Science & Mathematics - 17 October 2006

I understand everything about redox equations like oxidation and reduction how to balance them. Balance the electrons and balance them in acidic and basic solution. But how do you identify spectator ions? Like I know that when an element such as Na is attached to dichromate =
Na2Cr2O7 -2 we must eliminate the Na. I know this but how about this problem:
AuCl3 + NaI > Au + I2 + NaCl

my teacher eliminated all Cl and Na
so AU + I > Au + I2 (why??? eliminate Na and Cl is it because they dont change oxidation states in the reaction???)

why does this occur? ANY help please would be great.

2006-10-17 18:27:37 · 5 answers · asked by avalentin911 2 in Chemistry

2006-10-17 18:16:28 · 3 answers · asked by INDONIO 1 in Medicine

The radiator in your car uses either water or ethylene glycol (anti-freeze) to remove heat from the engine and dissipate it to the outside air. If the water recirculation rate is 20.0 kg per minute and the water temperature leaving the engine and entering the radiator is 98.0 C and the temperature of the water leaving the radiator and entering the engine is 45.0 C

2006-10-17 18:14:03 · 1 answers · asked by Anonymous in Chemistry

can some1 plz explain 2 me abit about dc circuits....i've got an experiment 2day and i've never built a circuit b4...i'm really confused about the multimeter aswell....i dont understand y it says select the appropiate volts...currents..ect.. when i'm using it 2 measure the these values across a component????? some1 explain plz....

2006-10-17 18:09:08 · 3 answers · asked by elli 1 in Physics

Write an equation for the neutralization of H2SO4 by KOH.

2006-10-17 18:00:39 · 3 answers · asked by Anonymous in Chemistry

meaning shooting stars? dose it only happen in certain states or can the whole world see it at the same time?

2006-10-17 18:00:32 · 4 answers · asked by twilight 2 in Astronomy & Space

is it true that they can drink bi carb soda to make the effects of the acid go away? also would those heartburn lolly things work? are they bi carb soda?

2006-10-17 17:58:50 · 6 answers · asked by zimba 4 in Other - Science

2006-10-17 17:52:08 · 6 answers · asked by Anonymous in Biology

I have tried working through all the derivatives but, I think I am getting lost between the 2nd and 3rd. Please help if possible. Thanks

2006-10-17 17:50:31 · 6 answers · asked by wasatchjeeper 2 in Mathematics

2006-10-17 17:39:38 · 17 answers · asked by Erin D 2 in Other - Science

I am looking for a 4th grade nonfiction book for my little sister current event please.

2006-10-17 17:39:22 · 2 answers · asked by Montrease Y 1 in Earth Sciences & Geology

I've got access to some pretty high-tech equipment, and was wondering if electrically charged plasma gas combined with a photon pulse laser could create a real life lightsaber? Any other suggestions on how to create a lightsaber?

2006-10-17 17:38:49 · 6 answers · asked by Anonymous in Physics

2006-10-17 17:34:59 · 11 answers · asked by gabi 1 in Mathematics

one of my friend argued with me that more 30seconds time diffence will be there. If we are watching some thing live telecast on telelvision that was happend 30 seconds back was the argument of my friend. I denaied it I said hardly it may be one second! who is right and what was the time duration?

2006-10-17 17:34:51 · 9 answers · asked by venkat v 1 in Engineering

2006-10-17 17:32:52 · 2 answers · asked by brianp297 2 in Mathematics

2006-10-17 17:32:03 · 12 answers · asked by Anonymous in Geography

2006-10-17 17:31:21 · 5 answers · asked by purplwsea28 1 in Other - Science

I killed one tonite... It has horrible.. please someone help... I wanna know what is it. So my guilt can go away.. pleaseee.

2006-10-17 17:31:17 · 8 answers · asked by alex.dwello 1 in Biology

Greenwich Mean Time

2006-10-17 17:28:53 · 5 answers · asked by Anonymous in Other - Science

2006-10-17 17:26:17 · 3 answers · asked by Anonymous in Engineering

2006-10-17 17:23:47 · 2 answers · asked by adoniusdesign 1 in Chemistry

2006-10-17 17:21:09 · 8 answers · asked by DARK CHOCOLATE 2 in Chemistry

2006-10-17 17:21:08 · 3 answers · asked by Anonymous in Other - Science

2006-10-17 17:19:43 · 7 answers · asked by Anonymous in Mathematics

Since astronauts are away from, our planet earth for weeks even months, and also they are in zero gravity environment at outerspace, wearing heavy suits, I am wondering how do they release their natural calls?

2006-10-17 17:19:34 · 5 answers · asked by superman 1 in Astronomy & Space

2006-10-17 17:19:32 · 5 answers · asked by Scott R 6 in Mathematics

If the earth at its equator is moving at about 1,000 miles per hour,
(25,000 miles/24 hours) and progressively slower away from the equator, how is it that clouds can keep up and move right along with (or even surpass) the speed the surface below is moving. (For example, cold fronts in North America generally move from the northwest to the southeast, and clouds can make it in just a few days. Why do they even move s.e. at all? Wouldn't the surface just "run off" and leave them, so that clouds always would move west?

2006-10-17 17:18:44 · 8 answers · asked by The Invisible Man 6 in Weather

solve for x

2006-10-17 17:13:38 · 11 answers · asked by Anonymous in Mathematics

2006-10-17 17:12:17 · 4 answers · asked by april r 1 in Mathematics

Hypothesize why the pores in the cell membrane are different sizes?

Do you think cells could survive without diffusion? Explain why or why not.

Diffusion = the movement of molecules from an area of high concentration on an area of lower concentration

2006-10-17 17:06:13 · 6 answers · asked by imnbvcx2005 1 in Biology