Chemistry - December 2007

1.Hydrochloric acid solution and sodium hydroxide solution are mixed in a container. The reaction is allowed to occur, and then aqueous silver nitrate is added to the same container. Assuming that everything reacts completely (none of the starting compounds are left after they react), what compounds are present in the container at the end of the experiment?

2. If copper(I) sulfide is partially roasted in air (reacts with O2), copper(I) sulfite is first formed. Subsequently, upon heating, the copper(I) sulfite thermally decomposes to cuprous oxide and sulfur dioxide. Write balanced chemical equations for these two reactions.


answers would be nice, but just teaching me or walking me through how to do these problems are great as well.

2007-12-12 07:13:22 · 2 answers · asked by rocko 1

2007-12-12 07:09:26 · 3 answers · asked by shamu 1

The eVolution car uses compressed gas to run a 2 cylinder car. It claims to be emission free. But it’s not as the gas is compressed with electricity, the emission is transferred to the Thermal Plant that produces the electricity to compress the gas.

So I was looking for a benign chemical reaction that can produce a gas in an enclosed cylinder so that it can be used as a compressed gas to power a vehicle. A Gas Pressure of 4500 psi , preferably a Gas that is not noxious or environmentally detrimental. Fermentation produces Co2 which is again a greenhouse gas. How about the gas in Air Bags? Do you know of any chemical reaction that would be viable for this purpose.

http://news.bbc.co.uk/1/hi/world/africa/988265.stm

http://auto.howstuffworks.com/air-car1.htm

Thank you for your time

2007-12-12 07:07:16 · 5 answers · asked by Anonymous

I am writing a paper on chemical reactions and wanted to know who discovered valence shells/valence electrons? Which scientist and in what year?
Thanks! :)

2007-12-12 07:00:34 · 3 answers · asked by Jane 1

Calculate the equilibrium concentrations of L, M, and N if a system containing, initially, 2 mol of L and 2 mol of M dissolved in 24 dm3 of a suitable solvent, is allowed to reach equilibrium at STP.

2007-12-12 06:53:43 · 1 answers · asked by Jerome D 1

im in 11th grade chem 1 honors and our teacher never shows up to class to help, what is titrate and what is methyl orange? will i be able to find these? and what how would we test .1N HCL?

2007-12-12 06:47:25 · 1 answers · asked by Gello 1

2007-12-12 06:36:52 · 4 answers · asked by danasha 1

2007-12-12 06:26:54 · 8 answers · asked by Jerome D 1

2007-12-12 06:26:43 · 1 answers · asked by CLAUDYNA C 1

2007-12-12 06:25:03 · 3 answers · asked by CLAUDYNA C 1

IF WATER IS H2O HOW COME WHEN WATER THAT IS CALLED DEAD CAN STILL BE SEEN AND HAS NOT CHANGED INTO HYDROGEN GAS WHEN IS SUPPOSED TO BE OXYGEN DEPLETED

2007-12-12 06:15:12 · 5 answers · asked by gaza 1

2007-12-12 06:08:56 · 5 answers · asked by Daniel P 2

How many grams of hydrogen will be given at dissolution 150g of zinc in hydrochloric acid

2007-12-12 04:24:58 · 4 answers · asked by jammal hines 1

I want to blow up some stumps at my house but obviously you can't buy stuff like that anymore.

2007-12-12 04:01:31 · 3 answers · asked by Billy Bob 2

Molecules are often not composed of one single type of atom. Atoms, almost the smallest building blocks of all life, join together with different types of atoms, and form compounds.

2007-12-12 03:07:43 · 4 answers · asked by Lily 2

please help!!!!!! thanks so much...!!!

2007-12-12 03:06:30 · 3 answers · asked by im_iz bust it baby>3 2

2007-12-12 02:56:57 · 9 answers · asked by universe 1

If the crytal was held at an angle of 18.0o to the beam. What was the wavelength of the X-ray radiation in nm ?

2007-12-12 02:28:27 · 3 answers · asked by chemical.garry 1

A. The hydrocarbon burns completely, producing 7.2 grams of water and 7.2 liters of CO2 at standard conditions. What is the empirical formula of the hydrocarbon?

B. Calculate the mass in grams of O2 required for the complete combustion of the sample of the hydrocarbon described in A.

C. The hydrocarbon dissolves readily in CHCl3. The freezing point of a solution prepared by mixing 100 grams of CHCl3 and .6 grams of the hydrocarbon is -64 degrees celsius. The molal freezing point depression constant of CHCl3 is 4.68 degrees celsius/molal and its normal freezing point is -63.5 degrees celsius. Calculate the molecular weight of the hydrocarbon.

D. What is the molecular formula of the hydrocarbon?

2007-12-12 02:14:19 · 1 answers · asked by Mike K 1

The ΔG° for the following reaction is +70.9 kJ.

SO3(g) → SO2(g) + 1/2ΔO2(g)
Given ΔG°f[ SO3(g)] = -371.0 kJ/mol, calculate ΔG°f [SO2(g)].

a.+441.9 kJ/mol
b.-300.1 kJ/mol
c.-5.23 kJ/mol
d.+300.1 kJ/mol
e.+5.23 kJ/mol

2007-12-12 02:13:38 · 1 answers · asked by Anonymous

I am really stuck on this question for my chemistry homework.
Please Help
x

2007-12-12 01:59:48 · 1 answers · asked by Anonymous

in purification by distillation

2007-12-12 01:58:43 · 3 answers · asked by lynxelaine 1

2007-12-12 01:30:21 · 2 answers · asked by trek trek 5

if bubba has a pile of barium chloride weighing 200 greams, how many grams of water are in the sample?

barium cloride formula is BaCl2*2H2O
* is a dot in the middle of the two but i cant find something to make it-.-

2007-12-12 01:26:47 · 2 answers · asked by Shayna M 1

...

2007-12-12 01:24:27 · 3 answers · asked by Shayna M 1

the final emission will be water again, as you mix the hydrogen and the oxigen with air and spark it

2007-12-12 01:10:26 · 8 answers · asked by Anonymous

2CO + O2 -> 2CO2
In a 1.00 L flask, 2.4 atm of CO reacts with 4.5 atm of O2. Assuming that the temperature remains constant, what is the final pressure in the flask?

2007-12-12 00:46:34 · 4 answers · asked by Jessy 3

A helium-filled balloon is let out into the atmosphere. It is made out of a "super" material that will allow it to compress and expand indefinitely - without leaking or exploding. Will the balloon expand/compress? What will happen to the balloon as it rises? At what point, if any,will stop?

2007-12-12 00:12:02 · 4 answers · asked by Anonymous

2007-12-11 23:45:31 · 2 answers · asked by Anonymous

Once it starts boiling, will heating it longer make it any hotter, or am I just wasting time and energy?

2007-12-11 23:32:37 · 5 answers · asked by HoyaDoc 4