Search found 41 matches

by Angelica Soriano 1F
Wed Nov 18, 2020 8:06 pm
Forum: Dipole Moments
Topic: Dipole-Dipole Interactions
Replies: 3
Views: 22

Re: Dipole-Dipole Interactions

Hello! So you will know if there is a dipole-dipole interaction between two molecules (of the same type) if there's a dipole moment. A dipole moment occurs within a molecule when there is a sizable electronegativity difference between two atoms, so one atom will pull the electrons more towards itsel...
by Angelica Soriano 1F
Wed Nov 18, 2020 7:43 pm
Forum: Student Social/Study Group
Topic: post midterm 2
Replies: 27
Views: 200

Re: post midterm 2

I actually felt that this midterm was a lot simpler than the previous one, mostly the material is more conceptual than math based. I worry too much about calculations :( I feel the same way!! Although I was a bit confused by the wording of some of the questions, I think that this was a bit easier t...
by Angelica Soriano 1F
Tue Nov 17, 2020 11:54 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B enrollment [ENDORSED]
Replies: 7
Views: 104

Re: Chem 14B enrollment [ENDORSED]

Okay cool, I was just going to wait through the second pass and hope enough people drop so that we can find a spot :( hopefully some spots open up! Professor Lavelle just came out and said that winter enrollment in all his classes will increase! :D I linked it down below. https://lavelle.chem.ucla....
by Angelica Soriano 1F
Tue Nov 17, 2020 10:45 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B enrollment [ENDORSED]
Replies: 7
Views: 104

Re: Chem 14B enrollment [ENDORSED]

I was wondering this too :( I think we might be able to switch into the class after our second pass if someone drops the class. I saw another post asking about waitlist spots opening up in January so I hope that we'll be able to do this.
by Angelica Soriano 1F
Tue Nov 17, 2020 10:42 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem14B Waitlist Spots
Replies: 5
Views: 50

Re: Chem14B Waitlist Spots

Chem 14B filled up :( My enrollment pass starts at 11 pm and I'm not really sure what to do. I think I will start LS7A but I'm unsure what to do for my third class. I'm saving LS7A for my second pass but now I'm not sure what to take because I was going to enroll in Chem 14B and LS30B.
by Angelica Soriano 1F
Tue Nov 17, 2020 10:36 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14B enrollments
Replies: 1
Views: 38

Re: Chem 14B enrollments

I'm not sure but I was unable to get a spot because all of the spots have been taken, including the waitlist. Do you know if I can still get in even if it says "closed?"
by Angelica Soriano 1F
Mon Nov 16, 2020 10:52 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Textbook Problem 1E.5
Replies: 2
Views: 16

Re: Textbook Problem 1E.5

I think it is because the s orbital is closer to the nucleus than the p orbital. So the electrons in the s orbital experience a greater effective nuclear charge than the electrons in the p orbital as the p orbital is further away from the nucleus and the electrons in s orbital shield some of that c...
by Angelica Soriano 1F
Mon Nov 16, 2020 10:43 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Textbook Problem 1E.5
Replies: 2
Views: 16

Textbook Problem 1E.5

Hi, can someone explain why "Zeffe for an electron in a p-orbital is lower than for an electron in an s-orbital in the same shell" is true?
by Angelica Soriano 1F
Mon Nov 16, 2020 10:07 am
Forum: Dipole Moments
Topic: Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole
Replies: 6
Views: 37

Re: Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole

A dipole-induced dipole is different than LDF since a dipole-induced dipole is between a polar and nonpolar molecule while an LDF is between two nonpolar molecules. LDFs are intermolecular so it will involve interactions between the same molecules (ex: cl2, h2, o2). I'm still a bit confused because...
by Angelica Soriano 1F
Mon Nov 16, 2020 9:59 am
Forum: Dipole Moments
Topic: Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole
Replies: 6
Views: 37

Re: Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole

For your first question, yes they're the same thing just with different names (synonymous with Vanderwaal's too). For your second question, yes as well. London dispersion forces are always present because of the atom's electrons; think of it as like the "minimum force" they can have. Hope...
by Angelica Soriano 1F
Mon Nov 16, 2020 9:49 am
Forum: Dipole Moments
Topic: Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole
Replies: 6
Views: 37

Difference between Dipole-Induced Dipole vs LDF/Van der Waals/Induced dipole-Induced dipole

Hi! I was just wondering if dipole-induced dipole intermolecular forces are different from London dispersion forces (and the other names it goes by). When I was in high school, my chem teacher grouped them together. Just to clarify, dipole-induced dipole IMFs are between a molecule with a permanent ...
by Angelica Soriano 1F
Mon Nov 16, 2020 2:47 am
Forum: Determining Molecular Shape (VSEPR)
Topic: Midterm #2
Replies: 14
Views: 68

Re: Midterm #2

AJForte-2C wrote:I thinks this midterm is going to be less math based, so how are you guys studying for it?


I'm studying by going over the concepts in his outlines and seeing if I am able to explain it correctly without looking at other resources.
by Angelica Soriano 1F
Mon Nov 16, 2020 2:43 am
Forum: Dipole Moments
Topic: Which interactions are intermolecular?
Replies: 7
Views: 27

Re: Which interactions are intermolecular?

Yes, you're correct. Intermolecular forces are forces between molecules while intramolecular forces are within molecules. An example of an intramolecular force would be a covalent bond.
by Angelica Soriano 1F
Tue Nov 10, 2020 7:44 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Questions
Replies: 16
Views: 77

Re: Midterm 2 Questions

From the workshop today, Michael told us that the questions are going to be shorter because they're not math-based. However, he said the midterm should be around the same length as the last midterm because it should be faster to answer these questions.
by Angelica Soriano 1F
Tue Nov 10, 2020 7:38 pm
Forum: Student Social/Study Group
Topic: Test Anxiety
Replies: 62
Views: 226

Re: Test Anxiety

When my anxiety gets really bad, I usually do something My HS english teacher taught me. I write down everything that could go wrong with the test and everything I'm worried about right before I take the test. Writing lets me vent my worries out and I feel like that really helps!
by Angelica Soriano 1F
Tue Nov 10, 2020 7:34 pm
Forum: Student Social/Study Group
Topic: Exercising Our Minds and Bodies
Replies: 76
Views: 216

Re: Exercising Our Minds and Bodies

Nane Onanyan 1H wrote:Learning the choreo for "I Cant Stop Me" by twice B)


Hi fellow Once B)

I wish I could learn the choreo to "I Can't Stop Me" but Twice's choreos are too hard.
by Angelica Soriano 1F
Sun Nov 08, 2020 7:26 pm
Forum: Student Social/Study Group
Topic: sapling due date
Replies: 7
Views: 27

Re: sapling due date

Yes, it'll be due on Sunday midnight next week. :-)
by Angelica Soriano 1F
Wed Oct 28, 2020 5:15 pm
Forum: Administrative Questions and Class Announcements
Topic: Audio-Visual Focus Topics
Replies: 14
Views: 87

Audio-Visual Focus Topics

Hi, will there be more Audio-Visual Focus topics released later during the quarter? I found these really helpful while studying and was just wondering if we will get more for other topics. Thank you Dr. Lavelle for providing these resources! :-)
by Angelica Soriano 1F
Mon Oct 26, 2020 11:14 pm
Forum: Properties of Electrons
Topic: Sapling Homework #14
Replies: 5
Views: 49

Re: Sapling Homework #14

I'm pretty sure n2 = 7, and with that you would get the v = R((1/n1^2) - (1/n2^2)) to be 3.29*10^15 x ((1/4)-(1/49)). Why does n2=7? Sorry, I just looked back at your post and realized you said your n2=6. I'm not sure if we have different questions, but my #14 on Sapling states: Calculate the wavel...
by Angelica Soriano 1F
Mon Oct 26, 2020 9:34 pm
Forum: Properties of Electrons
Topic: Sapling Homework #14
Replies: 5
Views: 49

Re: Sapling Homework #14

Racquel Fox 3L wrote:I'm pretty sure n2 = 7, and with that you would get the v = R((1/n1^2) - (1/n2^2)) to be 3.29*10^15 x ((1/4)-(1/49)).


Why does n2=7?
by Angelica Soriano 1F
Mon Oct 26, 2020 8:00 pm
Forum: Properties of Electrons
Topic: Sapling Homework #14
Replies: 5
Views: 49

Sapling Homework #14

Hi! I had a question on question #14, which follows: Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n=6 to the level n=2. I used the equation v=R[1/n1^2-1/n2^2) and plugged n1=2 and n2=6. Then,...
by Angelica Soriano 1F
Mon Oct 26, 2020 6:21 pm
Forum: Administrative Questions and Class Announcements
Topic: Step Up Sessions
Replies: 71
Views: 4361

Re: Step Up Sessions

Also are all UA peer-learning and TA office hours happening as usual for this week or are they cancelled because it is a midterm week? All are open to assist students. I announced this in my 1am class email 6 hours ago. Hi, I'm trying to access Melody's step-up session, but it says that it needs th...
by Angelica Soriano 1F
Mon Oct 26, 2020 3:01 pm
Forum: Student Social/Study Group
Topic: Forming Virtual Study Group
Replies: 31
Views: 135

Re: Forming Virtual Study Group

Hi, thank you for this! I joined the group me! :-)
by Angelica Soriano 1F
Mon Oct 26, 2020 12:06 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Sapling Homework #6
Replies: 2
Views: 44

Re: Sapling Homework #6

The wavelength range would be the shortest wavelength possible (n=7 to n=1) and the longest wavelength possible (n=7 to n=6). The reason the shorter wavelength is to a lower energy level is because this energy difference is much greater, which means the frequency of light emitted is longer, therefo...
by Angelica Soriano 1F
Mon Oct 26, 2020 1:59 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: Sapling Homework #6
Replies: 2
Views: 44

Sapling Homework #6

Hi! I'm having trouble approaching this problem. The electron in a hydrogen atom is excited to the n=7 shell and emits electromagnetic radiation when returning to lower energy levels. Determine the number of spectral lines that could appear when this electron returns to the lower energy levels, as w...
by Angelica Soriano 1F
Sun Oct 25, 2020 8:20 pm
Forum: Administrative Questions and Class Announcements
Topic: CCLE website
Replies: 12
Views: 49

Re: CCLE website

I'm able to go on CCLE now! It should work for you. :)
by Angelica Soriano 1F
Sun Oct 25, 2020 7:40 pm
Forum: Student Social/Study Group
Topic: How to relax
Replies: 97
Views: 365

Re: How to relax

I like to listen to music, watch Netflix, and go on drives. I've been getting into crocheting and sewing though! :D
by Angelica Soriano 1F
Sun Oct 25, 2020 2:30 pm
Forum: Student Social/Study Group
Topic: Study Groups/Zoom Sessions?
Replies: 3
Views: 41

Re: Study Groups/Zoom Sessions?

Hello, if you want to review and study concepts the peer learning and step up programs are super helpful to me. Even if you don't have any particular question, sitting in and listening to the questions of other students would help with reviewing! However, if you're looking for specific sessions tha...
by Angelica Soriano 1F
Mon Oct 19, 2020 10:35 am
Forum: Administrative Questions and Class Announcements
Topic: Built-in webcams/Equipment request [ENDORSED]
Replies: 22
Views: 698

Re: Built-in webcams/Equipment request [ENDORSED]

Angelica Soriano 1F wrote:
Jamie2002 wrote:Having zoom on your phone should be good enough! At least that is what my TA told me


To clarify, does that mean we'll connect to zoom on our phone and then take the midterm on another device so we can open up respondus?


Never mind! I just read the other thread. Thank you.
by Angelica Soriano 1F
Mon Oct 19, 2020 10:33 am
Forum: Administrative Questions and Class Announcements
Topic: Built-in webcams/Equipment request [ENDORSED]
Replies: 22
Views: 698

Re: Built-in webcams/Equipment request [ENDORSED]

Jamie2002 wrote:Having zoom on your phone should be good enough! At least that is what my TA told me


To clarify, does that mean we'll connect to zoom on our phone and then take the midterm on another device so we can open up respondus?
by Angelica Soriano 1F
Mon Oct 19, 2020 10:22 am
Forum: Administrative Questions and Class Announcements
Topic: Petition to Bring Music Back To Lectures [ENDORSED]
Replies: 34
Views: 526

Re: Petition to Bring Music Back To Lectures [ENDORSED]

Chem_Mod wrote:I got something going for Monday. Enjoy. :-)


I really liked the song and your music taste!! I had to shazam it so I can add it to one of my playlists. Thank you for the new music. :D
by Angelica Soriano 1F
Sun Oct 18, 2020 1:08 pm
Forum: Administrative Questions and Class Announcements
Topic: UCLA Store Updates on Ebook/Sapling access card
Replies: 16
Views: 128

Re: UCLA Store Updates on Ebook/Sapling access card

I bought it but it still hasn't shipped to me and I haven't received any info on the shipping. Will our free trial be extended if it doesn't come in time before that?
by Angelica Soriano 1F
Sun Oct 18, 2020 1:04 pm
Forum: Empirical & Molecular Formulas
Topic: Molecular vs. Formula Units
Replies: 5
Views: 59

Re: Molecular vs. Formula Units

This definitely does help more with my understanding, but can someone explain to me how you could calculate them as well? Like if were to have an example, would someone be able to walk me through it? I know it is a long process to type out, but I would really appreciate it! Yes of course! If you ha...
by Angelica Soriano 1F
Fri Oct 16, 2020 8:10 pm
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: E=h*V explanation in atomic spectra
Replies: 3
Views: 29

Re: E=h*V explanation in atomic spectra

Due to the Law of Conservation of Energy, the energy of the photon (E) is equal to the difference in energy (delta E) between the electron at its excited state and ground state.
by Angelica Soriano 1F
Fri Oct 16, 2020 11:44 am
Forum: Properties of Electrons
Topic: Bound vs. Free Electrons
Replies: 6
Views: 37

Bound vs. Free Electrons

Hi, during today's lecture Dr. Lavelle states that bound electrons have lower energy than free electrons. What is the difference between bound and free electrons? Are free electrons the ones that have been excited?
by Angelica Soriano 1F
Wed Oct 14, 2020 1:50 pm
Forum: Significant Figures
Topic: Sig Fig Process
Replies: 13
Views: 103

Re: Sig Fig Process

I forget how you determine what the best number of sig figs to round to at the end of a question is, based on the numbers you are given. Can anyone help clarify this for me? When multiplying or dividing, look for the least amount of sig figs in the numbers given and use that amount to round off you...
by Angelica Soriano 1F
Wed Oct 07, 2020 11:55 am
Forum: Limiting Reactant Calculations
Topic: Sapling Homework Question 10
Replies: 16
Views: 212

Re: Sapling Homework Question 10

The first thing I did was figure out the molecular formulas or 2butone and 3 methyl. Every like "point" or "corner" is a carbon molecule. Every carbon molecule forms 4 bonds. So we have to imagine there are hydrogen molecules attached to each carbon to fulfill these 4 bonds. So ...
by Angelica Soriano 1F
Wed Oct 07, 2020 11:53 am
Forum: Limiting Reactant Calculations
Topic: Sapling Question #10
Replies: 9
Views: 123

Re: Sapling Question #10

I ended up with the same answer but never got 72.1 g/mol for 2 butanone and am not sure where everyone is getting that calculation? Is that just from getting the molecular formula and then determining the molar mass? I actually just googled the molar mass of butanone :') I'm not sure if we were sup...
by Angelica Soriano 1F
Tue Oct 06, 2020 10:54 pm
Forum: Molarity, Solutions, Dilutions
Topic: Sapling 6
Replies: 5
Views: 74

Re: Sapling 6

We are given the mass of CuNo3 but we know that we need the number of moles CuNO3 to eventually find the volume. In order to convert mass to moles, you divide the given mass (6.41 g) by the molar mass of CuNO3. Once you calculate moles CuNO3, you are now able to find the volume in L. Molarity is M =...
by Angelica Soriano 1F
Tue Oct 06, 2020 10:41 pm
Forum: Student Social/Study Group
Topic: GroupMes for Chem 14A Fall 2020
Replies: 24
Views: 204

Re: GroupMes for Chem 14A Fall 2020

Hi, is there one for Dis 1F?
by Angelica Soriano 1F
Tue Oct 06, 2020 10:36 pm
Forum: Balancing Chemical Reactions
Topic: Reaction Terminology "In excess"
Replies: 11
Views: 98

Re: Reaction Terminology "In excess"

Yes, when a question refers to something as "in excess" it's a reactant! This means that O2 in this problem isn't completely used up and reacts with caproic acid, which is the limiting reactant.

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