Chemistry - January 2007

I've tested these two metals in distilled water, but no change have been observed for three days. Please explain to me why won't copper and aluminum have any effect in distilled water. I would appreciate for those who help me.

2007-01-18 15:13:51 · 3 answers · asked by Anonymous

I'm reviewing elements,compounds and mixtures and one of the prmblems in my homeowrk was"Describe a procedure to seperate a mixture of salt, finely ground pepper, and pebbles. Please peoples I need to turn this bye tommorow morning so i need your help PLZZ...! So can you write a procedure for me plz and you are guarnteed to get 10 points okay. Thanks!

2007-01-18 15:08:55 · 6 answers · asked by refreshed 2

2007-01-18 15:01:12 · 3 answers · asked by Jackie G 1

could someone explain what makes ammonia polar?

2007-01-18 14:43:22 · 6 answers · asked by Anonymous

What mass of steam at 100.°C must be mixed with 175 g of ice at its melting point, in a thermally insulated container to produce liquid water at 35°C? (g)

2007-01-18 14:42:40 · 2 answers · asked by smokefanTS20 3

2007-01-18 14:29:45 · 2 answers · asked by Onions 2

2007-01-18 14:26:32 · 2 answers · asked by Yokeen L 1

2007-01-18 14:25:45 · 5 answers · asked by Anonymous

what is the difference between an empirical formula and a molecular formula?

2007-01-18 14:20:51 · 2 answers · asked by Anonymous

describe the conditions necessary for 6.02 x 10 to the 23 power gas particles to occupy a volume of 22.4 dm3.

2007-01-18 14:19:02 · 3 answers · asked by Anonymous

1) How do you find the polarity of molecule w/ 3 different elements? ex- CCl2S

2)How is SiCl4 nonpolar? when computing the electronegativity difference, it should be, but apparently it's not...so idk why??

2007-01-18 14:18:52 · 3 answers · asked by bree 3

why is avogadro's number important?

2007-01-18 14:16:50 · 2 answers · asked by Anonymous

2007-01-18 14:16:42 · 9 answers · asked by saul_dlrs 1

how is the atomic mass of a monatomic element related to its molar mass?

2007-01-18 14:15:12 · 2 answers · asked by Anonymous

a molecular formula is the simplest wholenumber ratio of atoms in a compound.

2007-01-18 14:03:34 · 10 answers · asked by Anonymous

A)24g Mg
B)80.g Ar
C)4.0g He
D)10.g Ne

i put d but that was wrong....??? help?!?!?

2007-01-18 13:58:56 · 2 answers · asked by um yea hi 4

one mole of any gas occupies a volume of 22.4 L at STP.

2007-01-18 13:57:49 · 19 answers · asked by Anonymous

A) NH[subscript 4, superscript +]
B)N[subscript 2]
C)NaHCO[subscript 3]
D)Na

im kinda confused as to why i got this wrong on my chem test. please also give me a reason why the right answer is right

also, i put A and it was wrong

2007-01-18 13:54:56 · 2 answers · asked by um yea hi 4

2007-01-18 13:49:17 · 2 answers · asked by Anonymous

1. what is formed during a neutralization reaction?
2. what % of all compounds do orgainic compounds make up?
3. Vitiamins that do not dissolve in water are stored in what?
4. is water a orgainic compound?
5. explain how changes in ph affect the eviroment and living things?
6. how do you saftley clean up a hydrochloric acid spill?

2007-01-18 13:46:43 · 4 answers · asked by pinkpanther014 2

2007-01-18 13:30:28 · 2 answers · asked by asdfasdffdas 1

A. 40.6
B. 24.3
C. 57.3
D. 72.8

2007-01-18 13:28:05 · 1 answers · asked by Anonymous

A. 4.2 mol of carbon
B. 8.34 x 10 to the 24 power atoms of lead
C. 9500 formula units of calcium carbonate (CaCo3)
D. 12.6 g aluminum nitrate (al2(no3)3)

2007-01-18 13:24:48 · 2 answers · asked by Anonymous

hurry!

2007-01-18 13:10:09 · 10 answers · asked by Hopeless Hearts 2

thanks for answering.

2007-01-18 13:09:48 · 2 answers · asked by amber 3

does any1 know where i can find any chemistry chat rooms?

2007-01-18 13:09:23 · 2 answers · asked by shelly 3

chemistry

2007-01-18 13:02:48 · 3 answers · asked by jarnagin.m@sbcglobal.net 1

Help will be appreciated.

2007-01-18 12:55:17 · 1 answers · asked by TheKingOfKnowledge 1

How do you know whether a precipitation forms out of:
Lead (II) nitrate and potassium iodide
Explain

2007-01-18 12:55:07 · 2 answers · asked by untilyoucamealong04 3

NH3
NH4Cl
NaNH2
NaNO3

Thanks for your help.

2007-01-18 12:52:16 · 2 answers · asked by Anonymous