Chemistry - January 2007

2007-01-10 05:12:01 · 2 answers · asked by Anonymous

2007-01-10 04:36:28 · 1 answers · asked by vinceca2000 1

NaCL
NaI
CaO
AIP
MgO
MgS
LiF

2007-01-10 04:18:17 · 6 answers · asked by linifer74 1

2007-01-10 04:14:19 · 4 answers · asked by Eli K 1

2007-01-10 04:09:41 · 3 answers · asked by mackwinker 1

2007-01-10 03:44:56 · 12 answers · asked by Anonymous

Identify the following element, and justify your answer (use webelements.com for help):

It is capable of forming +3 cations, but is unable to form anions.
It has a first ionization energy of 834 kJ/mol.
It has an electron affinity of 103 kJ/mol.
It has an atomic radius larger than 130 pm.
Its oxide is capable of forming either acids or bases.

2007-01-10 03:25:03 · 2 answers · asked by collegegirl 2

I really struggled with organic chemistry last semester but i have to have it to get into grad school. i got a big ol' F in it when all i did was TRY MY HARDEST. i got an A in regular chemistry so i'm not stupid. does anyone have or know of a good online tutoring website? i've found some already but they didn't help. I also had a actual tutor but he didnt help either. are there any secrets to doing well in this class i should know about?

2007-01-10 03:22:35 · 1 answers · asked by kestrelk8 6

Ascorbic acid, (vitamin C, C6H8O6) is a water soluble vitamin. A solution containing 80.5 g of ascorbic acid dissolved in 210 g of water has a density of 1.22 g/mL at 55 degrees C. Calculate the following:

the mass percentage

the mole fraction

the molarity

the molarity of ascorbic acid in this solution

2007-01-10 03:05:30 · 3 answers · asked by bosox1989 1

A solution is made containing 25.5 g phenol (C6H5OH) in 495 g ethanol (CH3CH2OH). Calulate the following:

the mole fraction of phenol

the mass percent of phenol

the molarity of phenol

2007-01-10 03:02:30 · 1 answers · asked by bosox1989 1

Pb(ClO[sbscrpt4])[sbscrpt2] + NaI ---> PbI[sbscrpt2] + NaClO[sbscrpt4]

Step by step would be greatly appreciated since then perhaps I'll understand the concept and be able to do the rest on my own. Thank you !

2007-01-10 02:55:20 · 3 answers · asked by Anonymous

2007-01-10 02:46:20 · 4 answers · asked by ajay_yelamanchi 1

2007-01-10 02:27:11 · 2 answers · asked by elizangela r 2

Please answer A. S. A. P. because I need it for my science fair project, which is due February 1, 2007.

2007-01-10 01:52:16 · 7 answers · asked by princess49872001 1

pka1 of melanic acid=2.7, pka2=5.7
1)how many mM of melanic acid & tris are present?
2)which pka will you see to calculate the pH?
3)what is the overall pH of the soln?

Q2)wat are the advantages of using absorption at 597/466 rather than just at 595 for measuring proteins in coomassie blue/brilliant blue reagent?

Q3)The pkas of slutamic acid are approx. 2,4,10. wat is the pH of .1! soln of monododium glutamate?

Q4).1ml of stock soln is diluted with 2.4ml of distilled water. 50microlitres of this soln id diluted with .4ml of distilled water. the overall dilution is? ( can be givin in a ratio)

please can someone help me on this ASAP
thanks a tonn !

2007-01-10 01:38:56 · 2 answers · asked by phalo 1

i can't get this one can anyone help

__C10H16(OH)3 +__O2 = __CO2 +__H2O

2007-01-10 01:35:43 · 8 answers · asked by Mz.Thang 3

The Lucas reagent consists of ZnCl2 in concentrated HCl. Its reaction with alcohols goes: R-OH + HCl ---> R-Cl + H2O. Now, what will happen if we use dilute HCl instead of the concentrated one?

2007-01-10 01:33:22 · 2 answers · asked by naja 2

chemical equation of this exothermic reaction is

a) 2H2(g) + O(g) ––> 2H2O(g)
b)2H2(g) +3O(g) ––>3H2O(g)
c)2H(g) + O(g) ––> 2H2O(g)
d)2H2(g) + O2(g)––> 2H2O(g)
i am not sure about this but i think is the number a

2007-01-10 01:32:55 · 2 answers · asked by princess 1

What are the meaning of (-) and D

2007-01-10 01:32:25 · 1 answers · asked by curious 1

method to investigate how the concentration of a hydrogen peroxide solution affects the speed at which it decomposes to produce oxygen gas

2007-01-10 01:23:09 · 2 answers · asked by kaffy 2

And how could I word this in my essay?

2007-01-10 01:21:29 · 3 answers · asked by Crazzzzzy 2

could someone give me the chemical equation of it? thanks!

2007-01-10 01:18:11 · 3 answers · asked by mn3mosyne 2

2007-01-10 01:12:38 · 3 answers · asked by martin 1

2007-01-10 01:10:28 · 2 answers · asked by curious 1

Can someone balance this chemisty problem
H2O+C12H2O11----->C2H6O+CO2

2007-01-10 00:52:32 · 1 answers · asked by tru_soldier_513 1

What would happen immediately and what would happen over time?

Like say, if you dived into a pool of it.

2007-01-10 00:31:35 · 11 answers · asked by Elite117 3

i can not understand that what make someone best friend you know i think that some unusual feeling and idea is makes someone best but myself dont knoew

2007-01-10 00:30:12 · 2 answers · asked by mohsen s 1

2007-01-10 00:24:30 · 3 answers · asked by yahoouser 1

2007-01-10 00:22:49 · 8 answers · asked by Anonymous

It is said that oxygen is combustable, and one should not light a cigarrette near it, but fireman can go into a burning building with oxygen/oxygen tanks and nothing happens.

2007-01-09 23:51:52 · 6 answers · asked by St♥rmy Skye 6