Chemistry - December 2007

Am following some internet instructions to create iron-oxide. However there appears to be an error. Instructions say to attach a nail to the positive lead of a 12v power supply and submerge the nail and the negative lead into saltwater overnight.

Following the instructions to make sure you know positive from negative, I have a 12v dc power supply. I have put both leads into saltwater and the positive lead is supposed to bubble. I then am instructed to put a nail on the positive lead and overnight this will form iron-oxide. The problem is the negative lead is creating bubbles. So my question is as follows. Is the negative or the positive lead supposed to bubble? and which lead should the nail be attached to?

2007-12-29 19:38:37 · 1 answers · asked by seanb_111 1

titanium oxide and synthetic iron oxide are? my son got some of those temporay tattoos out of vending and they are listed in the ingredients list. to me they sound like they could be poisonous.

2007-12-29 17:14:45 · 2 answers · asked by Tara 7

I'm to lazy to make my own charcoal.

2007-12-29 16:08:47 · 4 answers · asked by Trident White 3

I'm trying to make hot ice for a science experiment and i cant find where to buy it please help. :)

2007-12-29 15:28:58 · 1 answers · asked by aznbluet 2

2007-12-29 14:42:39 · 4 answers · asked by mevin217 1

2007-12-29 14:37:34 · 5 answers · asked by Kary 1

I really need to know what elements react with lead and a way to measure the amount of lead in the object (i.e. lipstick, water)

2007-12-29 14:31:59 · 1 answers · asked by Alisha A 1

does anybody know?
Thanks

2007-12-29 11:49:24 · 11 answers · asked by lalalala 1

2007-12-29 11:38:19 · 5 answers · asked by acaptain2 1

What are the balanced equations for the following two reactions:
1.) copper (II) sulfate + iron --> copper + iron (II) sulfate
2.) copper (II) sulfate + iron --> copper + iron (III) sulfate

2007-12-29 11:29:16 · 4 answers · asked by Chemistry M 1

2007-12-29 11:27:10 · 3 answers · asked by Anonymous

I think it would be interesting to study the chemical reactions of the brain. What college preperation would I need to go into this field?

2007-12-29 11:19:31 · 4 answers · asked by Anonymous

PLEASE HELP ME!

2007-12-29 11:07:19 · 3 answers · asked by Anonymous

*
A) * Hg x Hg x] 2+

B)
* ** *
H x N x H
*x
H

C) *
H x H

D)

* xx x
[ H x O x H ] +

x*
H

Note: The * is used as a little circle.

2007-12-29 10:33:28 · 1 answers · asked by Anonymous

I can't decide. Is the O2 a peroxide?

2007-12-29 09:10:09 · 2 answers · asked by Anonymous

My brother has a science fair project, and Im helping him with it. I just need to know at what degrees does coke freeze?

2007-12-29 08:19:56 · 4 answers · asked by unaversallafter 1

Al(NO3)3 + NaOH (arrow thing or = sign) NaNO3 + Al(OH)3

2007-12-29 07:20:24 · 4 answers · asked by Kevinak 3

explain why a melted ionic compound is a good conductor of electric current, but a solid ionic compound is a poor conductor of electric current
dont write an essay, i just need 1 or 2 sentences

2007-12-29 07:14:07 · 3 answers · asked by Anonymous

i need a metric container that measures the SI unit for volume (cubic meter)

2007-12-29 07:13:14 · 2 answers · asked by Lorr C 1

This is a disgusting mole problem and of which I have problem solving it in a clean manner.

Question 10:

Mercury has density of 13.6 g/mL. What is the volume of 1 atom of Mercury?

In order to get the point solve this using neat and tidy steps like moles cancel out with moles etc.. type of equation so I can learn. Thankyou.

2007-12-29 07:06:47 · 5 answers · asked by Ge1st 1

Could anyone please balance this equation:
Mg+_HNO3 = Mg(NO3)2+_H20+2NO2
It would be nice if you could include an explanation too.

2007-12-29 06:48:38 · 7 answers · asked by Anonymous

name the following molecules
CI2 (that is an i, not an L)
BH3

also, how much energy is needed to break apart a molecule of acetone?
please show your work so i can figure out the rest of these problems.

thank you!

2007-12-29 06:39:04 · 1 answers · asked by Anonymous

2007-12-29 06:30:55 · 6 answers · asked by Bluebeard 1

1. A double covalent bond consists of
a. two shared electrons
b. one atom contributing two electrons into the bonding region
c. two atoms of the same element bonded together
d. two pairs of shared electrons

2. Water molecules have a bent shape rather than a linear shape because
a. water does not obey VSEPR theory
the hydrogen atoms are attracted to one another
c. lone pairs of electrons around the oxygen atom exert a repulsive force on the bonding electron pairs
d. oxygen does not have enough valence electrons to form linear molecules

3. The polarity of a molecule is a direct result of all of the following EXCEPT
a. the electronegativity of the atoms in the molecule
b. the number of multiple bonds in the molecule
c. the presence of polar bonds
d. the shape of the molecule

please help if you can!

2007-12-29 06:22:15 · 2 answers · asked by Anonymous

2007-12-29 05:56:34 · 30 answers · asked by tweety 1

also if someone gets their Ph.D in chemistry.

2007-12-29 04:20:11 · 4 answers · asked by ryanbhagratti 1

don´t you happen to know or don´t you know any net link where it is explained what is the principle of desinfecting ability of KMnO4?

2007-12-29 04:10:56 · 3 answers · asked by Anonymous

2007-12-29 03:47:22 · 7 answers · asked by kv 2

Does it dissociate, ionize, decompose, etc. into its corresponding ions? Also what occurs when potassium dichromate is added to water to form an aqueous solution?

2007-12-29 03:35:32 · 4 answers · asked by bam4ever13 1

If conductivity and ph decrease or increase in BF water what will happened.

2007-12-29 02:57:07 · 2 answers · asked by nair s 1