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About apathy

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  1. in what reaction? what's the mechanism? is it a substitution (of the chloro)?
  2. 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.
  3. 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 pr
  4. structure of poly[dimethylsiloxane] Just in case anyone cared.
  5. 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.
  6. 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, ob
  7. it also makes a nice intense white flame, good for flash bulbs and the like edit: oops, bud... already said that
  8. 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 e
  9. 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
  10. woops that last post from yourdad... got in there before i hit "post"
  11. 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
  12. The Gods Themselves by Isaac Asimov had creatures of 3 sexes
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