The chemical-compounds tag has no wiki summary.
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1answer
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Can we tell from periodic table that which materials are ferromagnetic?
I want to know that because I want to see whether ferromagnetic materials relate to the number of outer most electrons. If there is no direct relationship, could you please give me a list of the ...
2
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3answers
112 views
How do the molecules of reacting compounds proceed to form “Most Stable” molecule?
This question is a cross post from chemistry. I'm not very convinced with the answer there. So, I'm posting it here.
I'm tutoring few students for Chemistry. During the course, I many times use the ...
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1answer
49 views
Action on Lard Oil
If water is mixed with lard oil and heated (creating some super-critical liquid with water), how does this affect the volatility of the mixture in comparison with its purity..?
So, My question is: ...
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0answers
74 views
Which Element is reduced in this reaction? [closed]
This question has been reposted to the Chemistry StackExchange, and closed here. If you can answer it, please head over to the Chemistry site and answer it there.
Which element is reduced in ...
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1answer
56 views
Chemistry Question [closed]
I know this is a physics site, but I hope someone can help me. How would I find the Empirical formula for Copper(II)Nitrate?
I don't even know how to find the empirical formula for Nitrate as it is ...
2
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2answers
75 views
Driving a solution of optical isomer molecules with the resonant frequency
What happens when we drive a solution of optical isomer molecules (enantiomers) with a microwave radiation in resonance with the tunneling frequency of the molecules (the frequency of the transition ...
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0answers
136 views
Gas chromatography/mass spectrometry: Can I use peak ratios and molecular mass to derive quantity? [closed]
This may be more of a chem question, but until there is a SE dedicated to chemistry, I'll rely on my philosophy that most natural sciences are applied physics and try my luck here.
So, without going ...
3
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2answers
527 views
Why is oil a poor conductor of heat?
Why is oil a poor conductor of heat? Does it help in insulation?
0
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1answer
141 views
Why does the d-spacing of a polymer decrease as its crystallinity increases?
I am currently investigating the annealing of a polymer (Parylene-C). In my reading I have found that when the polymer is annealed, there is a decrease in thickness of the film which results from a ...
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0answers
157 views
Fast-evaporating Hydrocarbon (CH) solvent [closed]
This is more a chemistry question but I am hoping somebody here can help be anyway:
I am looking for a Hydrocarbon (CH) solvent with the following characteristics:
fast evaporating
ideally ...
0
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1answer
99 views
Which bonds are the cross-links and which are secondary bonds (in elastomers)? [closed]
Elastomeres are "defined" as:
"linear-chain polymers with widely spaced cross-links attaching each molecule to its neighbours"
Now I found sentences (talking about glass transition):
"This means ...
1
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1answer
104 views
Why does separating plastic from a cough drop create flashes?
I was tearing open individually-wrapped cough drops in the dark, and noticed that when I pulled apart two adhesive-joined pieces of silvery plastic film, small flashes of light were produced. It was ...
0
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1answer
210 views
What is the name of the molecule HCCO? [closed]
I have a very hard time finding information about $HCCO$. I don't even know what it's name is.
I'd like to know what its main features are, where it shows up and/or what it's used for?
4
votes
1answer
103 views
Why does air contain $Ar$ specifically?
Air consists roughly of $N_2$, $O_2$ and $Ar$.
Why is $Ar$ the relatively common noble gas compound and not for example the lighter ones $He$ or $Ne$?
2
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1answer
114 views
THT (Tetrahydrothiophene) absorption spectrum
I am looking for the absorption spectrum of THT. What is the best way to find these types of exotic material's spectral characteristics?
0
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1answer
114 views
Circulate smoke in a closed system
Hey i am by no means a scientist but i have a idea for a art work using smoke.
Basically what i want to know is whether it is possible to circulate smoke by means of a pump through a transparent box. ...
7
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2answers
646 views
How does stuff glow in the dark?
Many things have glow in the dark properties (glow sticks, paint, toys ..), and I am wondering what is the physics behind them. How do these materials store light energy and emit it later when dark?
...
5
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2answers
56 views
Sillicon based life
My question may not be suitable here, because it's more of astrobiology. Life as we know, is carbon based.
Is it possible life based on silicon?
What will be the conditions for habitability for ...
2
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3answers
191 views
Air Regeneration in Closed Systems
I wonder what's the way to regenerate O2 in air without using consumable chemicals (where one can use electricity through electrolisis or using UV lamps)?
We can dissolve water into O2 & H2, but ...
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0answers
141 views
Why is it that when I mix tea with hot water there appear to be far less floaters on the surface than if you mix with regular temperature water? [closed]
I've got loose tea that I pour to the bottom of a glass, then apply water, stir and drink. I've noticed that when the water in the water boiler has gone cold a larger portion of the tea remains ...
1
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1answer
206 views
Auto-ionization of water
$HCl(g) + H_2O(l) -> H_3O^{+}(aq) + OH^{-}(aq)$
Assuming $HCl$ completely ionizes in water, if we prepare a $HCl$ solution, will the $[HCl]=[H_3O]$ ($HCl$ concentration = $H_3O$ concentration)? ...
4
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2answers
202 views
Why are the lighter halogens gases?
In the periodic table of the elements, only a few of the elements are gases at standard temperature and pressure. Those elements include the noble gases some of the halogens, and a few of the elements ...
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2answers
283 views
Why are the alkali and alkaline earth metals present in the ashes of burnt wood? [closed]
The alkali earth metals form the two left-most column of the periodic table of the elements, other than hydrogen. See wikipedia articles:
http://en.wikipedia.org/wiki/Alkali_metal
...
1
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1answer
168 views
Buckyballs in vacuum
I've read about the idea that buckyballs and other nanostructures could be used to hold drugs and things until they reach certain places in the body and then get released.
So I was wondering, if you ...
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5answers
425 views
Nano-particle or Molecule?
What's the difference between something being labeled a "nano-particle" or it being called a "molecule"?
8
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3answers
1k views
What determines the color of a pure substance and is it possible to predict it?
I have always wondered why salt is white, water is clear and gold is, well, gold. What determines the color of a substance? Does it have something to do with the electrons? And is it possible to ...
