Chemistry

My understanding of chemistry is minimal, so if this idea doesn't work go easy on me. So I understand helium balloons rise in our atmosphere because they are less dense than our air. Could it be possible to create a cylindrical container having two sides light air(less dense) and the other side heavy air(more dense). The sides are separated by another cylindrical container. Inside this container theres compartments of medium dense gas. When the gas turns to the light side it fall creating a downward force, on the heavy side the gas would rise to create an upward force. The resulting force would continuously spin the inside container which could be attached to a turbine or…

Hey, so i stumbled upon an interesting bit of esterification today. After lunch (tandoori chicken wrap) i had a polomint at my desk and got back to work. After a few minutes as the mintyness was starting to disappear, BAM. banana flavour! out of nowhere! As some, or most of you will know, there are a few esters that taste just like banana and are used in banana flavouring. There is a high chance this is what happened. I'm just guessing but I think the ester formed was 3-methyl-1-butyl ethanoate otherwise known as isoamyl acetate. this is a common banana flavouring and the result on my tounge tasted very banana-y while the guy who runs the QC labs at my work i…

Hey guys, new here. I've been trying to get my hands on 1-Methyl-3-Isobutylxanthine for quite a while now. I don't need a lot of it at all, probably less than 10 grams, but it's almost impossible for me to find this stuff. The only places I've seen that have it are the big companies, Sigma Aldrich, Cayman Chem etc. that would only sell to real labs/universities. Any help with suppliers or websites that will sell to *ahem* individuals without any credentials... ? This is quite a safe drug, it's just a phosphodiesterase inhibitor. Thanks all!

A lot of people told me that you should heat the cattle bones first and then ground it in a mortar and sieve to obtain a small size. But does it matter if you ground it first or heat it first?

Hi Guys I have a protein purification question. I've been trying to purify C4 from plasma. I diaylsed it in acetate buffer and put it down a cation column. Its not purified as well as i expected. any ideas what i can do with the sample next?

where can i obtain dried and pulverized fish bone? i lived in Fresno, California. i need the fish bones to make fish bone char

Living in the 21st century people, especially office worker who is most happy thing is had enough money to buy a new apartment, but often happy thing always help with pain, for example: the house decorate this link, known to decorate bridal chamber is sure to use paint repaint the wall, but unfortunately paint contains a dangerous substance "formaldehyde", formaldehyde is a colorless, have intense stimulating odour gases. Soluble in water, alcohols and ether. Formaldehyde is a gas at room temperature, the main reason is formaldehyde is a chronic poison, for a long time at formaldehyde environment serious still can endanger the lives, that we should how to prevent or prote…

What determines the internuclear distance of a covalent compound? What i guess is that the main factor determining the internuclear distance of a covalent compound is the original distance between valence electrons and the nucleus of atoms that the compound derived from(i.e the determinating factor does not include the bond enthalpy) Am i right?

Can anyone explain why chlorophyll appears green? Does the green come from excited electrons excited by light(i.e photons with energy equal to the difference between orbitals are emitted)?

Two stove 'A' and 'B' were used by different person. 'A' produce yellow flame and 'B' produce blue flame. Which burner is needed to clean and why?

From the book,i know that X-ray is used to determine internuclear distance between atoms in a compound(or element) because wavelength of X-ray is similar to the internuclear distance between 2 atoms.But my question is that:what is the relationship between the nearness and its use to determine the internuclear distance?

what is the difference between volumetric tiration and potentiometric titration.

can someone tell about some chemistry books i want to learn everything there is about it it preferebly with experiments,components of things.

According to de broglie wavelegth = h/mv where h=plancks constant , m = rest mass of body , v =velocity of body but for a photon rest mass = 0 therefore it should have wavelength equal to infinity but it is not true light waves have certain wavelength . Can anyone explain me why it is like that ?

After 1 electron is removed from an specific atom,the successive ionization enthalpy of the specific atom will increase. But what i want to ask is that : Will the emission spectrum of it change?I have this guess because its orbital energy level seems to be changed already.

for example, food or other organic substances.

Hi, In a test in our a-level class we had to use gelatine because we didn't have proline. We used acid hydrolysis to break down the polymer, which i believe has glycine and proline in it in roughly equal measures. Then we added ninhydrin, which produced a yellowish colour. Now i know why proline doesn't produce the purple colour, but what i don't get is how come this works? Because Glycine is a primary amino and its also present in gelatine, so surely when we performed acid hydrolysis the result would be equal (roughly) amounts of proline and glycine. How come the glycine didn't react as well and turn the solution purple? Thanks for any help.

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Explain how standard solutions and titrations are done in industry? any one know?

So, in my quest to make LaTeX more useful on the forums, I stumbled upon the mhchem package. Basically, it allows you to very easily typeset chemical formuae and reactions. For example: [ce]CO2 + C -> 2CO[/ce] This looks great, and it's not complex either: to see the text I used to generate it, click on the image. Instead of using the [math] tag, we use the [ce] tag for chemical equations. Also, you can put things above the line, like so: [ce]CO2 + C ->[\text{heat}] 2CO[/ce] Here's a few more examples to whet your appetite: [ce]CO2 + C <=> 2CO[/ce] [ce]H+ + OH- <=>> H2O[/ce] [ce]SO4^2- + Ba^2+ -> BaSO4 v[/ce] If you wa…

If hygroscopic compounds can absorb water vapor from air, can they also absorb liquid water from certain material( ex. water within a wet cloth or water within some other substances)?

I'm a second year chemistry major and I love it, but I had a couple questions that I thought some people here could clear up. A lot of my friends are pharmacy majors. They are going to go to school for 6 years, get a pharm D, and then go out and make $100,000 a year. I'd be a chem major no matter what, but how much does a fresh PhD in chemistry usually make right away if they went into industry? The internet tells me $66,000, is that about right? It just seems like I'm going to have to spend more time dealing with more difficult subject matter and have to write a thesis and everything, and they will make more than me, at least initially. How long does it usually …

What would happen if you carefully put a small amount of bleach on yellow teeth? being very careful not to ingest it of course say using an artists brush. Same goes for anal bleaching aside from that hurting like hell I imagine. Alot of these pursuits of vanity are outrageously expensive and yet I believe they use the same basic product but perhaps in a stronger or weaker formula. I have also seen girls use ordinary household hydrogen peroxide to bleach their hair albeit in a few sessions because the concentration is not as strong as the hair dressers so perhaps this would be a better and safer option than household bleach for the other tasks? though I still wou…

Hi everyone! While browsing through a chemical database site I came upon an entry for nitrogen dioxide that showed the nitrogen having a positive charge: http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3609161&loc=ec_rcs Is this correct? Shouldn't this molecule actually be neutral? Have they confused it for something else? Thanks.

Hello everyone, I recently was assigned an assignment at my university to analyze the impending helium shortage crisis, and how to stave it. I thought I would come here to find an avenue for constructive criticism by a community that is geared perfectly for the sort of feedback I'd love. Below is an excerpt from my written assignment that incorporates my suggestions for staving a helium shortage. The solutions span from more practical and tangible approaches that can be executed today, to more conceptual and futuristic approaches. Any suggestions would be much appreciated. Thanks so much in advance. The helium solution will involve a multifacetedapproach that …