise@ss 4

Does anyone know where to start to setting up an experiment where I would have to find the density of 10 objects and then arrange them in order from most dense to least dense. There are cubes, balls, all different shapes. What would I have to do to find the density of each? Thanks.

2007-09-19 15:54:40 · 4 answers · asked by Trace T 1

2007-09-19 15:33:18 · 3 answers · asked by myron k 1

Magnesium metal reacts with HCl solution, liberating H2 gas and generating Mg2+ cations in solution. A 1.015-g sample of Mg metal is added to 50.0 mL of a 4.00 M HCl solution, and the reaction goes to completion. How many g of H2 are formed?

THX A LOT FOR HELPIN ME..I REALLY APPRECIATE IT GUYSS! IT'S DUE TOMORROW...N I HAVE NO CLUE WHT TO DO!!

2007-09-19 15:26:32 · 5 answers · asked by Anonymous

what is the density of a 5 g piece of metal that has a volume of 2cm

2007-09-19 15:22:39 · 7 answers · asked by Anonymous

I must not be doing this right because I'm not getting any of these answers. please help! :(
The problem:

The lattice enthalpy of AgF is 971 kJ*mol and the hydration enthalpy is -993kJ *mol. Estimate the enthalpy of solution AgF.
A) -993kj*mol
B) -971 kj*mol
C) -1964kj*mol
D) +22kj*mol
E) -22kj*mol

2007-09-19 15:06:29 · 2 answers · asked by ___ 1

2007-09-19 15:04:40 · 1 answers · asked by Updated Life th13f 2

The rules state that subscripts cannot be added or changed:
However in the question a subcript has been added:
Balance this equation and show in molecular form
lead(II)nitrate+sodium chloride-->
answer: Pb(NO3)2+2NaCl->
PbCl2(s)+2NaNO3
A subscript has been added against Cl in PbCl which goes againist the rules.

I hope somebody can help!!

2007-09-19 15:03:43 · 7 answers · asked by Gideon 1

2007-09-19 15:03:34 · 4 answers · asked by princess 1256 1

2007-09-19 14:54:30 · 2 answers · asked by anonamuss 2

Menthol ( = 156.3 g/mol), a strong-smelling substance used in cough drops, is a compound of carbon, hydrogen, and oxygen. When 0.1595 g menthol was subjected to combustion analysis, it produced 0.449 g CO2 and 0.184 g H2O. What is its molecular formula?

2007-09-19 14:35:47 · 2 answers · asked by neena m 1

#1 Specify what ions are present in solution upon dissolving each of the following in water:
a) zinc chloride
b) nitric acid
c) ammonium sulfate
d) calcium hydroxide


#2 Formic acid, HCHO2, is a weak electrolyte. What solute particles are present in an aqueous solution of this compound? Write the chemical equation for the ionization of formic acid.

2007-09-19 14:29:38 · 3 answers · asked by joey 1

You are presented with three white solids, A, B and C, which are glucose (a sugar substance), NaOH,
and AgBr. Solid A dissolves in water to form a conducting solution. B is not soluble in water. C dissolves in water to form a nonconducting solution. Identify A, B, and C.

2007-09-19 13:11:53 · 2 answers · asked by joey 1

Calculate the empirical formula of a compound that has the following percent composition: 7.195% P and 92.805% Br.

Work would be appreciated,

thank you very much

2007-09-19 13:00:16 · 4 answers · asked by aaadaj 1

2007-09-19 12:49:48 · 3 answers · asked by J L 2

Something edible...related to a food ingredient... ..for a recipe

2007-09-19 12:42:18 · 9 answers · asked by ? 2

2007-09-19 12:42:05 · 2 answers · asked by Andre T 1

this has to do with the cycle of copper reactions experiment

2007-09-19 12:28:38 · 1 answers · asked by preppy_airhead 2

how would i seperate a mixture of water, sand, and sodium chloride? thanks!

2007-09-19 12:21:27 · 2 answers · asked by Andrea 1

What is the definition of volume and mass?
Can you answer these questions which tools would you use to find each?-
The mass of a rock.
The time it takes to sharpen a pencil
The amount of liquid in a jar
The length of a desk
The temperature of the air

2007-09-19 12:16:34 · 1 answers · asked by ? 2

isn't that right?
(just need confirmation)

2007-09-19 12:16:06 · 2 answers · asked by C'est Comme Un Rêve 3

i need help w/a couple ? on my chemistry hw by tonite!
here they are:

1) why does ionization energy tend to decrease from top to bottom within a group??


2)why does ioniztion energy tend to increase as you move across a period??


3)there is a large increase between the second and third ionization energies of metal. What kind of ion is the metal most likely to form? Include charge in your answer.


okey dokey, thats all, thanx so much, adn pleeeze try to ge these back to me w/in the next few min, b/c im extremley tired and sick so i want to go to sleep!

2007-09-19 11:17:51 · 1 answers · asked by this calls for a careface 2

2007-09-19 10:51:46 · 10 answers · asked by step 2

dealing with a chem lab

2007-09-19 10:48:52 · 7 answers · asked by britt 1

The meat from a hazelnut has a mass of 0.985 g.
A.) what is the mass of a millionth of a mole (10^-6---aka a micromole) of hazelnut meats?
B.)How many moles are in a pound of hazelnut meats?

2007-09-19 10:25:39 · 1 answers · asked by mary s 1

Consider three 10-g samples of water: one as ice, one as a liquid, and on as vapor. How do the volumes of these three samples compare with one another? How is this difference in volume related to the physical state involved?

2007-09-19 10:19:06 · 2 answers · asked by Ryoma Echizen 3