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Jan16-12 Greg Bernhardt
chemistry, websites Sticky Thread Pinned: Good chemistry websites ( 1 2 3 ... Last)
I think that these links can be interesting: PeriodicTable: http://www.webelements.com/...
May7-14 10:06 PM
Awheezi
115 145,591
chemical, latex, typeset Sticky Thread Pinned: Chemical LaTeX typeset ( 1 2 3 ... Last)
Physicsforums now has a very cool feature, which enables complex typesetting for formulas or equations! A tutorial...
Jul7-13 04:53 PM
jackmell
64 153,632
Illegal/Dangerous Activities: Explicit "how to" discussions of illegal and/or dangerous activities, or posts...
Jul31-07 05:03 PM
chemisttree
0 40,732
In the diagram attached, the 3 resonance structures of arenium ion bonded to H electrophile are shown.I labelled the...
Apr12-12 09:17 AM
tasnim rahman
5 1,616
Any ideas? Thanks so much!!
Apr12-12 06:10 AM
MrSid
3 1,248
is solid carbon dioxide(dry ice) soluble in water
Apr12-12 05:55 AM
MrSid
3 1,637
I know that the sigma 2p bonding orbital could be less/higher in energy than the pi 2p bonding (based on if it is...
Apr12-12 03:35 AM
DrDu
1 1,480
Ethanol has a higher ΔHvap than water (43.5 vs 41.3 kJ/mol). But water has a higher boiling point (373 vs 352K). How...
Apr12-12 03:04 AM
DrDu
4 3,767
Hi, I have some problems, 1. How to use basis sets in turbomole that not default (def-SVP)? 2. How to use scripts...
Apr11-12 10:51 PM
zainswar
0 933
Okay, I'm reviewing how to write reactions to determine which reactant should behave as the acid and which should...
Apr11-12 09:07 AM
d.tran103
4 1,136
I was wondering if anyone could recommend a good simulator to play around with. I'm a chem student and have always...
Apr11-12 04:31 AM
maxbur
1 1,229
I am studying for the MCAT and I am having a hard time understanding the rationale for the following question from my...
Apr11-12 02:22 AM
Borek
2 1,197
Does anyone know of a reference to a list of all known chemicals that freeze at less than 50 K? I know lots of organic...
Apr10-12 04:29 PM
Bob S
3 1,758
Hi, So I have this dental retainer that I was given after my braces came off. It has a pink flesh-like part that...
Apr9-12 12:01 PM
Dadface
1 1,040
What are the dissociation constants of NaCl and KCl respectively? I want to determine how much of the salt dissociates...
Apr8-12 04:11 PM
MichaelN1
3 9,342
I was attempting this question where I had to say which, out of graphite, diamond and sodium chloride represent a...
Apr8-12 02:22 PM
aroc91
3 1,890
I am wondering if I can separate these two compounds: Y: M.P.=170 degrees C - Vapor pressure at its MP = 0.05 torr...
Apr7-12 01:27 PM
chemisttree
1 1,225
I was wondering why food makers add these ingredients into the food they make:pentanatrium triphosphate, blue vitriol,...
Apr7-12 12:51 PM
chemisttree
3 1,684
I am wondering if this would work: I need to sublimate compound 1 (mp 175-177 C) from compound 2 (206-208 C) at 120...
Apr5-12 07:39 PM
gravenewworld
1 1,226
Hello, I will be experimenting with hydrogen peroxide from 5-60% concentrations and small amounts of alkaline metals...
Apr5-12 01:14 PM
Borek
3 1,299
Need urgent help with a manufacturing problem. Our company built a product that is testing in spec for propionic...
Apr5-12 02:07 AM
Borek
1 1,159
It is atmosphere rich in ions? Does Ions last long in the atmosphere or not because it is unstable?
Apr4-12 08:16 PM
wilsonb
0 1,195
In a Solid state 3D close packed structures in crystalline solids. How is this counting done? Let the number of...
Apr4-12 01:53 PM
rajeshmarndi
0 1,235
How do sacrificial metals protect the less reactive metal that it protects? Some people say that it provides the iron...
Apr3-12 10:59 AM
Borek
13 3,587
Just wondering - What factor decides whether a solid takes up a crystalline structure or an amorphous structure? And...
Apr3-12 06:54 AM
M Quack
5 1,378
is it true that the ionic mobility increases with the decrease of the ionic size?
Apr3-12 01:49 AM
Borek
1 1,454
I was reading my textbook and was confused on the terminology, is an orbit each of those boxes that you fill up with...
Apr2-12 04:35 PM
Woopydalan
12 1,789
My friend took an hormone called tren-350. Took it for about two weeks. (link deleted) This was about a month and a...
Apr2-12 02:24 AM
Borek
1 1,151
Sorry guys I am not an expert, but I wondered for my general use What substances do you know will burn in mild...
Apr1-12 03:07 PM
dudi
5 1,543
Can someone tell me how to name BINAP R or S? IT has NO chiral centres and I haven't got a clue of how to name...
Apr1-12 01:40 PM
chemisttree
3 1,487
used in medical imaging.. how did they ever find out which radiotracers would be good for what?
Apr1-12 02:51 AM
Borek
1 1,309
Hi there, There are many videos that show people converting plastic into oil, then refining the oil into diesel,...
Apr1-12 12:04 AM
SR714ever
0 1,693
I'm wondering if it is possible to make metallic hydrogen. Metallic hydrogen would be a good thing to have because...
Mar31-12 05:08 PM
epenguin
5 1,916
Hi, this is my first post. I'm generally more of a blog/message board reader than a contributor, but there's really...
Mar31-12 03:41 PM
bourbon bait
0 1,143
PLEASE, BEFORE ANSWERING I would like you to hear me out. >>> Im really confused as to the phenomenon of why...
Mar30-12 08:07 PM
Redbelly98
2 1,549
Hi I have done some research into changing the pH of an acid and I have gotten mixed answers I have Nitric Acid...
Mar29-12 04:20 PM
chemisttree
2 1,783
Hey guys, I'm an engineering PhD student, and I'm doing some work with laser-induced fluorescence. At the moment, I'm...
Mar29-12 12:02 PM
Zernhelt
2 1,364
Why is conc H2SO4 , KOH and phosphorus pentoxide dehydrating agents? I dont understand how they work. Do they adsorb...
Mar29-12 04:08 AM
morrobay
10 3,600
Hi, I'm doing a spectroscopy assignment and am analysing the NMR for p-Toluic acid. However, I need to understand the...
Mar28-12 01:27 PM
Borek
3 1,569
How does salt analysis work? How did they divide cations into these 6 groups? I'm confused over things like:- In a...
Mar28-12 02:37 AM
Borek
1 1,188
What is the purpose of creating a 4-coordinate complex with the Grignard reagent and solvent? I'm writing a lab...
Mar27-12 09:58 PM
Dro
0 887
Is the process of rotting food or any organic material directly related to the half life of its components?
Mar27-12 07:19 AM
surajt88
10 2,185
In reality pressure of a gas is lower than what is expected and volume is larger than expected - as ideal gas equation...
Mar26-12 11:06 AM
jd12345
0 1,147

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