rthmjohn

Have geneticists identified the alleles for the height phenotype? I've always tried to explain to my mom why I'm so short (despite my dad's relatively tall height) in terms of Mendelian genetics, but I'm sure that the height genes are much more complex. Could anybody give me an insight?

woelen... I understand basic quantum mechanics and electron configuration but I just didn't quite understand hybridization. Thanks for both of your guys' help though. I get the picture now. Does hybridization have anything to do with sigma and pi bonds?

All you really need are some nails, a dc converter (preferably a train set converter), some gator clips, and a beaker. An electrolyte such as sulfuric acid works great. If you can't get those, just use table salt (NaCl). Eventually these electrodes will corrode, so you might invest in some platinum coated wire (get it off ebay), which won't corrode at all. btw do you plan on collection the H2 and O2 gas?

I believe carbonates are weak bases in solution. This is because the carbonate ion itself has a -2 charge. When it dissociates in aqueous solution, it undergoes the following reaction: CO3(2-) + H2O --> HCO3- + OH - Carbonates are merely weak bases because most of the carbonate ions remain as carbonate and only few form bicarbonate (HCO3-) and hydroxide.

My friend gave me a brief explanation on this topic, but I still don't fully grasp the concept. I understand that it has to do with electrons switching orbitals in order for an atom to bond with another, but beyond that, I do not understand... Can someone explain?

I make them the same day i use them, and they are relatively small and are kept in a fire safe case away from flammables.

The process of forming bonds is exothermic, thus releasing energy as heat. The process of breaking bonds requires energy. The combustion of methane for example (CH4) requires energy to break each of the for C-H bonds (research bond enthalpy) but the formation of C=O and H-O bonds releases more than is required to ignite the substance. Thus, the overall reaction is exothermic.

I make mixtures or KClO3/sucrose for use in my small bang firecrackers. I calculated the enthalpy of reaction for KMnO4 + sucrose and found that it releases slightly more heat than the chlorate mixture. When i lit the permanganate firecracker however, it just went up in flames. I assumed that, due to the large particle size of both my granular permanganate and sucrose, the reaction didn't take place fast enough to burst the container. Would it be possible to stir my mixture in a very little amount of solvent so that the mixture is more intimate? Or can the dissolved permanganate oxidize the sugar in solution? Is permanganate and sucrose simply not a good bursting mixture?

just for the record, pfaltzandbauer will not sell chemicals to people without a chemist's license...

This guy on ebay claims that his aluminum powder is 99.5% pure and 1000 mesh. He's selling ONE POUND for eight dollars... Does that sound like a scam to you? Another guy is selling his supposed 3000 mesh for $35.99/lb. He claims it's the best for pyrotechnic formulas. Would I get unwanted attention from homeland security if i bought some of his stuff?

Hey, d22k. How accurate is the scale you're using? A more accurate ratio is 2.89 parts of Fe2O3 to 1 part of Al... with a good scale, you can way out more precise amounts of ingredients and thus make better mixtures of thermite.

So I'm under the assumption that when I boiled off the water in my sample of Fe2O3 containing lots of iron(III)chloride and hydroxide, my anhydrous rust still had the impurities in it?

Hey, on the topic of electrolysis, in my apparatus for making iron oxide, I used NaCl as an electrolyte. Is it possible that my apparatus produced iron(II)chloride?

hmmm, pretty sure hydrogen, oxygen, and water all have different properties...

united nuclear is very legitamate, or at least substantially... they don't give your information to homeland security, but they do a lot of government work... ironic eh?

Yup, pure fluorine gas is so corrosive that it reacts with almost anything including boro silicate glass, which means that it is impossible to store in its elemental state. Contact with the gas would give you a fourth degree burn and maybe even kill you.

(This is a completely different topic from Edwards) My friend once told me that during the Gulf war, US government issued uranium bullets to its soldiers. After the war, there was so much spent ammo in that soil in Iraq and Kuwait, that it was unsafe to inhabit, so our government just buried all of it in a layer of sand. This story sounded absurd to me, but is it even possible to make uranium bullets, and were they ever commisssioned for use in arms?

YT2095 DID NOT in any way encourage or promote the use of thermite! And besides, thermite isn't explosive... btw Where ARE the photos of your shadow on the wall? But anyway, couldn't you just use phenolphtalein to indicate when all the KOH and HNO3 is neutralized?

I've always been told that if some one touched somebody else grabbing an electric fence, the former would get the shock. If this is true, why is it so?

What do you know about supramolecular chemistry, EL?

I was thinking maybe I could use Al electrodes (I'm guessing they should be pretty pure since their from a supply co.) and file them down with a bastard file and then place the filings in a ball mill...

The reaction might work... but you'll require molten lithium and potassium nitrate and will have to conduct the experiment in a vacuum. This is only possible in a dry box (or in outer space ), and good luck getting a hold of one.

In fact it is. My mistake.

I don't know if bud is right about this particular reaction, but more negative values for reduction-half reaction potentials mean that reduction is LESS favorable.

Thanks latentheat. Aspirin, do you know if skylighter discloses personal info?