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Jan16-12 Greg Bernhardt
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
64 154,828
chemistry, websites Sticky Thread Pinned: Good chemistry websites ( 1 2 3 ... Last)
I think that these links can be interesting: PeriodicTable:
May7-14 10:06 PM
115 147,059
Illegal/Dangerous Activities: Explicit "how to" discussions of illegal and/or dangerous activities, or posts...
Jul31-07 05:03 PM
0 41,008
Hi, I carried out a couple of experiments with unknown group 2 salts; X and Y I added dilute NaOH to each of the...
Nov17-07 02:41 PM
4 8,855
need help fast as coursework needed to handed by this monday
Mar20-09 03:03 PM
4 8,850
Hello Everyone, I'm reviewing for my chem 12 midterm and just came accross a question that i'm not sure about. If...
Jan28-05 08:33 PM
5 8,847
I've bought some of the stuff recently mainly to replace normal household chlorine bleach. It fizzes when it's...
Mar22-11 09:04 PM
22 8,816
i am a total newbie here....i understand basic principles like supercooling, phase change, etc, but otherwise a total...
Nov1-07 01:49 PM
5 8,811
for my titration at school i need to create a sodium carbonate solution do i need to heat up the water or can i...
Mar20-08 12:36 PM
3 8,801
i cannot get this i have read through texts, and have made probably incorrect postulates of my own on the matter but...
Aug9-05 05:37 PM
7 8,793
Hi. I'm having a hard time solving this problem. I have to find the identity of element X in the following...
Nov29-04 10:09 AM
3 8,758
Hi guys, I have a quick question on this checmical, Polybutene. At my plant, we are having a pigeon problem in one of...
Nov13-08 10:19 AM
6 8,746
Okay I am lost. My Professor has given me the formula ( C4 H8 Br2) and the signals 3.8(s, 2H) and 1.8(s, 6H). How the...
Aug3-04 09:08 PM
7 8,743
Greetings ! I have a little question. My teacher was talking about stable ions some days ago, he wanted to explain...
Nov27-08 12:57 PM
13 8,707
Something has always mystified me about swimming pool care. Why is it that owners need to keep adding chlorine...
Nov26-09 02:26 PM
chem geek
7 8,706
I've been trying to find a definitive answer to this question since long, and I still haven't found one! My teacher...
Jan14-09 07:47 AM
6 8,697
Can someone help with these questions: a)Silver nitrate is added to a solution and a precipitate forms. This...
Apr7-09 03:14 AM
4 8,689
I need some help, in explaining how to know what kind of d-metal complex a molecule is. For example, I have: 1. 2+...
Dec14-09 06:31 PM
3 8,679
My teacher mentioned that if an element has a neutron to proton ratio of 1.2 or higher than the element is...
Jan23-07 06:34 PM
3 8,676
Why do acidic drugs remain unionized in acidic environement, and become ionized in basic environment? Similarly,...
Oct12-13 08:51 PM
4 8,671
Please show me the derivation for the formula relating Gibbs free energy change and the reaction quotient. I didn't...
Apr21-11 02:22 PM
11 8,665
According to my text book,inert pair effect has two definitions 1:-The occurence of oxidation state which is two...
Mar5-10 11:18 AM
Char. Limit
1 8,657
Example: Take a hydrogen atom and make it a carbon atom. Can we do it with our current technology? If so, how...
Sep6-10 02:20 AM
7 8,629
I understand that microwaves cause water in food to heat up, but I don't understand why it is only water. Why won't...
Dec27-10 12:51 PM
6 8,628
I've been looking at phase diagrams and vapour pressure tables for CO2 and i notice that the data stops at the...
Aug15-09 01:58 PM
7 8,624
I noticed on the news a thing on tooth care and one thing they said was that drinking tap water is better than bottled...
Jun17-12 06:44 PM
8 8,617
is it possible to separate oxygen from air? in other words, getting pure oxygen from air
Jun11-11 04:14 PM
14 8,594
How could someone roughly calculate flame temperature? Lets say that a chemical reaction occurs at 1000F and the...
Sep1-10 01:43 PM
4 8,580
I am going through Sn1, E1, Sn2, E2 reactions and I'm trying to figure out if the reaction involves a nucleophile...
Oct28-11 11:58 AM
7 8,577
what is the difference between oxidation number and ionic charges? I realize they are written differently, +1 vs. 1+,...
Apr11-04 01:20 PM
1 8,575
How do we name cyclohexene with E/Z configuration? This compound is symmetric w.r.t. the double bond.
Nov24-10 03:51 AM
5 8,571
A mixture of Mn2+, Mg2+, and Zn2+ was analyzed as follows: The 25.00mL sample was treated with 0.25g of NH3OHCl...
Oct21-04 10:39 AM
6 8,565
Let's say a compound having a molar absorptivity of 20000 and a concentration of 3e-5 M is kept in a container 5 cm...
Sep25-05 12:10 PM
6 8,548
How much are graphite plates? I need them to build my fuel cell.
Oct22-05 03:48 PM
4 8,548
When does dissolving occur? it would help if you put in a diagram to s I'd understand more.
Dec28-07 07:44 PM
5 8,543
I tried to use VSERP to draw the shape of H2SO4 but consider S :6 (group6) 4O :2*4 2H :1*2 ----------- ...
Jan18-05 02:22 PM
3 8,535
I have this question to do for homework and i cant find the answer anywhere so please can someone help me. Barium...
Jan11-04 03:36 AM
2 8,530
Hi there, I suppose there is a standard palette for atoms representation? i.e. white for hydrogen, red for oxygen?...
Jul31-08 12:24 AM
8 8,530
I am a newbie to organic chemistry. Can someone please outline a hydrolysis reaction of aspartame...I.E. parts of...
Aug11-04 03:49 PM
1 8,527
"Electron screening" came up in a homework assignment, and I'm not sure what it means exactly. All I've been able to...
Nov11-09 11:38 AM
3 8,526
Hello This is quite a simple question, but I am hoping someone has the time to help me with this. So, I have a...
Jul8-05 03:49 PM
1 8,524
Material is Carbon. Rectangular bar 3.409 L x .45 T x .45 H Weight: 22.94 grams I do not have access to a...
Oct29-09 03:44 PM
1 8,517
Hi, I have had some Boric acid (99.9%) bought a very long time ago... The expiry date was in 2006... I have...
Feb7-12 02:05 AM
3 8,511

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