Chemistry - October 2006

2006-10-01 11:25:37 · 3 answers · asked by sana_ahmad75 1

2006-10-01 11:09:49 · 6 answers · asked by Anonymous

how does hyrate differ from an anhydrate

2006-10-01 11:05:14 · 1 answers · asked by Anonymous

2006-10-01 10:51:33 · 8 answers · asked by Anonymous

I had to do a chemical reaction. Took Iron Wire and placed it in a solution of copper(II) sulfate. Now I have to write an equation. Is the Iron wire Fe (s)? Can anyone show me what this equation might look like.

2006-10-01 10:48:06 · 1 answers · asked by Anonymous

help

2006-10-01 10:32:36 · 5 answers · asked by Anonymous

I know how to work out the emperical formulae, but how do I get the exact amount of atoms for each element (molecular formulae)

Thanks

2006-10-01 10:32:10 · 4 answers · asked by mark_gg_daniels 4

2006-10-01 10:21:51 · 6 answers · asked by Mia16 3

2006-10-01 10:09:49 · 16 answers · asked by MANJIT BAGGA 1

I'm converting my black and white negatives to digital at the moment and there is a yellow residue left on some of them from when i didn'r rinse them properly many years ago.

How do I get rid of them?

2006-10-01 10:07:54 · 1 answers · asked by tuthutop 2

2006-10-01 10:05:57 · 1 answers · asked by Anonymous

Is there like a department store or somewhere close and convenient for me to get this ingredient?

2006-10-01 09:52:07 · 5 answers · asked by alxthegreat8 2

if someone can help me out i'd be forever grateful

some of these have subscripts such as 02 (the 2 is a subscript) and N2 (the 2 is a subscript) and H20 and Mg(OH)2

1.) 2Mg (s) + O2 (g) ---> 2 __________ (s)
(magnesium) (oxygen)

2) 3 Mg (s) + N2 (g) ----> __________ (s)
(magnesium) (nitrogen)

3) __________ (s) + 6 H20 (I) ----> 3 Mg(OH)2 (s) + 2 NH3 (g)
(magnesium nitride) (water) (magnesium hydroxide) (ammonia)

4) Mg(OH)2 (s) ------> __________ (s) + H20 (g)
(magnesium hydroxide)


5) What could cause the experimental weight of oxygen to be (a) lower than expected? and (b) higher than expected? (no same answer for both)

6) Suppose the magnesium used in an experiment had a thin oxide coating. How would this affect moles of oxygen per mole of magnesium?

Thank you SO much.

2006-10-01 09:47:44 · 3 answers · asked by Anonymous

please help me, science lesson I missed and I'm expected to know this

2006-10-01 09:37:46 · 12 answers · asked by lumwoz 2

2006-10-01 09:12:00 · 1 answers · asked by gdheon1 2

2006-10-01 09:11:40 · 3 answers · asked by Ana P 1

2006-10-01 08:49:22 · 5 answers · asked by Anonymous

2006-10-01 08:41:01 · 1 answers · asked by Anonymous

A white powder, consisting of a simple mixture of tartaric acid (C4H6O6) and citric acid (C6H8O7) was analysed to determine the elemental composition. Combustion of a 433.7-mg sample produced 533.6 mg of CO2 and 158.0 mg of H2O.

Then I have to find the %C, H, O, etc. by mass. Can someone please explain this to me? Its my last question and I cant get it :(

2006-10-01 08:24:22 · 2 answers · asked by smarty21 3

Jewel stores always have an ample supply and gold can never be used up or go away.

2006-10-01 08:23:46 · 5 answers · asked by liberty11235 6

condensation reaction between the amino end of one amino acid and the carboxyl of another amino acid?

2006-10-01 08:22:53 · 1 answers · asked by kp 1

2006-10-01 08:19:01 · 3 answers · asked by Jeremy P 1

2006-10-01 08:10:33 · 1 answers · asked by nadrafrom 1

I know that the element form at the electrode it is oppositely attracted to. But I dont know which is negative and which is positive. Help me out?

2006-10-01 07:58:36 · 2 answers · asked by angeliquexelo 1

2006-10-01 07:53:51 · 4 answers · asked by jacky b 1

2006-10-01 07:52:28 · 3 answers · asked by Anonymous

where can i buy a styrofoam ball?
i need it for chem project (atom model) due tuesday.

anywhere stores near in queens (new york) area also.

NO INTERNET SITES, LOCATIONS!!**

2006-10-01 07:45:06 · 11 answers · asked by Anonymous

is it dehydration synthesis or hydrolysis?

2006-10-01 07:40:52 · 3 answers · asked by Rubduc 1

a condensation reaction between the amino end of one amino acid and the carboxyl of another amino acid?

2006-10-01 07:40:35 · 3 answers · asked by kira 2

like carbon, graphite is made out of it and pencils are made out of graphite now so its used in everyday life

2006-10-01 07:36:53 · 15 answers · asked by Pisces 2