Q&A for 20A-3
 

Question:

Date Submitted: Tue Dec 13 10:26:57 US/Pacific 2005
Student Name: Walberto
Student Email: walburruel@hotmail.com
Submitted from:

Are we getting the Final back? And if so, when? Thanks


Answer:

two or three weeks after return to classes. They can be collected from chemical stores. e.s.



Question:

Date Submitted: Sat Dec 10 13:59:23 US/Pacific 2005
Student Name: Pavan
Student Email: pnarsai@ucla.edu
Submitted from:

Professor, I have 2 questions: (1) How do you know the magnetic properties of transition metal complexes? The course reader mentions "magnetic properties", but that is it. (2) What kind of reaction occurs for the polymers you went over yesterday (which included teflon, polystyrene, and PVC)? the coursereader does not state a name for this reaction (where the pi bond breaks, allowing for a carbon chain to form). The only name the course reader gives is the condensation reaction, which occurs in the formation of nylon (amide forms, and H20 is released) Thank You, Pavan Narsai


Answer:

You determine how many unpaired electrons are present by considering the spectrochemical series and the aufbau principle. No unpaired electrons implies no magnetic properties, or strictly speaking, diamagnetism meaning a weak repulsion by a magnetic field. e.s.



Question:

Date Submitted: Thu Nov 3 22:56:32 US/Pacific 2005
Student Name: A. Chandani
Student Email: asc2106@columbia.edu
Submitted from:

Professor Scerri, Do you know the date/time of the final exam? If so, please advise. Thank you. ~A


Answer:

take a look at my ucla.



Question:

Date Submitted: Thu Nov 3 20:25:37 US/Pacific 2005
Student Name: Matt Thomas
Student Email: mathomas@ucla.edu
Submitted from:

Do we need to be able to express energy levels in spectroscopic as well as box diagram notation?


Answer:

yes



Question:

Date Submitted: Mon Oct 31 10:37:22 US/Pacific 2005
Student Name: Calvin Lee
Student Email: calvinlee29@yahoo.com
Submitted from:

What part of the book should we read that corresponds to what we're learning in class?


Answer:

see the syllabus on the website



Question:

Date Submitted: Mon Oct 24 20:28:29 US/Pacific 2005
Student Name: Munira Rahman
Student Email: rahman87@ucla.edu
Submitted from:

In general, how does one calculate number of photons if energy and frequency are given? Or vice versa, how does one calculate energy if photons and wavelength are given? Are we supposed to use Avogadro's number in the process?


Answer:

I would need to see a specific problem. But in general yes you can go from energy per mole of photons to energy per photon by dividing by Avogadro's number. e.s.



Question:

Date Submitted: Tue Oct 11 11:03:24 US/Pacific 2005
Student Name: Dino Gonzales
Student Email: www.gonzales11@netzero.com
Submitted from:

In stoichiometry, is the difference between a normal limiting reagent problem and a percent yeild problem is that the percent yeild problem has a third variable to solve and an extra step required to get the answer???


Answer:

Once and for all, all questions pertaining to Mastering Chemistry should be E-mailed to marek. His E-mail is on the web page in one of the MC files. e.s.



Question:

Date Submitted: Sun Oct 9 23:30:50 US/Pacific 2005
Student Name: Terence Honles
Student Email: terencehonles@ucla.edu
Submitted from:

I was wondering if there was a way to verify if you have taken the test. I took only the section "unit test" and I scored above 85% and I was wondering if you had to answer all the questions or just take the unit tests to satisfy the requirement... and I saw something about 12 days between taking tests, does that mean 12 days between taking the same unit test, or 12 days between any unit test. Respectfully, Terence Honles


Answer:

Send an E-mail to marek. Once and for all, questions concerning MC should be sent to him. e.s.



Question:

Date Submitted: Tue Oct 4 22:01:59 US/Pacific 2005
Student Name: Stephanie Gachot
Student Email: smgachot@hotmail.com
Submitted from:

Professor Scerri, I was wondering how we can find out when the Mastering Chemistry quizzes are due. I have been looking on this website and am unable to find any due dates. Will you be telling us in class?


Answer:

Sould be there on the web pages. I have asked marek to clarify this in any case. e.s.



Question:

Date Submitted: Sun Oct 2 11:34:21 US/Pacific 2005
Student Name: Nick Kusnezov
Student Email: liquidsnake647@yahoo.com
Submitted from:

I have been trying to access the "Mastering Chemistry" quiz websites in an attempt to set the program up on my own computer but many pages will not load and many download links do not load either. I am curious as to how to proceed.


Answer:

As I said in class, send E-mail to marek who is the MC administrator. See web pages for his E-mail. e.s.




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Last revision: June 28, 2005