Chemistry

I was wonder if experienced chemists tend to think of molecules in terms of dominant and subordinate parts. For example, hydrogen seems to be almost like chemical filler in many compounds, such as when carbon forms chains or combines with other elements with hydrogen filling in the rest. Is it correct to call water "hydrogenated oxygen," or methane "hydrogenated carbon?" By thinking like this, it gives me the idea that such compounds can be understood in terms of a dominant element, e.g. oxygen or carbon. That way, it seems like you could look at natural processes involving these compounds as essentially interactions of the dominant elements. E.g. when I think of rus…

DaS Energy began development of the sealed in Co2 turbine/generator eight years ago, its earlier work is posted in Open Technology and there now seem to be many trading on the name das turbine however their work does not come within a country mile, but that is not why I write, I cannot find any information on the wattage need per second to raise contained Co2 from +30* Celsius to +100* Celisus in one second. Currently our one litre size Co2 turbine/generator outputs 720,000 watts. Its curious to know if such wattage is sufficeint to bring a heating element into play and thereby ruin the knowledge that energy out cannot be equal or greater than the energy in. Thank you…

My friend is thinking of doing a physiotherapy course but he is not sure if he should take chemistry at a further level. He is fine with doing Biology and Physics but just not sure about this one. What subjects are important to this course at GCSE and A-level?? Thank you!

Hi: Is it possible to make a covalent [non-ionic] compound consisting of xenon only? Di-Xenon? Tri-xenon? Poly-xenon? If so, what is the maximum amount of xenons present in molecule made up of covalent bonds of xenons? How many xenons is needed in a molecule to make it liquid at 70 Fahrenheit in atmospheric pressure similar to that of earth? What would be the medical/biological effects of di-xenon, tri-xenon, or poly-xenon? What colors would these xenons be? Poly-xenon is a covalent molecule consisting of more than 3 xenon atoms. Thanks a bunch, GX

I'm in year ten and I'm looking for an idea for a science project involving Chemistry that is capable of winning a sectional science fair. I'd like an interesting idea that the judges might not have seen before and it must include something that I can test. I want to do something very different and interesting, Thanks, Rachael

Hi, all. I've just signed on and since the maître d' didn't meet me at the door, I thought I'd just come straight over to the forum that interests me most and say Hi. Hi. I have a question, too. I make amateur films. I'm planning one in which a scientist has built a Time Machine, and is looking for ways to power it. He's kind of a hybrid contemporary-plus-turn-of-the-century scientist, (well, it's only a movie), and he doesn't have access to nuclear fuel of any kind. But his machine requires lots of energy to "kick-start" it. More than, say, 1.21 gigawatts. I have a scene where he adds two chemicals together trying to produce a useable fuel, and whe…

This is probably a completely elementary chemistry question, but I'm trying to figure out why molecules like O2, CO2, CO, H2O are stable. With H2, it makes since to me that the two H atoms combine to form a full outer shell, and thus resemble Helium. However, O has 8 electrons so O2 must have 16, which is 2 less than a full outer shell, so why doesn't it receive two more electrons? I understand that ionization also makes a difference and that charge-neutral molecules wouldn't have a reason to bond further but how does that work in practice? E.g. does O2 break apart into, say, one O cation and one O anion and then each receives compatible pairing partners? How do you …

Chlorine in tap or swimming pool water, I should rather say. Is this determinable by titrations? E.g. silver nitrate titrations? If not, then how is it determinable? Also, would shampoo or soap have any effects on the aforementioned chlorine? Such as cause it to form a compound or something or other. Thank you.

Consider an equilibrium [ce] A <=> B [/ce] Assuming both the forward and reverse reactions are elementary, the rates of reaction can be modeled by the differential equations: [ce] \frac{d}{dt} = p[A] - q [/ce] [ce] \frac{d[A]}{dt} = q - p[A] [/ce] Where [ce]q[/ce] is the rate constant for the forward reaction and [ce]p[/ce] is the rate constant for the reverse reaction. The general solution of this system is: [ce] = \frac{p_0-q[A]_0}{p+q}e^{-pt-qt}+q\left(\frac{[A]_0+_0}{p+q}\right) [/ce] [ce] [A] = \frac{q[A]_0-p_0}{p+q}e^{-pt-qt}+p\left(\frac{[A]_0+_0}{p+q}\right) [/ce] By taking the limit as [ce]t[/ce] goes to infinity, …

What is the name of isomerism exhibited by methyl acetate and ethyl formate. Both are esters. So not functional isomers. Do you call them metamers or something else?

I started to post this as a response to the thread about the periodic table but since I've gotten some criticism lately for assuming I know more than I do with replying to threads, I though I should post it as a separate thread to check my knowledge. Please read and respond with any corrections/critique. Atoms are basically charge-balancing systems. So a stable (charge balanced) atom may not be electrostatically prone to give away electrons, but if bombarded with energy, it can lose some electron(s) due to the fact that the energy it was bombarded with is stronger than the force holding the electrons. An element's relationship to noble gasses is a guide to its behavio…

We are doing brass plating process. After brass plating - > water rinse -> passivation(Sodium dichromate) for 15-30s -> water rinse -> drying -> baking pH:Sodiumdichromate3.5 (1% solution) 4.0 (10% solution) Since pH is acidic, we worry the hydrogen embrittlement will cause our component crack.

Hello! I'm a high school boy and redox reactions are confusing me... My lab teacher asked me to do those redox experiments and now I lost my observations paper! What a douche bag I am! How can I present it to class next Sunday :-/ So, can you guys help me? The procedure of the experiments are: Changing iron(II) to iron(III) 1. Pour 4cm3 of iron(II) sulphate, FeSO4 into a test tube 2. Add potassium manganate(VII), KMnO4 until yellow solution is obtained. i. My lab teacher said this need to be acidified, but the book didn't say so, can anyone tell me why? However, I used acidified one when doing the experiment. ii. Can you help me with the equations…

i read somewhere with vinegar and salt... but it seems unlikley and if its true.. iodized salt or un iodized slats?

I get a small e-mail newsletter, What's New, from Bob Park (U. of Maryland physicist). In his discussion of what happened at the reactors in Japan he states the following regarding the hydrogen explosion- "A hydrogen bubble is explosive only when mixed with a critical level of oxygen. During the 1979 Three-Mile Island accident, it was feared that a large hydrogen bubble in the containment dome would explode rupturing the building. It did not happen, but I have repeatedly urged that a tuft of "platinum wool" always be attached at the high points of nuclear containment buildings where hydrogen bubbles would be expected to collect. The platinum would catalyze the oxidat…

I can't find anyplace that sells aqueous based ferrofluid, everyone seems to sell the oil based which stains the container. I've seen it in numerous videos...anyone know were to get the hook-up?

I kept $2000 dollars cash in a drawer in my room. I am a teenager and so that kinda money is hard to come by. I had added 100$ to my savings minutes before invited someone to my house to work on a school project. After I went to the bathroom, he seemed in a hurry to leave. When he left, I noticed that I was broke. He very obviously stole my money. There is really nothing I can do at the point to catch him legally, and I am far from being able to kick his ass. I'm also not really good friends with him, so I can't really do anything to him. It was the perfect crime. I want this rich douchebag, to pay. The two factors working for me are that I know he loves…

Anyone know? protein.bmp

a friend of mine told me that they can now turn soda into gasoline which i guess makes some sense i know some basic hs chem so i hypothesized that that reaction might look something like this c6h12o6--------->3ch4+3CO2 is something like this possible? to convert a carbohydrate into a hydrocarbon? and could it be used as a fuel?

I am trying to understand the relationship between heat and chemical reactions. It seems like higher temperatures would be required to break stronger bonds and ionize particles that are closer to noble elements. Are substances this predictable and is it possible, for example, to make lists of molecules that break down at various temperatures; as well as ions that form? I would think that by making such lists, you could see which molecular re-configurations (is that just a fancy way of saying "chemical reaction?") were possible at specific temperatures?

Well, I currently carry pepper spray, but if I'm ever attacked again, I would like an effective way to make my attacker not only leave me alone but suffer as well. Does anyone know how I might obtain a more novel form of self defense? Ideally, I would like something that burns like pepper spray, too, but also really stinks, like those stench bombs the police use. I would also like something that instantly induces vomiting, nausea, and diarrhea, enough to keep my attacker completely forget about me and tend to himself while I make my get away. Is there any chemical concoction that might do this and not be fatal?

Also, please explain.

Sometimes people tell me they can't do any science projects because they don't have any chemicals. There are some activities that don't require any chemicals you don't already have. A great example is invisible ink. Invisible ink is any substance that you can use to write a message that is invisible until the ink is revealed. You use the ink by writing your message with it using a cotton swab, dampened finger, fountain pen, or toothpick. Let the message dry. You may want to write a normal message on the paper so that it doesn't appear to be blank and meaningless. If you write a cover message, use a ballpoint pen, pencil, or crayon, since fountain pen ink could run into yo…

So in referring to certain types of reactions as either reactions that reach chemical equilibrium or go to completion. The problem I have is that equilibrium reactions can have extremely high equilibrium constant values, like the reaction 2H2 +O2 <=> 2H2O which has a constant of something like 10^80 if I'm not wrong. So is it correct to say that all reactions are in reality equilibrium reactions, it's just that some have an extremely small concentration of reactants when the reaction reaches equilibrium?