Recent content by Gannon

Where's the question?

R is 1.987E -3 kcal/mol/degree; F is 23.1 kcal/V/mol.

The redox midpoint potential (Eo’) of NAD+/NADH at pH 7.0 is -320 mV. If the total concentration of {[NAD+] + [NADH]} is 1.5 mM in cells, and the cellular redox potential is about -200 mV, what are the concentrations of [NAD+] and [NADH], respectively? Under certain oxidative stress...

I've never had to do graphs, but that sounds right. Anti usually has less steric and torsional strain than anti; therefore rotating from gauche leads to a decrease in energy (negative) while pushing an anti conformation into the gauche position is energetically unfavorable (which requires...

I'm wildly guessing here, but if "percent by weight" somehow is supposed to mean "percent by mass," it would make things pretty easy; in 1.16g/mL, 28% of 1.16g would be HCl: (1.16g/mL)(0.28) = 0.3248g/mL. From there, you can do some converting to eventually get to pH; I'll assume for now...

Homework Statement An industrial laser is used to burn a hole through a piece of metal. The average density of the light is S = 1.24E9 W/m2. What is the rms value of each of the following fields in the electromagnetic wave emitted by the laser? Homework Equations S = ceoE2 S = (c/uo)B2...

Wow, so this is much more complicated then I was led to believe; I'll leave you to it.

Exactly, so assuming that an LCD-appropriate molecule must be polar, I would say A.

Of course; my mind has been a bit flighty the past few weeks. I guess I'll stop trying to help!

I think you're solid; the IR spectrum spike between 1750/cm denotes a C=O bond. The NMR spectrum implies that all hydrogens in the molecule produce the same signal, and must have the same environments (symmetrical on the molecule); this spike is also pretty far from the starting point which...

Electronegativity is a trend on the periodic table: electronegativity increases as the table moves from LEFT to RIGHT and from BOTTOM to TOP. C and H have similar electronegativities, which make their association nonpolar. The cyano group (CN) is a pretty good one, as nitrogen (N) is far to the...

Ah, I didn't even notice that the charges were the same!

The radius of an atom is determined by its overall size and its electronegativity, but in this case the atoms are very similar in size. Chlorine is more electronegative and will pull its electrons in more, decreasing its radius. Potassium is very weakly electronegative, and would rather extend...

The most polar molecule will have a very electronegative group attached. Can you see any?

I have pretty much solved it, though I had a feeling the link wouldn't work. Thanks, though!