Search found 21 matches
- Wed Mar 09, 2016 1:41 am
- Forum: *Alkanes and Substituted Alkanes (Staggered, Eclipsed, Gauche, Anti, Newman Projections)
- Topic: Conformational Energy Diagrams
- Replies: 2
- Views: 680
Conformational Energy Diagrams
In lecture as well as the organic chemistry textbook, we discussed the stability of conformation to be able to find the potential energy. We will be required to know the conformational energy diagrams for various other dihedral angles?
- Sat Mar 05, 2016 6:29 pm
- Forum: *Haloalkanes
- Topic: Functional Groups [ENDORSED]
- Replies: 7
- Views: 2916
Re: Functional Groups [ENDORSED]
I believe we do since we covered most of the functional groups within that chart in the course reader and we discussed them in lecture and sections, but if we aren't responsible for them, it doesn't hurt to know them.
- Sat Feb 27, 2016 8:44 pm
- Forum: *Nucleophiles
- Topic: Determining nucleophilicity
- Replies: 5
- Views: 1421
Re: Determining nucleophilicity
Kelly Huang 3L wrote:What about F?
I believe F is an electrophile as it is a radical. Whereas F-, would be a strong base nucleophile.
- Thu Feb 18, 2016 5:05 pm
- Forum: *Nucleophiles
- Topic: Determining nucleophilicity
- Replies: 5
- Views: 1421
Determining nucleophilicity
Since a Lewis Acid/Base can be terms used interchangeably with Electrophiles and Nucleophiles, can one use that relationship to determine nucleophilicity? For example, basisity increases across a row from right to left, the strength of a nucleophile does so as well? What else dictates nucleophilicit...
- Sat Feb 13, 2016 11:31 am
- Forum: Balancing Redox Reactions
- Topic: Oxidation States
- Replies: 8
- Views: 1620
Re: Oxidation States
I memorized a few oxidation states for the midterm and I somewhat remember how to calculate them from Chem 14A, however I was wondering what other methods you guys implemented in finding the oxidation states for the cathodes and anodes because it took quite a while for me to be sure with my answers.
- Sat Feb 06, 2016 1:47 pm
- Forum: Interesting Applications: Rechargeable Batteries (Cell Phones, Notebooks, Cars), Fuel Cells (Space Shuttle), Photovoltaic Cells (Solar Panels), Electrolysis, Rust
- Topic: Chapter 14 Excersie 114
- Replies: 1
- Views: 446
Chapter 14 Excersie 114
It states to estimate the average current through the body with the assumption that delta_G is 10 MJ. I understand how to solve this question, however, with this in mind, I was wondering if these types of applications will be utilized on future quizzes and tests?
- Sat Jan 30, 2016 5:56 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Midterm
- Replies: 1
- Views: 477
Midterm
I want to get a head start on the rest of the topics to be covered for the midterm, so I was wondering what chapters are we approximately going to complete before the midterm?
- Sat Jan 23, 2016 7:13 pm
- Forum: Gibbs Free Energy Concepts and Calculations
- Topic: Gibbs free energy concept
- Replies: 1
- Views: 449
Gibbs free energy concept
I just wanted to clarify if the standard state of the reactions must be that the partial pressures of the gases would be 0.1 MPa as well as any other variations would affect calculations?
- Sun Jan 17, 2016 7:52 am
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3998491
Re: Chemistry Jokes
Never trust an atom
They make up everything.
They make up everything.
- Sat Jan 09, 2016 5:14 am
- Forum: Concepts & Calculations Using First Law of Thermodynamics
- Topic: 8.10 units question
- Replies: 3
- Views: 784
Re: 8.10 units question
Just to clarify, unless otherwise stated we should always convert Joules just to be safe?
- Sat Dec 05, 2015 8:56 pm
- Forum: Student Social/Study Group
- Topic: Post All Chemistry Jokes Here
- Replies: 9651
- Views: 3998491
Re: Chemistry Jokes
A little fun while studying for the final,
-What weapon can you make from the elements potassium, nickel, and iron?
~A KNiFe
-Where;s the best place to buy potassium?
~K-Mart
-What weapon can you make from the elements potassium, nickel, and iron?
~A KNiFe
-Where;s the best place to buy potassium?
~K-Mart
- Sat Nov 28, 2015 10:22 pm
- Forum: Equilibrium Constants & Calculating Concentrations
- Topic: Fall 2015 Quiz 3 #5
- Replies: 1
- Views: 530
Fall 2015 Quiz 3 #5
This question was regarding the second part of #5 where it states that you find in a publication that a researcher in China has studied the same reaction at the same temperature, but she wrote the reaction in the form NH 3 (g) <-> N 2 (g) + 3H 2 (g). The original equation being N 2 (g) + 3H 2 (g) <-...
- Sat Nov 21, 2015 7:23 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Last Class Lecture
- Replies: 1
- Views: 695
Last Class Lecture
Approximately when will we be finished covering new material? Since it'll be week nine, I just wanted to know so I can plan studying cumulatively.
Thank you!
Thank you!
- Sat Nov 14, 2015 5:01 pm
- Forum: Ideal Gases
- Topic: Real Gases Clarification
- Replies: 1
- Views: 591
Real Gases Clarification
So essentially as pressure increases, the volume decreases and approaches zero but never reaches zero and real gases also contain intermolecular forces. This then makes the most ideal gas one with the smallest amount of molecules and the one with the least amount of intermolecular forces, correct?
- Sat Nov 07, 2015 9:46 pm
- Forum: Shape, Structure, Coordination Number, Ligands
- Topic: Metals
- Replies: 1
- Views: 425
Metals
I know we have not covered this, but I decided to look further into the types of ligands, or macrocrycles, that are connected to metals. I was wondering if I could get examples of these?
Thank you!
Thank you!
- Wed Nov 04, 2015 5:01 pm
- Forum: Administrative Questions and Class Announcements
- Topic: Blue book?
- Replies: 1
- Views: 683
Re: Blue book?
I believe we don't need a blue book. In the link below, they said that all we needed was a pen, calculator, and photo ID. We're also not allowed to bring our backpacks in. https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=157&t=6903&sid=8bbd3d72977901416d102407f5752c41 Hope this helps!
- Sat Oct 31, 2015 9:43 pm
- Forum: Determining Molecular Shape (VSEPR)
- Topic: VSEPR Shape Chart
- Replies: 1
- Views: 632
VSEPR Shape Chart
I decided to make chart when I was determining the shapes and molecules of ions. It really helped me out and I think it could help others as well.
I just wanted to make sure if everything is correct and if we could use "bent" and "angular" interchangeably?
Thank you!
I just wanted to make sure if everything is correct and if we could use "bent" and "angular" interchangeably?
Thank you!
- Sat Oct 24, 2015 9:31 pm
- Forum: Bond Lengths & Energies
- Topic: Question 3.101
- Replies: 1
- Views: 584
Question 3.101
I understand that the isolobal analogy applies to chemical fragments with similar valence-orbital structures that can replace others in the molecule, but I wanted to clarify if it is also because of similar shapes, energy, and number of electrons as well?
- Fri Oct 16, 2015 8:00 pm
- Forum: Resonance Structures
- Topic: Angstrom Calculation
- Replies: 2
- Views: 1237
Angstrom Calculation
I saw a previous post that concerned this as well, but it didn't fully answer my question. When we went over the N--O bond length in NO3- which equals 1.24 Å in lecture, I was wondering where the angstrom calculation came from?
- Thu Oct 08, 2015 7:44 pm
- Forum: Trends in The Periodic Table
- Topic: Diagonal Relationships
- Replies: 1
- Views: 453
Diagonal Relationships
I understand the concept of diagonal relationships of elements as being similar in their chemical properties. Other than this being due to the size of their ions, what else can cause these likenesses?
- Wed Sep 30, 2015 9:07 pm
- Forum: DeBroglie Equation
- Topic: Lab Detection
- Replies: 1
- Views: 513
Lab Detection
The worked examples for the De Broglie equation in the course reader asked if the wavelength could be experimentally detected in the lab. The answer being 1.4 x 10^-10 m. Is there any specific measurement for a wavelength that would deem it unverifiable?