Chemistry - January 2007

whats a fast and affective way to clean pennies?

2007-01-12 14:53:39 · 9 answers · asked by user 1

I find this in the nutrition facts on "sugar free" gum. Does it have anything to do with artificial sweeteners?

2007-01-12 14:52:14 · 7 answers · asked by Holy Macaroni! 6

2007-01-12 13:55:23 · 6 answers · asked by kanwar pal s 1

2007-01-12 13:54:38 · 5 answers · asked by kanwar pal s 1

18 is what percent of 24
18 is what percent of 45
32 is waht percent of 24
50% of a number is 20 then 75%of the same number is
40% of 60 is equal to 60% of what number

2007-01-12 13:47:11 · 6 answers · asked by Sara 3

2007-01-12 13:09:27 · 6 answers · asked by Anonymous

Why is lead iodide a better choice for investigations of balanced chemical equations?

2007-01-12 12:18:17 · 2 answers · asked by Random G 3

Should this chemical be controlled, after all it is about 2 steps away from Methylenedioxymethamphetamine
(ecstasy) or is it people have not dicovered it yet?

2007-01-12 12:09:32 · 2 answers · asked by Anonymous

I need help with Highschool chemistry-
my teacher refuses to teach me because it was my responsibility to attend class in the first place :(
i really need to learn how to do this as i am really behind

how do i write the chemical formula for molecules?
for example:
copper(II) nitrate


and how do i name chemical formulas?
for example:
Cr(CH3COO)2

i understand that LiF would be lithium monoflouride but what i dont understand is how the number of protons and etc effect it

i hope this is clear and thanks for any help in advance

2007-01-12 11:52:59 · 1 answers · asked by iheartmusic808 1

I am working on a science fair experiment, and my teacher offered to create a solution for me. I went in, and she was too busy to help so now I am on my own. Is there a solution that I can create to resemble the acids in our stomach? I'm trying to figure out which advil dissolves the fastest.

2007-01-12 11:14:51 · 4 answers · asked by dani_es_bonita 1

Compare and Contrast the 2 states.

2007-01-12 11:10:17 · 6 answers · asked by Anonymous

2007-01-12 10:59:03 · 1 answers · asked by OOH sheahh 1

Or will it quickly soak into the carpet and not be visible? My son broke a glass thermometer and we don't know if it was a mercury thermometer or not. We can't find signs of mercury anywhere on the carpet.

2007-01-12 09:51:39 · 7 answers · asked by ChristyH 2

2007-01-12 09:49:13 · 7 answers · asked by rdeanstylist 1

it arrived in 1 gallon metal containers...

would it be be better to transfer it all to the huge water container that i have delivered?

2007-01-12 09:42:49 · 4 answers · asked by carolthec4 1

2007-01-12 09:20:09 · 2 answers · asked by Anonymous

2007-01-12 09:00:50 · 6 answers · asked by GDCBGB 3

If so, then how? What is the formula in a language that can be understood by a person who knows nothing of chemistry?

2007-01-12 08:57:04 · 7 answers · asked by Carl Ray 1

2007-01-12 08:45:42 · 6 answers · asked by some_blk 2

2007-01-12 08:43:50 · 11 answers · asked by Anonymous

2007-01-12 08:38:59 · 3 answers · asked by kilzer52 2

please give me proof of ur answer

2007-01-12 08:18:05 · 3 answers · asked by Anonymous

2007-01-12 08:01:16 · 4 answers · asked by cookboi 1

Can someone explain this experiment to me?

2007-01-12 07:50:11 · 10 answers · asked by Anonymous

Germanium is an element on the periodic table.

2007-01-12 06:58:19 · 6 answers · asked by Punk 1

2007-01-12 06:52:39 · 6 answers · asked by Jesaka M 1

2007-01-12 06:40:08 · 8 answers · asked by linifer74 1

For my science hw, I have to find the molarity of this sunbstance, here I'll show you the problem:

Determine the molarity of the following solution. Show your work to receive credit.
525 g of lead(II) nitrate, Pb(NO3)2, dissolved in 1250 mL of solution.

So heres what I got so far:

Mass = 525 g, Volume = 1250 mL x 1000 = 1250000 L
Moles of Pb(NO3)2 = mass/molar mass
Moles = 525/?

I can't seem to find the molar mass, so does anyone know?

Thanks in advance

2007-01-12 06:02:14 · 2 answers · asked by C. 2

I have a new hobby of electroplating and I need to add some sulphuric acid to copper sulphate to enable me to plate my items

2007-01-12 06:01:42 · 10 answers · asked by Bob 2

When we move a solid object, the object retains its shape, density, and volume. The mass of the object, therefore, remains a constant between state and state.
I am correct? :)

2007-01-12 05:20:47 · 2 answers · asked by princess 1