Search found 22 matches
- Sat Mar 18, 2017 8:15 pm
- Forum: Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)
- Topic: Finding n
- Replies: 1
- Views: 508
Finding n
Hi, so I know that n is defined as the number of electrons transferred in a reaction, but do you have to write out each half rxn to figure this out? Thanks!
- Wed Mar 15, 2017 8:54 pm
- Forum: *Cyclohexanes (Chair, Boat, Geometric Isomers)
- Topic: Hexane and Hectane
- Replies: 1
- Views: 501
Re: Hexane and Hectane
I think you probably would get marked off since hexane has 6 C and hectare has 7. ):
- Sun Mar 05, 2017 12:54 am
- Forum: *Organic Reaction Mechanisms in General
- Topic: Arrows
- Replies: 4
- Views: 860
Re: Arrows
The electrons are transferred from the bond that is broken, so you want to have the arrow pointing from the bond being broken to the element receiving the electrons (electrophile).
- Thu Mar 02, 2017 10:38 am
- Forum: Administrative Questions and Class Announcements
- Topic: Quiz 3 Prep answers
- Replies: 6
- Views: 1273
Re: Quiz 3 Prep answers
He usually posts them Sunday or Monday night right before the first quizzes!
- Sat Feb 25, 2017 5:10 pm
- Forum: Arrhenius Equation, Activation Energies, Catalysts
- Topic: Heterogeneous Catalysts [ENDORSED]
- Replies: 1
- Views: 490
Heterogeneous Catalysts [ENDORSED]
Hi, so I remember Dr. Lavelle briefly mentioning heterogeneous catalysts, but I was wondering if anyone could give an example of heterogeneous catalysts because I was a little confused about them? Thanks!
- Mon Feb 20, 2017 12:32 pm
- Forum: *Organic Reaction Mechanisms in General
- Topic: Equation Approaches
- Replies: 1
- Views: 469
Equation Approaches
Could someone explain the general difference between steady-state and pre-equilibrium approaches? I know if used correctly they give the same result, but when is it better to use one or the other?
- Sat Feb 11, 2017 9:50 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Has the formula sheet changed?
- Replies: 3
- Views: 845
Re: Has the formula sheet changed?
Also, I believe the laminated formula sheet for F forgot a decimal point. I believe it should be 96485.3, not 964853. I'm pretty sure the formula sheet given by Dr. Lavelle on quizzes had the correct conversion, however.
- Tue Feb 07, 2017 1:06 am
- Forum: Student Social/Study Group
- Topic: Study group for mid term
- Replies: 4
- Views: 1060
Re: Study group for mid term
Hi, what day were you planning on meeting?
- Sun Jan 29, 2017 2:28 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Discussion Section
- Replies: 2
- Views: 614
Re: Discussion Section
Yes it was, thank you so much for your concern.
- Fri Jan 20, 2017 10:55 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: Piston Diagram [ENDORSED]
- Replies: 1
- Views: 494
Piston Diagram [ENDORSED]
Hi, for the visual diagram provided on p.9 of the course reader, could someone explain what the surface area is referring to, and how that relates to a volume change? Thanks!
- Mon Jan 09, 2017 10:06 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Discussion Section
- Replies: 2
- Views: 614
Discussion Section
Hi, I am currently enrolled in discussion 3C (Tues, 4:00-4:50PM) but I have a time conflict with a different lecture. Would anyone in 3B, 3E, 3L, 3N, or 3O be willing to switch? Thanks so much!
- Wed Nov 30, 2016 8:45 pm
- Forum: *Molecular Orbital Theory (Bond Order, Diamagnetism, Paramagnetism)
- Topic: MO theory and Bond Order
- Replies: 1
- Views: 539
Re: MO theory and Bond Order
He2 is not stable because if you calculate the bond order it would be 1/2(2-2) = 0, meaning it's extremely unstable.
- Tue Nov 22, 2016 10:53 am
- Forum: Bronsted Acids & Bases
- Topic: KA VS KB
- Replies: 2
- Views: 651
Re: KA VS KB
Yes, Ka is used to represent the equilibrium constant for acids, and Kb represents the equ. constant for bases. The equations you use to find equ. constant is exactly the same for both Ka and Kb, just the actual quantity of the constants differ.
- Mon Nov 14, 2016 10:06 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: How do you find the number of attachment possible?
- Replies: 3
- Views: 794
Re: How do you find the number of attachment possible?
Does this mean that whenever en is used you count it as 2 coordination numbers? Also, is dien also 2?
- Tue Nov 08, 2016 9:38 pm
- Forum: Naming
- Topic: Naming Compounds
- Replies: 2
- Views: 604
Naming Compounds
For quiz 3/the final, will we need to know the Latin names of certain transition metals (i.e.: Ferrate)? It's not in the course reader but the example we had in discussion used it.
- Tue Nov 01, 2016 11:38 am
- Forum: Administrative Questions and Class Announcements
- Topic: Chem 14A Midterm Fall 2016 Rooms & Review Sessions
- Replies: 16
- Views: 9322
Re: Chem 14A Midterm Fall 2016 Rooms & Review Sessions
I noticed that sometimes the constant values given in our notes/course reader does not exactly match the laminated periodic table we received with the course reader. For example, h=6.626E-34 in our reader but is more specifically stated as h=6.62608E-34 on the periodic table Also c=3.00E8 vs c=2.99...
- Tue Oct 25, 2016 9:56 am
- Forum: Electron Configurations for Multi-Electron Atoms
- Topic: chapter 3 #13B
- Replies: 2
- Views: 556
Re: chapter 3 #13B
It is because half-filled orbitals are more stable. This goes along with the electron configuration exceptions (i.e. Cr and Cu).
- Wed Oct 19, 2016 1:14 pm
- Forum: Ionic & Covalent Bonds
- Topic: Base Notation [ENDORSED]
- Replies: 2
- Views: 698
Base Notation [ENDORSED]
For NH3, the element is denoted with 2 vertical dots on its left. Does this just denote that it is a base? I was a little confused if this notation is supposed to apply to all bases, because other elements (F-, OH) don't have that dot notation.
- Thu Oct 13, 2016 1:44 pm
- Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
- Topic: Significant Figures
- Replies: 4
- Views: 1082
Re: Significant Figures
Wait, but when we use significant figures, we are supposed to take that of the number with the least significant figures, so shouldn't it just be one significant figure adapted from the n=3? Or does that just not count?
- Thu Oct 06, 2016 12:19 pm
- Forum: Photoelectric Effect
- Topic: Work Function and Threshold Energy [ENDORSED]
- Replies: 3
- Views: 4795
Re: Work Function and Threshold Energy [ENDORSED]
Work function and threshold energy do have slight differences, but in the chem course reader Professor Lavelle used them interchangeably when describing an equation.
- Fri Sep 30, 2016 1:59 pm
- Forum: Properties of Light
- Topic: Black Body Radiation
- Replies: 2
- Views: 754
Re: Black Body Radiation
From what Professor Lavelle mentioned, we won't really need to use black body radiation regularly, I believe. However, black bodies are just a hypothetical term for materials that absorb all frequencies (but no material actually does this). It was just mentioned as a contrast to atoms since, unlike ...
- Fri Sep 30, 2016 1:53 pm
- Forum: Student Social/Study Group
- Topic: Saxon Study Group
- Replies: 36
- Views: 4611
Re: Saxon Study Group
Hi, I'm guessing I missed the meeting, but I would also like to join! Did you decide on a time to study?