apathy

in what reaction? what's the mechanism? is it a substitution (of the chloro)?

GRE stands for Graduate Record Exam. It's a typical requirement for graduate programs in the US. There's a general one and various subject tests also. The general one is a breeze and the subject ones are really tough.

The chemistry GRE is hell. I took it a few years ago. It's really heavy in organic synthesis and physical chemistry. Some of the questions were really just pure physics. They have complicated analytical questions that don't have too many round numbers and they wouldn't let me use a calculator, so half the time I was taking the test, I'm sitting here doing long division. It's really light on inorganic which is my strong suit, and the pchem, like I said, was always obscure. The organic questions are ridiculous. It'll be something like, "which set of seven reagents in four steps will NOT produce the above transformation." Anyway, if you don't have to take it, just don't bother. It was humbling for me. But maybe you are a genius and are not swayed by such talk.

structure of poly[dimethylsiloxane] Just in case anyone cared.

Oh! I forgot plasmon resonance! If you have a colloid of a certain metal, usually silver or gold, you will see different colors in the solution. The color of the solution depends on the resonance of electrons on the surface (plasmons) of the metal particle. The frequency of the resonance is dependent on the size (and shape) of the particle. You can make a rainbow of different colored colloids of, say, gold. From pink to red to purple to blue, all depending on the size of the particle.

Ok, you don't need less than 10 d electrons to have color. For every molecular bonding orbital there is an antibonding orbital. If the transition to that orbital is low enough in energy to be promoted by a visible photon then you will see color. There are plenty of d10 complexes with plenty of color. You also don't need the antibonding orbital if there is an available orbital on the ligand. Or an electron can go from an orbital on the ligand to one on the metal. MLCT (metal to ligand charge transfer) and LMTC (ligand to metal charge transfer). You don't need transition metals for color, obviously, as there are many colored substances that do not contain metal. All you need is a an electronic transition in the visible region. I think there is another thread about colored smokes. He asked about p-nitroaniline, which is red and there's no metal in sight.

it also makes a nice intense white flame, good for flash bulbs and the like edit: oops, bud... already said that

actually, it's a little more complicated, this question isn't as easy as it seems First: you need to look up the latimer diagrams for standard redox potentials for both peroxide and permanganate and see what the products may be formed from the reaction (acidic or basic media differ, there will be separate latimer diagrams, but they should be in the back of your textbook) Second: a good way to do it is to write out the reaction and balance it, electrons, charges, and all here is a good step by step: http://www.science.uwaterloo.ca/~cchieh/cact/c123/balance.html balancing redox equations: anyway, write and balance the 1/2 reactions, then balance H's with protons (for acidic media), then balance the O's with waters, balance the charges with electrons then multiply the coefficients in the reactions so that the number of electrons are equal on both sides, then cancel out all the electrons, and whatever protons and waters are left, add the two half reactions and you now have your balanced redox eqn from the coefficients you can get the number of equivalents of peroxide per permanganate (lots of pers) I couldn't give you the answer because I don't know if it's in basic or acidic media, so I can't predict the products.

wow, cool from these responses I definitley understand much better now it seems that there are many factors (as to be expected) that influence intellegence and it even seems that brain size may be one of them (but not at all the major one) i never thought there may be a difference in nerve conduction among individuals maybe the people whose brain waves are "high quality" , or more efficient anyway, have a more well-constructed "schema" or something like that, that may have stemmed from early childhood development? maybe they were more mentally stimulated in the early years of childhood? that would tend to compliment the genetic side of things a little i suppose anyway, i feel much more informed about it... thanks again!

more connections makes sense to me

woops that last post from yourdad... got in there before i hit "post"

well, i didn't expect to get answers that were that good thanks a lot! it makes more sense to me now i suspected that it had a lot to do with brain size to body size ratio, since I have heard that the brains of wolves are proprotionally larger than those of domestic dogs because they have more to remember about their social order and hunting strategy, etc. while domestic dogs were thought to have originally been slightly social scavengers (at least this is what I've read in mags) this is still implying that brain size has something to do with intellegence, even if it's relative brain size about the neocortex and gyri: is there such a strong relationship between the number of gyri and intellegence? i mean if we cracked open the skull of a genius and one of a person considered "slow" could we count a difference in gyri? or is it just an average difference across species? and this is saying that the size (or relative size) of a certain part of the brain has to do with intellegence i can see that intellgence must have something to do with the presence of the neocortex, this says that the 'wiring' is important, of course then increased intellegence comes from an increase the relative size of this part? does more intellegence stem from having more neurons? bigger neurons? i'm trying not to oversimplify it, but it's tough

The Gods Themselves by Isaac Asimov had creatures of 3 sexes