Chemistry - January 2007

Okay, yes the wax melts, but it gets smaller too. So, does it evaporate? Just wondering.........

2007-01-11 08:44:58 · 32 answers · asked by candispassion.com 3

Explain the relationship between matter, atoms, and elements.

2007-01-11 08:30:11 · 6 answers · asked by Hannah P 1

2007-01-11 08:26:56 · 13 answers · asked by applesauce 2

Does anyone know the commercial value of mercury? Like how much is it worth. Any other info about mercury would help I'll give a best answer to the person who gives the most including the value that's ten points!

2007-01-11 08:07:17 · 3 answers · asked by Malek 3

2007-01-11 08:04:49 · 12 answers · asked by Anonymous

Some quick chemistry questions

Is it possible to get a neutral solution by mixing these 2 solutions:
one with pH1 and the other with pH4
one with pH4 and the other with pH8

2007-01-11 07:51:42 · 8 answers · asked by Anonymous

now you got me thinking!

2007-01-11 07:48:20 · 5 answers · asked by doorseeker 1

what do i need to do to solve this question


The laser in a compact disc player uses light with a wavelength of 720 nm. Calculate the energy of this radiation in joules per photon.
_____ J/photon
Calculate the energy of this radiation in kilojoules per mole of photons
.______ kJ/mol

2007-01-11 07:40:11 · 2 answers · asked by Krazyk78 1

2007-01-11 07:30:05 · 11 answers · asked by juno 4

Help is appreciated.

2007-01-11 07:15:07 · 3 answers · asked by Random G 3

In October I was in Portugal, where the water is hard i think and my facecloth (which was origionally beige) started to turn orange, how did this happen?

2007-01-11 05:58:44 · 6 answers · asked by James D 2

2007-01-11 05:52:41 · 5 answers · asked by angelsweetiemoongirl 3

Whenever quantities of two or more reactants are given in a stoichiometric problem, you must identify the moles. This is the reagent that is completely _____ in the reaction.

( Fill in the blank. )

2007-01-11 05:33:57 · 3 answers · asked by Anonymous

a.H2O ----> H2 + O2

b. NaCl + H2O

c. Fe + S ----> FeS

d. CaCo3

e. 3P4 + 10 KClO3 ----> 10 KCl + 6P2O5

f. H2SO4 + Al ----> Al2(SO4)3 + 3H2

I have been trying to solve them for homework, but I just can't get them right. Can someone explain how to solve these for me?

Thanks in advance!

2007-01-11 05:26:30 · 6 answers · asked by C. 2

Calculate the number of moles of solute present in each of the following solutions:

245 mL of 1.50 M HNO3 (aq)

50.0 mg of an aqueous solution that is 1.25 m NaCl

75.0 g of an aqueous solution that is 1.50% sucrose (C12H22O11) by mass

2007-01-11 04:54:27 · 2 answers · asked by bosox1989 1

EDTA makes octahydral complexes with transitional metalls

2007-01-11 04:39:08 · 1 answers · asked by faisal m 1

I'm taking a class on secondary metabolism (i.e. Acetate pathway, shikimate pathway...), this is forth year undergraduate course. I need a good idea for a 15 min presentation, a topic which is interesting but not necessarily one that everyone else would pick. Any suggestions. Something specific and not too broad a topic.

2007-01-11 04:34:42 · 1 answers · asked by Hard Rocker 3

2007-01-11 04:32:34 · 3 answers · asked by Anonymous

2007-01-11 04:10:50 · 1 answers · asked by mason01 1

2007-01-11 04:01:22 · 3 answers · asked by Anonymous

2007-01-11 03:59:56 · 8 answers · asked by Anonymous

What is the heat of Ionisation of formic acid?

2007-01-11 03:44:22 · 4 answers · asked by Anonymous

Can anyone please help me with this equation? NH4OH + H2SO4 = NH4SO3 + H2O. Thank you!

2007-01-11 03:14:54 · 3 answers · asked by Gapple 2

2007-01-11 02:39:48 · 3 answers · asked by sugosh 1

have 100ml water ,spoon borax then mix it take 2cm glue in diffrent small plastic cup then put on spoon of water and borax in glue then roll it

2007-01-11 02:38:06 · 1 answers · asked by sunny p 1

2007-01-11 02:04:32 · 1 answers · asked by Aleksandra S 1

The solubility of MnSO4 H2O in water at 20 degrees C is 70g per 100mL of water.

Given a solution of MnSO4 H2O of unknown concentration, what experiment could you perform to determine whether the new solution is saturated, supersaturated, or unsaturated?

2007-01-11 02:02:12 · 3 answers · asked by bosox1989 1

2007-01-11 02:00:08 · 2 answers · asked by j3dvincent 2

i work in a aromatic co. i want to know more about aromatics, GC and aromatic plates

2007-01-11 01:50:18 · 2 answers · asked by hassan h 1

its about 96 all.

2007-01-11 01:03:42 · 2 answers · asked by jenny mae m 1