Chemistry - December 2006

2006-12-03 02:41:59 · 8 answers · asked by Anonymous

im going to compete in an international science fair and my project needs an experiment where we have to simulate the conditions in the stratosphere above antarctica ( where the ozone depletion is in its highest stages) (conditions like temperature, amount of UV radiation ... etc .. any advice ??

2006-12-03 01:59:05 · 1 answers · asked by Anonymous

Is fuel (gasoline) conductive?
why dosen't a (automotive) fuel pump cause an explosion inside an autos fuel tank when voltage is applied?
the pump is located in the tank and submerged in the fuel some of the time(full tank), some of the time it is exposed to the fumes in the tank when the tank is low. Also the wires that go to the pump are exposed to the fuel, meaning the fuel is in contact with the terminals of the pump. The wires are not sealed from the fuel.
The pump is not always submerged in the fuel as when the car is low on fuel !! And "if" the fuel is conductive, why dosen't it short out the EXPOSED terminal ends on the pump, and cause the pump to short circuit???
the voltage going to the pump is at least 12 volts dc with about 5 amps.

2006-12-03 01:56:07 · 3 answers · asked by chris 2

2006-12-03 01:40:33 · 3 answers · asked by John M. 1

2006-12-03 01:32:00 · 1 answers · asked by John M. 1

2006-12-03 00:04:28 · 6 answers · asked by kafka 1

Positively charged sub-atomic particle?

2006-12-02 23:37:23 · 2 answers · asked by Junji 1

I don't want to buy an expensive software in order to visualize it. Ideally it would be in protein database format (pdb) although I am not sure that my computer with Chem3D 7.0 can handle that much atoms.

2006-12-02 23:21:21 · 3 answers · asked by Joseph Binette 3

no idea

2006-12-02 22:19:41 · 9 answers · asked by Anonymous

I need this for an essay I am writing and i need some views on would people think

2006-12-02 22:15:31 · 5 answers · asked by Soulja 1

what are the products

2006-12-02 22:04:13 · 6 answers · asked by kamita 1

Mg + CO2 =

2006-12-02 21:20:47 · 5 answers · asked by Anonymous

For statements a) through d) use the reaction:


SiCl4(l) + 2Mg(s) --> 2MgCl2(s) + Si(s)



a) Mg is the reducing agent

b) SiCl4 is the reducing agent

c) Mg is reduced

d) SiCl4 (or Si in SiCl4) is reduced

e) Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g) is a redox reaction

f) O3(g)(aq) + NO(g) --> O2(g) + NO2(g) is a redox reaction

2006-12-02 21:13:14 · 3 answers · asked by purple222 2

name some sites or references that help me.

2006-12-02 20:46:59 · 1 answers · asked by noga_4ever _ 1

2006-12-02 20:22:50 · 3 answers · asked by jags 1

34)
convert the following values into mm Hg:
a. standard pressure
b. 25.3 psi
c.7.5 atm
d. 28.0 in. Hg
e. 41.8 Pa

2006-12-02 20:08:59 · 2 answers · asked by femylatina 1

2006-12-02 20:07:36 · 1 answers · asked by cindy l 1

in other words, what is "Heavy water's" role in a nuclear reaction?

2006-12-02 19:42:42 · 3 answers · asked by Anonymous

2006-12-02 19:29:29 · 2 answers · asked by maelleno14 1

2006-12-02 19:19:52 · 2 answers · asked by vindu r 1

2006-12-02 18:32:46 · 8 answers · asked by Anonymous

2006-12-02 18:21:51 · 2 answers · asked by Anonymous

A newly discovered element M, has the valence eletronic configuration of 8s1. In which group and period will this element be place?

2006-12-02 17:59:00 · 4 answers · asked by Tavis T 1

2006-12-02 17:27:20 · 2 answers · asked by Steven I 1

2006-12-02 17:13:44 · 2 answers · asked by StarsInMyEyes 1

Clearly they knew these values in the early 20th century, even late 19th. How did they figure it out??

2006-12-02 17:12:00 · 3 answers · asked by HomeSweetSiliconValley 4

I know one end of the oleic acid molecule has a slightly positive charge, and the other end has a slightly negative charge, but I don't know which. I know the carboxyl end is hydrophillic and is attracted to water, but does that make it postive? I have heard that water has a negative charge, but I have also heard that it is neutral.

2006-12-02 16:55:28 · 1 answers · asked by Michael F 1

i hvae a chemistry project about nuclear medicine. i have to answer these 3 questions:

1. What radiation is emitted when performing Nuclear Medicine?

2. Which isotopes do you use? How do decide which ones to use?

3. What are some major risks when experimenting with nuclear medicine?

Also, if you know, is there any type of Quantitative data i can gather from anything in nuclear medicine?

PLEASE help....if you know ANY of this, plz post an answer.
thanks!!!

2006-12-02 16:38:06 · 4 answers · asked by Anonymous

hello! so in my handout, the equation is
2Na + Cl (2) --> 2NaCl
the (2) means it's subscript 2
and then it says:
If you want to make 82.59 grams of sodium chloride, how many grams of each reactant are you going to need? Write both answers as complete sentences.
i got the sodium thing, yes. but for chlorine i'm not sure how it works because it's a gas, right? so am i supposed to have the ratio be 1 L Cl (2) / 2 mol NaCl
or should i just leave the ratio like 1 mol Cl / 2 mol NaCl?

2006-12-02 16:37:54 · 1 answers · asked by Anonymous

Can anyone specifically tell me what ahppens when a lead storage battery is recharged?

2006-12-02 16:35:17 · 4 answers · asked by Anonymous