Organic Chemistry

Does anybody in science forum land have any Cephalosporin C potassium salt? Sigma discontinued the product and I am in serious need of the potassium salt for enzyme assays. Thanks

I heard ages ago that plastic could conduct electricity, but only recently someone gave me a vague description of how. The Plastic chain has an alternating pattern of double and single bonds. So it goes like :- C=H, then C-H, then C=H, then C-H and so on ............. Apparently, the electrons between the double and single bond are shared. So the charge passes through. Can someone give a more detailed explanation ???

why do some molecules fluoresce and others don't?

im curios becouse im intrested in using it to remove caffine from things... as a project, im just wondering is it a common chemical to be found at a chem store>?

is it possible to distill ethanol to 100% or would it just evaporate under the heat

I have come across this problem. over the last 20 years a washing industry has been dumping its tetrachloroethane in small quantities. Recently it was discover that the tetrachloroethane haas formed a 'puddle' at the bottom of the water table below the building . There is about 10 tonnes of the stuff down a far out way. As you properly know the molecule is non-polar so that molecule doesn't dissolve in the water. We now need to remove the chemical. Does anybody have a suggestion on any way/method of flushing the chemical out and being able to collect it? HELP.

Ok everybody, I have an assignment due for chemistry really soon about the combustion of gasoline. Correct me if I’m wrong but I believe that the general formula for Gasoline is C8H18. When it reacts with O2 in a combustion reaction it produces CO2, Water, and CO. How does it produce CO? I know that water and carbon dioxide are the standard products for any combustion involving an organic molecule, so where does the CO come from. Is it because it doesn't burn all the way? Anyone with even just an inkling of knowledge on this subject, please respond. (Links are welcome as well) Thanks

Hi, I'm a writer, not a science-type person. I'm hoping someone here can help me out. I'm working on a piece of fiction that takes place in a futuristic time when fossil fuels are not available (either by depletion, lack of access or perhaps cultural taboo; I've not determined). My question is this: What other fuels, not based on petroleum, would be available to this society?

I got a glance on this question in other forums. In what state does wax as the fuel in a burning candle?

I have been studying various high-intensity artificial sweeteners and have found that a sweetener called Saccharin is the only high-intensity artificial sweetener that does not cause any proven harm to human consumers. What I don't know and have been trying to figure out is how Saccharin is manufactured. All I know is that it involves the oxidation of O-Toluenesulfonamide and I don't know what that is or where it comes from. So, if anyone could explain how saccharin is produced and whether it can be done with household chemicals, I would be very appreciative. Thanks.

Is it possibe to make a buffer with acetic acid and sodium acetate. Also wat r some other ones i cold meke

I am having trouble extracting oil from my simulated in vitro test environments. In these, are water maxtures of waters/sand/soil/gravel/oil and my test substance. Currently i am trying to extract the oil using Petroleum Ether, however the substance I am testing is reducing the the ammount of oil being stripped, also the sand/soil is blocking my separation funnel . Does anyone know another way to extract the oil? Help appreciated

Detergents has long strains of non-polar molecules and a positive end right? then what is it in detergents that produces bubbles?

what is the approximate value of H bond strength in ethanol!? thxx...

Hi, I am learning about molecualr biology and it seems as though it deals with certain molecules. Is it just chemistry with a different name and purpose or is there more to it? Thanks

I've noticed the molar mass of diethyl ether is considerably higher than that of ethyl alcohol.. yet, diethyl ether has a much lower boiling point. Why is this?

I'm in need for some methanol, I've read that this is in white spirits here in the UK but then I've read that it isn't. I know that there is 5% in mentholated spirits, I'm thinking of distilling this out using a water bath and all the rest of piping etc. Just wondering if there's a better source anywhere? I'm in the UK.

Please help me on this lab. Alka-Seltzer Lab Purpose: You work for Safeway Inc. and are testing the quality of the effervescent tablet that is sold as an alternative to Alka-seltzer. You want to make sure that the tablet delivers as much relief as possible and you can measure this by measuring the amount of bubbling. You will predict the amount of bubbling theoretically possible and compare it to the actual amount of bubbling. The reaction that occurs is: NaHCO3 + HC6H7O7 --> NaC6H7O7 + CO2 + H2O HC6H7O7 = Citric Acid Hypothesis: * Predict the amount of CO2 * Don't forget to consider which reactant is limiting…show all your calculations t…

hi, i was wondering if it would be possible (which i think it would:) to determine the amount of sugar in say 250mL of pepsi by gravimetric means? if it would could anyone tell me how could it be done? right now i have a bottle of pepsi light, caffeine free, it states 0.0g of sugar per serve(250mL), nevertheless i still want to test it

http://www.newscientist.com/channel/health/mg18524845.800 "ICY seas that get no sunshine for months on end have, paradoxically, yielded a possible treatment for skin cancer.A team led by Bill Baker of the University of South Florida in Tampa dive in Antarctic waters to collect organisms that might yield potential drug molecules. " He was one of my favorite professors at USF.

Hey guys I am hoping that someone here who has a strong organic background can help me out. Quant, phys chem, no problems ... organic on the other hand I hardly have my head above the water. Honestly I don't feel that I deserve the grades I have. In the synthesis of 1-phenylethanol, we poured acetophenone into methanol. Next, we prep a solution of methanol, sodium methoxide, and sodium borohydride (in that order). Slowly poured the borohydride solution into the acetophenone/methanol mixture. I know that NaBH4 is providing the hydride ions ... but why methanol? Maybe I need some sleep here or a refresher on the reduction of carbonyl groups but the answer isn't po…

If each molecule of acetanilide produces one molecule of hydroge bromide, what volume of HBr gas should be evolved from the reaction? So to solve this, ONE molecule of acetanlide will produce ONE molecule of hydrogen bromide... then, the molecular weight of hydrogen bromide produced will have a mass of 82 grams... Ok, am i doing this problem correctly so far? So what step do i have to go to next, i am confused on how to approach this problem, thanks

Oh how my misguided brain hurts. A friend of mine is a composer working on a special project. She tells me that there was a recent paper published tha claims that the aromas we register are not caused by the molecule but by the "frequency" that molecule is "vibrating" at. She's presently hard at work composing the "scent of geraniums". Neat stuff! She has also told me that the present theory of how we smell has something to do with the "shape of the molecule", which makes no sense to me. Do molecules come in different shapes? Looking for some interesting insights

i know that when amino acid reacts with reducing sugar under heat, some brown substances will be formed, but is there any way to test the substances!? and what exactly the temp needed for heating?! thxx

how do we know if a molecule is optically active? does it have to do something about R,S configurations? I have no idea, what it is...and how to know whether a molecule is optically active or not thanks