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U smart? do this chemistry problem (pg. 5)
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| starglider |
| quote: | Originally posted by NeoPhono
You are correct, although I believe anisole is a common name and not technically the "correct" way to name methyoxybenzene. So technicially (IUPAC speaking) it's 4-isopropyl-1-methoxybenzene, but I'd probably give you full credit, since anisole is methoxybenzene. |
Fair enough, although you're much more likely to see anisole in the literature than you are methoxybenzene. 4-isopropyl-1-methoxybenzene would indeed be the proper IUPAC name (it could also be named as an ether of course, although that would be a common name as well).
NMR problems are fun, got any others handy? ;) |
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| trancepixie17 |
[QUOTE]Originally posted by Heinz
hmm.. howa bout no.
**ha, ha! funny! You know whiskers, heinz is mad because I'm smarter than him. Yes. Also, heinz, it's not good to skip school!:whip: :haha: |
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| butterfly |
| being able to memorize spectrums, IMO, has nothing to do with intelligence, only how well you can memorize . eh... then again, the same is true for being able to apply the gas law... |
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| trancepixie17 |
I was just kidding because heinz is a grade up and he's smarter, but I rule in English!:happy2: Btw...mr. brown is stupid. lol. gum on the ceiling...ha:haha:
* I get to disect a frog!!!!!!:D I'm so happy.....we're fighting over who gets to skin...me and my friends atavia and chong because we all want to skin it. major coolness...byez |
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| starglider |
| quote: | Originally posted by butterfly
being able to memorize spectrums, IMO, has nothing to do with intelligence, only how well you can memorize . eh... then again, the same is true for being able to apply the gas law... |
Memorize spectrums? :eek:
There's an awful proposition if I ever heard one. Identifying structures based on NMR data is a very systematic process. And while I hardly think interpreting such data is proof of great intelligence, it does require a certain amount of logical reasoning to be able to piece together a reasonable structure, especially with more complex molecules. |
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| Noisician |
| quote: | Originally posted by Mebot
You said it was like only 3 problems and you figured out the last one a week later or something..
What were those math problems like? |
i said i did 3. there were 6 of them in total.
1. let t = {(x,y): x∈[0,1], y∈[0,1]} and s = {(u,v): u+v≤π/2}. prove that
∫∫sdudv = ∫∫t(1-x²y²)¯¹dxdy.
use the above equality to show that
ζ(2)=π²/6, where ζ denotes the real valued riemann zeta-function.
2. find all functions g: R→R such that g(m-g(n))=g(g(n))+mg(n)+g(m)-1, ∀m,n∈R.
3. if n is a natural number and η(n) denotes the number of distinct ways n can be represented as a sum of powers of 2 with natural exponents, prove that
2^(n²/4) < η(2^n) < 2^(n²/2), ∀n≥3.
4. let z be a point in the complex plane that moves along the circle |z|=1. the movement occurs at intervals t=0,1,2,3...n... by angle 2π/3 with probability p, and by angle -2π/3 with probability q. determine the mathematical expectation for z if at t=0 z=1.
5. let «b» denote the difference between b and its closest integer (for example, «.6» = .4). prove that
∏[i=o to n] |b-i| ≥ «b»*n!/(2^n).
6. given a sphere of radius r, find the locus of points through which it is possible to draw three tangent lines to the sphere that form a trihedral angle with three right faces.. |
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| Azz3D |
| quote: | Originally posted by Iyrlk
The question was a high school chemistry question too. No one teaches complicated thermodynamics in first year of chemistry. |
I took chemistry in 5th grade in my country. In USA I took it in 11th. nuff said |
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| nchs09 |
| quote: | Originally posted by Azz3D
I took chemistry in 5th grade in my country. In USA I took it in 11th. nuff said |
i have a bigger penis than you, enough said!:rolleyes: |
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| NeoPhono |
http://www.chem.ucla.edu/~webspectra/
If you like solving NMR spectra, I suggest this site. It is excellent as it allows you to zoom in on peaks, allowing a clear view of splits. It also lets you work from easy to hard, as your ability increases. Some of the most difficult ones are pretty tough. |
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| Mako |
| mmmm NMR. Thanks for the link. :D |
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| Mebot |
| quote: | Originally posted by Noisician
i said i did 3. there were 6 of them in total.
1. let t = {(x,y): x∈[0,1], y∈[0,1]} and s = {(u,v): u+v≤π/2}. prove that
∫∫sdudv = ∫∫t(1-x²y²)¯¹dxdy.
use the above equality to show that
ζ(2)=π²/6, where ζ denotes the real valued riemann zeta-function.
2. find all functions g: R→R such that g(m-g(n))=g(g(n))+mg(n)+g(m)-1, ∀m,n∈R.
3. if n is a natural number and η(n) denotes the number of distinct ways n can be represented as a sum of powers of 2 with natural exponents, prove that
2^(n²/4) < η(2^n) < 2^(n²/2), ∀n≥3.
4. let z be a point in the complex plane that moves along the circle |z|=1. the movement occurs at intervals t=0,1,2,3...n... by angle 2π/3 with probability p, and by angle -2π/3 with probability q. determine the mathematical expectation for z if at t=0 z=1.
5. let «b» denote the difference between b and its closest integer (for example, «.6» = .4). prove that
∏[i=o to n] |b-i| ≥ «b»*n!/(2^n).
6. given a sphere of radius r, find the locus of points through which it is possible to draw three tangent lines to the sphere that form a trihedral angle with three right faces.. |
yeah that was it.. :eyes:
damn i hate math, but kudos to you if you can do this and/or have a passion for it. Amazing! |
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