Recent content by yungwun22

it's 1/(4*pi*episolon naught) where episolon naught is 8.85 x 10^-12 F/m. yes, e is the elementary charge.

Homework Statement I'm not really sure how to go about thisHomework Equations whenever I plug in the correct values I don't get 1. Unless I'm supposed to use au. The Attempt at a Solution

Homework Statement I know about particle/wave duality; however, when I read a passage and it says the wavelength of the particle I'm not sure what it's referring to. Is it the actual wavelength of the particle or the wavelength of the wavefunction for a particular eigenvalue? Homework...

Homework Statement I read that the peptide group that links two amino acids is planar because of the partial double bond character arising from resonance. I don't understand how the planarity arises though. Also, how is resonance stabilizing? Homework Equations The Attempt at a...

Homework Statement The problem reduces the derivative (dZ/d(1/V)) to (dZ/dV) x (dV/d(1/V)), where Z is the compression factor and v is molar volume. It further shows that it equals -V^2(dZ/dV). I don't know how they arrived at that value because by my logic it should be 1/(-V^2)...

Homework Statement This application makes no sense. The way I see it if, for example, the reaction temperature is increased and the reaction is endothermic, absorbing the heat to counteract the change makes no sense. If the temperature increases, the kinetic energy is increased, so releasing...

It is for a BS degree and I hope to find a job after I finish. I don't want go to graduate school, but if I have to the most i will do is a non-thesis master's program. HPLC is likely going to be my topic in undergraduate research. I'm also looking for internships, whatever experience I can get...

Homework Statement There is a formula which says the change (delta) of volume of a mixture is equal to the partial derivative of delta G with respect to pressure at constant temperature. I don't understand how there can be a derivative and the delta used at the same time on G. I thought that...

I plan on going into analytical research probably in HPLC, spectroscopy or mass spec. I got C's in both semesters mostly because of personal problems and I had class overloads. Going into both finals I had A's but I couldn't pull it out on the exams. I'm currently in physical chemistry and...

I'm a first semester junior with a current gpa of 2.77; my organic series last year really hurt me. I believe at the end of this semester I may be able to pull a 2.9 and after the spring a high 2.9, low 3.0. In addition, I plan to engage in undergraduate research. Assuming that I maintain that...

Because the rate increases in the first and decreases in the second, but that there is an increase of energy in both scenarios. I felt that there should be a high reaction rate in the second scenario as well.

Homework Statement I know that temperature and kinetic energy are related, so as temperature increases the energy of the reactants as well as the amount of collisions and bonds formed, increases. I take this as meaning that the rate increases. But I also read in my organic book that in...

No, the percent recovery. (mass of pure compound)/(mass of impure compound) x 100 %. I'd only heard of percent yield before this class, but this formula is what was given. Only to be used in purification processes.

Homework Statement I recrystallized an unknown carboxylic acid, then found the melting point of the dried compound and identified it. The melting point range was narrow and that said to me that the compound was pure, but the percent recovery was very low (< 40 %). Indicating there was still a...

Homework Statement I did an experiment where an extraction was done with an unknown carboxylic sample. Some mass of it was mixed with ether and aqueous NaOH then aqueous layer extracted, etc. The question asks though, why is the unknown compound soluble in aq. base not acid. Also, describe a...