Search found 55 matches

by Chenning Yang Dis3l
Tue Dec 15, 2020 10:40 am
Forum: Lewis Structures
Topic: Octet rule
Replies: 12
Views: 119

Re: Octet rule

Thank you for the post!
by Chenning Yang Dis3l
Tue Dec 15, 2020 10:40 am
Forum: Quantum Numbers and The H-Atom
Topic: n=6,l=5
Replies: 6
Views: 98

Re: n=6,l=5

Yes! l =<(n-1)
by Chenning Yang Dis3l
Tue Dec 15, 2020 10:38 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Determining an orbital
Replies: 10
Views: 95

Re: Determining an orbital

The l quantum number will determine the subshell.
by Chenning Yang Dis3l
Tue Dec 15, 2020 10:36 am
Forum: DeBroglie Equation
Topic: p
Replies: 19
Views: 173

Re: p

p is the momentum!
by Chenning Yang Dis3l
Tue Dec 15, 2020 10:33 am
Forum: Hybridization
Topic: Double Pi Bonds
Replies: 6
Views: 78

Re: Double Pi Bonds

This is a great question! I was wondering.
by Chenning Yang Dis3l
Tue Dec 15, 2020 10:32 am
Forum: Determining Molecular Shape (VSEPR)
Topic: axial/equatorial
Replies: 5
Views: 59

Re: axial/equatorial

Thank you for the info!
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:21 am
Forum: Biological Examples
Topic: Hemoglobin vs. Myoglobin
Replies: 29
Views: 256

Re: Hemoglobin vs. Myoglobin

Myoglobin transports oxygen in muscle cells, while hemoglobin transports oxygen in blood!
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:20 am
Forum: Shape, Structure, Coordination Number, Ligands
Topic: coordination number
Replies: 13
Views: 80

Re: coordination number

THank you for the info I was confused!
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:18 am
Forum: Hybridization
Topic: How to simply determine hybridization
Replies: 27
Views: 217

Re: How to simply determine hybridization

Count the number of bonds and think about the hybridization that allows for the same number of bonds will help determine!
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:12 am
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: pH Chart
Replies: 16
Views: 125

Re: pH Chart

I don't think we need to memorize the whole chart.
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:10 am
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: Water Properties
Replies: 5
Views: 129

Re: Water Properties

Amphoteric refers to molecules that are both acidic and basic, while amphiprotic molecules are which can both donate and receive H+ ions.
by Chenning Yang Dis3l
Sun Dec 06, 2020 11:07 am
Forum: Administrative Questions and Class Announcements
Topic: Chem 14A Final
Replies: 21
Views: 199

Re: Chem 14A Final

I believe he mentioned quantum unit would be distributed the most.
by Chenning Yang Dis3l
Sun Nov 29, 2020 9:03 pm
Forum: Hybridization
Topic: hybridization, but very simple
Replies: 9
Views: 54

Re: hybridization, but very simple

Just count groups of bonds and lone pairs will help determine that!
by Chenning Yang Dis3l
Sun Nov 29, 2020 9:02 pm
Forum: Hybridization
Topic: delocalized pi bonds
Replies: 15
Views: 82

Re: delocalized pi bonds

Thank you for the post!
by Chenning Yang Dis3l
Sun Nov 29, 2020 9:00 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: ions
Replies: 8
Views: 86

Re: ions

Thank you for the information! I was confused before reading this post either.
by Chenning Yang Dis3l
Sun Nov 29, 2020 8:59 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polar
Replies: 10
Views: 93

Re: Polar

The type of atoms in a molecule and its shape are factors that determine whether a molecule is polar or nonpolar.
by Chenning Yang Dis3l
Sun Nov 29, 2020 8:58 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Sapling #17
Replies: 10
Views: 107

Re: Sapling #17

None of the three structures are resonance structures of one another since they have different connectivities.
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:38 am
Forum: Administrative Questions and Class Announcements
Topic: Week 7 Sapling
Replies: 12
Views: 190

Re: Week 7 Sapling

We have a sapling assignment for week 7 and 8 that will be due Sunday of midnight week 8.
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:33 am
Forum: Ionic & Covalent Bonds
Topic: Polar/ Nonpolar
Replies: 23
Views: 180

Re: Polar/ Nonpolar

It might be also okay to use electronegativity calculation to determine if polar or nonpolar.
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:32 am
Forum: Lewis Acids & Bases
Topic: How do I calculate expanded valence electrons?
Replies: 3
Views: 46

How do I calculate expanded valence electrons?

I've got a question on Cl3- on midterm and I have no idea how to solve it.
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:29 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: shielding and penetrating
Replies: 5
Views: 92

Re: shielding and penetrating

Thank you for the information! It really helps!
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:22 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: What are orbitals?
Replies: 10
Views: 142

Re: What are orbitals?

An atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom.
by Chenning Yang Dis3l
Sun Nov 22, 2020 4:12 am
Forum: Wave Functions and s-, p-, d-, f- Orbitals
Topic: Effective Nuclear Charge
Replies: 3
Views: 63

Re: Effective Nuclear Charge

Because the shielding effect of negatively charged electrons prevents higher orbital electrons from experiencing the full nuclear charge.
by Chenning Yang Dis3l
Mon Nov 16, 2020 3:09 am
Forum: Lewis Structures
Topic: Lewis acids and bases
Replies: 23
Views: 130

Re: Lewis acids and bases

Acids accept e- while bases are those that donate e-! Drawing out the lewis structure helps!
by Chenning Yang Dis3l
Mon Nov 16, 2020 3:06 am
Forum: Ionic & Covalent Bonds
Topic: Hydrogen Bonding
Replies: 13
Views: 89

Re: Hydrogen Bonding

N, O and F are all small and highly electronegative, while hydrogen is suitable for strong covalent/hydrogen bond.
by Chenning Yang Dis3l
Mon Nov 16, 2020 3:04 am
Forum: Administrative Questions and Class Announcements
Topic: Nomenclature on Midterm
Replies: 5
Views: 51

Re: Nomenclature on Midterm

Thank you for the information!
by Chenning Yang Dis3l
Mon Nov 16, 2020 3:02 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Question
Replies: 12
Views: 151

Re: Midterm 2 Question

I believe he said in the latest email that we will only have zoom on our second device.
by Chenning Yang Dis3l
Mon Nov 16, 2020 3:01 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2
Replies: 23
Views: 139

Re: Midterm 2

It's still 56 minutes, with 5-10 mins for preparation.
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:43 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 1
Replies: 5
Views: 52

Re: Midterm 1

Thanks for the information!
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:42 am
Forum: Administrative Questions and Class Announcements
Topic: Second Midterm Date
Replies: 9
Views: 73

Re: Second Midterm Date

Thanks for the information!
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:39 am
Forum: Administrative Questions and Class Announcements
Topic: Acids & Bases in MT2?
Replies: 4
Views: 21

Re: Acids & Bases in MT2?

Thank you for sharing! I was wondering too.
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:37 am
Forum: Administrative Questions and Class Announcements
Topic: CHEM 14B Class Structure
Replies: 2
Views: 31

Re: CHEM 14B Class Structure

Hello! I heard it would be asynchronous. As long as we are adopting online education, I believe the lectures would be mostly recorded.
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:33 am
Forum: Administrative Questions and Class Announcements
Topic: MIDTERM 2 Textbook Sections
Replies: 6
Views: 40

Re: MIDTERM 2 Textbook Sections

I believe Professor will send out a handout indicating the textbook sections just like the one he sent before midterm 1.
by Chenning Yang Dis3l
Sun Nov 08, 2020 10:29 am
Forum: Administrative Questions and Class Announcements
Topic: Is CCLE Down?
Replies: 5
Views: 24

Re: Is CCLE Down?

Hi! Try to connect the UCLA vpn. It sometimes works for me!
by Chenning Yang Dis3l
Sat Oct 31, 2020 10:28 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Access Code
Replies: 5
Views: 62

Re: Sapling Access Code

Hi! Just keep e-mailing the store and they would send you the code!
by Chenning Yang Dis3l
Sat Oct 31, 2020 10:25 pm
Forum: Administrative Questions and Class Announcements
Topic: Audio-Visual Focus Topics
Replies: 14
Views: 103

Re: Audio-Visual Focus Topics

Thank you for this post! I was wondering too.
by Chenning Yang Dis3l
Sat Oct 31, 2020 10:24 pm
Forum: Administrative Questions and Class Announcements
Topic: Way to search posts for similarity?
Replies: 9
Views: 68

Re: Way to search posts for similarity?

Thank you for asking this question! I was wondering too.
by Chenning Yang Dis3l
Sat Oct 31, 2020 10:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Practice Exams
Replies: 8
Views: 105

Re: Practice Exams

I think going to those workshops and step-up sessions really help as they provide practice exercises!
by Chenning Yang Dis3l
Sat Oct 31, 2020 10:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm Scores
Replies: 4
Views: 64

Re: Midterm Scores

I think it would come out sometime early next week!
by Chenning Yang Dis3l
Sun Oct 25, 2020 11:23 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm calculator policy
Replies: 10
Views: 92

Re: Midterm calculator policy

I don't think there are any restrictions on the calculator, but I think a scientific calculator works best for a chem exam!
by Chenning Yang Dis3l
Sun Oct 25, 2020 11:20 pm
Forum: Administrative Questions and Class Announcements
Topic: Even Solutions to Textbook Questions
Replies: 3
Views: 35

Re: Even Solutions to Textbook Questions

I don't think there are solutions for even-numbered questions. But I believe you can definitely ask your TA for unsure questions!
by Chenning Yang Dis3l
Sun Oct 25, 2020 11:17 pm
Forum: Administrative Questions and Class Announcements
Topic: Trouble Accessing Textbook
Replies: 1
Views: 15

Re: Trouble Accessing Textbook

Hi there! I've encountered a similar problem. Try log out and log in again. Sometimes it is just a temporary error with the website.
by Chenning Yang Dis3l
Sun Oct 25, 2020 11:14 pm
Forum: Administrative Questions and Class Announcements
Topic: is an iPad compatible with respondus
Replies: 1
Views: 9

Re: is an iPad compatible with respondus

Hi there. I think as long as you have respondus and zoom with your iPad, it should work!
by Chenning Yang Dis3l
Fri Oct 23, 2020 1:45 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Review Workshops
Replies: 3
Views: 126

Re: Midterm Review Workshops

Hello, Dr. Lavelle has emphasized that there will not be much material on this upcoming midterm and there are 102 hours of assistance outside of lecture for students to prepare for the upcoming midterm. That being said, he does not see the need to have any midterm review sessions. However, please a...
by Chenning Yang Dis3l
Sun Oct 18, 2020 11:36 am
Forum: Administrative Questions and Class Announcements
Topic: Calculator?
Replies: 9
Views: 106

Re: Calculator?

Thank you for bring up this question! Haven't touched my Ti-84 after graduating from high school so I bet I need to review it ASAP.
by Chenning Yang Dis3l
Sun Oct 18, 2020 11:35 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Multiple Choice Format
Replies: 6
Views: 76

Re: Midterm Multiple Choice Format

I believe they would give more information on midterms this week! Everything goes so fast that I'm getting overwhelmed.
by Chenning Yang Dis3l
Sun Oct 18, 2020 11:28 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm Exam Format
Replies: 14
Views: 98

Re: Midterm Exam Format

I believe it would be fully MCQs.
by Chenning Yang Dis3l
Sun Oct 18, 2020 11:21 am
Forum: Administrative Questions and Class Announcements
Topic: wavelengths for light
Replies: 9
Views: 94

Re: wavelengths for light

I think the shortest wavelength and the longest one are more likely to be tested, so I'll definitely try to remember those two!
by Chenning Yang Dis3l
Sun Oct 18, 2020 11:13 am
Forum: Administrative Questions and Class Announcements
Topic: UCLA Store Updates on Ebook/Sapling access card
Replies: 16
Views: 153

Re: UCLA Store Updates on Ebook/Sapling access card

Hi! I believe you can email them to send you the sapling code. I did so as I am currently in another country. Just send them (textonline@asucla.ucla.edu) your order number and ask for the code. They replied pretty soon. Hope this helps!
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:48 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm(s?)
Replies: 6
Views: 58

Re: Midterm(s?)

Halle Villalobos 3C wrote:Hi! You also should've recently received an email from your TA with a download link to the program Respondus which is a locked browser we will use for quizzes and midterms.

Hi! I enrolled in the class on last Thursday and I didn't see that email. When's the email sent? Thank you!
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:45 am
Forum: Administrative Questions and Class Announcements
Topic: Homework Due Time
Replies: 8
Views: 51

Re: Homework Due Time

Hi I'm pretty sure assignments are both due on Sunday midnight pst. Be careful with time zone calculations if you are in certain situations...
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:31 am
Forum: Administrative Questions and Class Announcements
Topic: Homework
Replies: 6
Views: 52

Re: Homework

Hi! I believe sapling is our only weekly assignment, but you can practice for your benefits for sure!!
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:28 am
Forum: Administrative Questions and Class Announcements
Topic: Drop some helpful Youtube lessons!
Replies: 2
Views: 18

Drop some helpful Youtube lessons!

Hi guys. It's been a long time since I last studied chemistry so I found I've forgotten some basic concepts. Please drop some concise and helpful Youtube lessons if you have watched any! Thank you!!
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:25 am
Forum: Administrative Questions and Class Announcements
Topic: Periodic Table
Replies: 2
Views: 30

Re: Periodic Table

Personally I would keep decimal places for calculation, and then round the calculated result in the end, but I believe for common elements like H, C, O, keeping 1, 12, 16 is fine.
by Chenning Yang Dis3l
Sun Oct 11, 2020 9:18 am
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: Calculating number of moles of an element
Replies: 10
Views: 85

Re: Calculating number of moles of an element

I think 100g works the best for most cases since it makes the numbers much simpler.

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