I'm looking for the value of kw, the water dissociation/ionization constant at 24C. I've found a ton of other values, but not that particular one! Could you...
Chris, Bad news and good news. First, the bad. Equilibrium, thermodynamic, and related data are most often reported at temperature intervals, perhaps just...
Mass Number, A, and atomic number, Z, are related by the number of neutrons, n,: A = Z + n The atomic number, for an atom, is the number of protons (or number...
I'm sorry; I misunderstood. I thought you had a periodic table somewhere. Maybe you have a list of the elements in the inside cover giving atomic symbols,...
Rahul, I've been sitting on this post for a few days. You asked some important questions. The message board is likely not the best way of answering them....
I am a great believer in small texts-large phys chem books can overwhelm. However the lecturer, if good, should supply an equivalent of a small text. I...
Dear Josh: As far as sites are concerned, Ian Gilmore gave you some help in message #5065. The rest of us gave information about what we knew, and we told you...
If Josh wants to be a chemist then a visit to the library might be good practice. We gave you the leads-do you want us to write up your assignment too. Get off...
There is an essay on the OpEd page of "The New York Times" of Sun., Feb. 8, by Oliver Sacks about the discovery/manufacture of elements 113 and 115 by a...
(This is a post I have already sent to some other groups). In the face of generally declining nuclear stability above Pb-208 (heaviest and most abundant...
It worried me that we had had no posts here in two days. I wondered whether any one was left (LOL). Pardon John: I should like to be educated further. Why are...
There are no stable isotopes of technetium (element 43, although its two longest-lived isotopes have half-lives of many hundreds of thousands of years,...
Would anybody know if an imine group when a substituent of a benzene ring, is it electron-donating or withdrawing with respect to benzene ring portion of...
Copied below is a recent email from Physics News. Nathan ****************************************************** PHYSICS NEWS UPDATE The American Institute of...
The imine group would be electron withdrawing in the same sense that a carbonyl group is. So C6H5-CH=NH-R is analagous to acetophenone, C6H5-C=O.CH3. The...
Steve, are you not confusing two different ideas: the inductive and mesomeric efects? Phil ... From: Steve [mailto:steve_geo1@...] Sent: 09 February 2004...
Pardon Phil, I don't think so. Talking about Lewis structures in resonance with one another, I see a two-electron bond in the cyclohexatriene ring shifting out...
Steve, I think we may be at the same pole but saluting different flags. It's been along time since I studied chemical mythology (cripes, it must be thirty ...
Hello all, I figured I'd introduce myself, and tell a bit about myself. I am currently a Community college student and have been since I was a junior in high...
Lucas, Welcome to the group. Your email introduction is excellent. Some of the chemistry topics on the group will, hopefully, be interesting to you. There...
Hi everyone! I have a lab assignment due tomorrow, and I need to answer the question below. Please help, but explain it in terms that a high schooler can...
Dear Dolphingeek, The original pink colour is due to the presence of the hexaaquacobalt(ii) ion. Addition of an alkali (or a Bronsted-Lowry base) causes the...
Hey folks, I figured I should introduce myself here. I'm Angela and a 2nd year community college student. Unfortunately, this is my second and last year in...
Of course. There is a progressive change in the coordination environment of the Co++ cation with increasing pH, causing a shift in its UV/visible absorption...
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