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PhysicsForums molar absorbtivity database??  
11:36 25-Apr-07   [Replies: 1, Views: 73]    By: Unnamed
Hi I'm just looking for the molar absorbtivity for potassium permanganate at 410nm wrt Beer Lambert Law, i cant find a database anywhere. Any help would be greatly appreciated Thanks Laura...
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PhysicsForums powder puzzle  
21:57 24-Apr-07   [Replies: 13, Views: 550]    By: Unnamed
I found a powder in my driveway earlier today. I have no idea where it could have come from but I'm curious because it seems so out of place. It's very dark brown, almost, but not quite black (see ...
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PhysicsForums oxidation #'s in [Re2Cl9]2-  
20:58 24-Apr-07   [Replies: 8, Views: 141]    By: Unnamed
Sorry about no latex, when I try using latex my formulas just wind up as a link that says "LaTeX graphic is being generated. Reload this page in a moment." Anyway, I was trying to bala...
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PhysicsForums What is so special about benzaldehyde?  
20:56 24-Apr-07   [Replies: 8, Views: 227]    By: Unnamed
Someone asked me this today and I didnt know what to tell them other than the carbonyl group is stabelized really well with the benzene ring. Anything else really special about it?...
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PhysicsForums Frontier Orbital Theory  
12:58 24-Apr-07   [Replies: 2, Views: 102]    By: Unnamed
While studying the structure of 1,3 butadiene and considering frontier orbital theory, I came across a graph of the HOMO to LUMO orbitals. orbitals_4p.png [http://www.physicsforums.com/attachment....
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PhysicsForums why the bond angle of water is 105 instead of 109?  
12:41 24-Apr-07   [Replies: 5, Views: 292]    By: Unnamed
Answer please....
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PhysicsForums Very Simple Question.  
05:46 24-Apr-07   [Replies: 5, Views: 142]    By: Unnamed
Name the element which reacts most violently with Chlorine. My answer: Francium Please tell me if I am right or wrong? Thanks a lot in advance! ...
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PhysicsForums Chemistry Final  
23:15 23-Apr-07   [Replies: 1, Views: 16]    By: Unnamed
Hey Chem geniuses! I am a struggling high school chem student who couldn't combine water with water without blowing something up so some help would definitley be appreciated. My chem final has b...
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PhysicsForums Ribose and Deoxyribose  
21:28 23-Apr-07   [Replies: 2, Views: 77]    By: Unnamed
Here is a drawing of Ribose and 2-deoxyribose. My question is this the most common form of deoxyribose? Is it common to find 3 or 4 deoxyrybose? My guess is that this is the most common because o...
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PhysicsForums help Hess’s law  
21:04 23-Apr-07   [Replies: 0, Views: 6]    By: Unnamed
what steps should I follow in order to hess questions like one like this one: Predict the heat of reaction when hydrochloric acid reacts with ammonia to form ammonium chloride. I am not really s...
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PhysicsForums Chenistry help  
18:55 23-Apr-07   [Replies: 3, Views: 87]    By: Unnamed
I an a older student that would like to go back to college. I want to teach myself basic chemistry before i go back. Could anybody recommend a book, tutoring software, or website that can help accompl...
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PhysicsForums Atmosphere, Pressure, & Weather  
16:48 22-Apr-07   [Replies: 1, Views: 72]    By: Unnamed
A balloon can be filled with 5.0 L of "He" w/o bursting. The balloon is filled 0.5 L at a pressure of 1 atm. The balloon rises and the pressure gets lower. At what pressure will the balloon ...
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PhysicsForums Pottasium permanganate thickener  
03:30 22-Apr-07   [Replies: 0, Views: 62]    By: Unnamed
I am desperate for a solution to a work problem. I work with denim and i use a lot of pottasium permanganate in solution. I would like to take concentrated permanganate and make a wax block as in a ...
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PhysicsForums hard emperical formula question for assignment  
03:21 22-Apr-07   [Replies: 7, Views: 89]    By: Unnamed
Hi all, I'm quite new to posting; just been reading around the forums when I came upon this question for my assignment. I'm really quite stuck and no idea how to relate the different values (such as n...
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PhysicsForums methane to methanol / a direct pathway ?  
15:13 21-Apr-07   [Replies: 1, Views: 115]    By: Unnamed
Dear all ! Does anyone have experience with direct methane conversion to methanol ? I am trying to explore a new pathway avoiding the syn gas step. One can basically think of two approaches: a) ...
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PhysicsForums What are those bubbles in my beer?  
02:15 21-Apr-07   [Replies: 4, Views: 197]    By: Unnamed
I heard alcohol evaporates, also the carbon dioxcide pop does the samething, am I loseing alcohol percentage when I let my beer stand?...
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PhysicsForums The auto-ionization of H2O equilibrium  
23:00 19-Apr-07   [Replies: 4, Views: 163]    By: Unnamed
I'm trying to conceptually understand a question that I was wondering about while reading about Acid and Base Equilibria. Since a strong acid such as HCl completely reacts to give Cl- and the hydr...
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PhysicsForums Can someone help me to find the general trend or functional group name..  
21:23 19-Apr-07   [Replies: 0, Views: 15]    By: Unnamed
I need to study all of these names for my orgo II exam next week. Can someone help me to find the general trend or functional group name for the following attached compounds? I have tried some of th...
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PhysicsForums Help ASAP please! finding pH and pKb  
20:24 19-Apr-07   [Replies: 3, Views: 28]    By: Unnamed
HELP! I just need the steps to figured out these 3 problem. I have the answes but I can't seem to figure out how to do it and my notes aren't helping. thanks! Determine the pH of a solution obtai...
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The Science Thinkery Irritation in the Lab  
18:17 19-Apr-07   [Replies: 2, Views: 424]    By: Unnamed
Today in chemistry, we did a lab that had to do with controlling the amount of time it takes for the reaction to fully occur (I'm sure there is a specialer name; I chose to forget it). And my teacher...
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PhysicsForums Water Solubility  
16:37 19-Apr-07   [Replies: 1, Views: 17]    By: Unnamed
This is a question I got confused on while helping my son with his homework. I thought you guys might know: Which of the following is NOT a reason why water is a good solvent: A] it is a polar molec...
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PhysicsForums stoichiometry & BCA table  
22:49 17-Apr-07   [Replies: 1, Views: 94]    By: Unnamed
is anyone familiar with the BCA (Before, Change, After) table? if so i need someone to help explain the steps to solving an equation when you are only given the number of moles for one reactant...
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PhysicsForums how to prepare the mixture of inorganic material  
03:44 17-Apr-07   [Replies: 1, Views: 143]    By: Unnamed
i had a question where i wanna mix three diferent inorganic material which are tungstosilicic acid, aluminium oxide and silica oxide.. Can i mixed the three inorganic material without pre-treatment? ...
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PhysicsForums how we determine conductivity of powder??  
01:48 17-Apr-07   [Replies: 1, Views: 77]    By: Unnamed
hmm.....i got a question.. i had three inorganic polymer (powder/solid form) and i wanna mixed it according to various composition. how can i determine the conductivity? do i need special equip...
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PhysicsForums potash  
22:33 16-Apr-07   [Replies: 9, Views: 352]    By: Unnamed
what would be the end products be if i reacted vinegar(C2H4O2) with potash(K2CO3) and a gas was given off?...
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