Chemistry - December 2007

determine the volume of stock acid required to prepare 500ml of 0.5mol/l hydrochloric acid. Assume the stock acid is 38% by mass hydrogen chloride and has a density of 1190kg/ m3 (1.190g/ml).

2007-12-20 14:11:55 · 4 answers · asked by Anonymous

how much will 3.00 moles of o2 weigh in grams

32.0 grams
_________
1mole

and the harder one is how much volume in l will 56.0 grams of CO(g) have at stp? 1st i have to change gas into moles then i have to change moles into litres

2007-12-20 14:10:46 · 6 answers · asked by Anonymous

when something becomes hydrated. what happens to the molecules?

say u hydrated copper(II) sulfate
do the water molecules become part of the copper sulfate molecules? or what?

it says in a book that

"hydrated salts aren't really different from regular salts, since the water isn't actually a part of the core molecule. It's just a regular salt molecule with a water molecule "stuck" to it that just sort of tags along."

so whats the water molecule doing? and how is it "stuck" to the core molecule ?

2007-12-20 14:00:02 · 3 answers · asked by Anonymous

given the density of concentrated sulfuric acid as 2.21g/ml.

2007-12-20 13:23:30 · 3 answers · asked by yeshila 1

2007-12-20 09:35:59 · 2 answers · asked by lalalala 1

how are you going to solve this..

how many grams of each product could be formed when 0.333mol of cesium sulfide reacts with 0.555mol of manganese III bromide?

2007-12-20 08:45:01 · 4 answers · asked by niQue33 2

2007-12-20 08:24:35 · 4 answers · asked by fast and furious 1

2007-12-20 08:22:22 · 4 answers · asked by Omar K 1

2007-12-20 08:19:00 · 6 answers · asked by Omar K 1

I am trying to get the correct equation between KMnO4 and H2O2, and the equation for KMnO4 and Fe2+. The equation takes place in an acidic solution.

2007-12-20 08:15:35 · 2 answers · asked by Anonymous

The volume of one mole of an ideal gas, at 202kPa and 273 K, is?

I've been trying to use the ideal gas law, but I just can't get what I need. My teacher said that the answer is 11.2 L, but I can't come to that. Any help please?

2007-12-20 07:43:22 · 6 answers · asked by Anonymous

I need help with finding the rate/order of reaction. The question I need help with is:
Rate expression is 2SO2 + O ---> 2SO3
rate = k[SO2]^2[O]
What is the overall order of reaction?

It would be excellent if someone could explain HOW to find the overall order of reaction so I can complete the rest of the questions I have.

2007-12-20 07:40:11 · 3 answers · asked by Anonymous

Hello,

I have two bases (NAHCO3, NA2CO3) and an unknown monoprotic acid. I'm supposed to find the H+ concentration (so, pH, really).

How can I find the pH of this? I have Methyl Red available, but that's it.

What can I do to find the ph??!

2007-12-20 05:22:33 · 2 answers · asked by Sparky222B 2

2007-12-20 04:32:06 · 1 answers · asked by toolmaker 1

Anything that burns, because it is carbonic thats why it is burnable or even if it is not carbonic, the oxyzen in atmosphere is enough to help burn anything.

2007-12-20 04:17:17 · 2 answers · asked by Sonu 2

What is the maximum theoretical yield of ammonia when 280g of nitrogen is reacted with 60g of hydrogen?
H=1
N=7
Please help! I am really stuck!

Thanks!

2007-12-20 02:55:13 · 3 answers · asked by Hanna 2

2007-12-20 02:50:16 · 6 answers · asked by Anonymous

True
False

2007-12-20 02:45:57 · 6 answers · asked by Anonymous

True
False

2007-12-20 02:45:18 · 6 answers · asked by Anonymous

True
False

2007-12-20 02:44:38 · 3 answers · asked by Anonymous

True
False

2007-12-20 02:43:09 · 5 answers · asked by Anonymous

beeswax is obtained from the remains of honeycomb after extracting honey from it.

2007-12-20 02:28:32 · 5 answers · asked by Anonymous

2007-12-20 01:42:34 · 2 answers · asked by Anonymous

CsCL dissolves in water according to
CsCL(s)===>Cs(aq)+CL(aq)
A 0.121m solution of CsCL freezes at -0.403C calculate i and the apparent dissociation of CsCL in this solution

2007-12-20 00:49:27 · 1 answers · asked by Anonymous

2007-12-19 19:12:32 · 2 answers · asked by johnpaul a 1

...such that you could obtain the iodine and dry crystals of magnesium iodide.

The last question I have for my chemistry homework. Help or hints appreciated. =)

2007-12-19 18:13:38 · 3 answers · asked by Unknown Darkness™ 7

Also, is chlorine acidic or basic? What's the world's most powerful base?

2007-12-19 17:15:17 · 0 answers · asked by Anonymous

2007-12-19 16:51:50 · 4 answers · asked by bbyboy16 1

wat are 5 physical properties of hydrogen and two chemical properties of hydrogen?

2007-12-19 15:35:45 · 2 answers · asked by Anonymous

I really need help for a test tomorrow, so if somebody could assist me in figuring this out I'd appreciate it.

A 5.037 g piece of iron heated to 100 degrees Celcius is placed in a coffee up calorimeter that initially contains 27.3 g of water at 21.2 degrees Celcius. If the final temp. is 22.7 degrees Celcius, what is the specific heat capacity of the iron (J/g C)?

2007-12-19 14:37:43 · 1 answers · asked by Craig S 2