Search found 65 matches

by Hannah Chang 3K
Sun Jan 24, 2021 10:35 pm
Forum: Applying Le Chatelier's Principle to Changes in Chemical & Physical Conditions
Topic: Qudratic Formula
Replies: 19
Views: 77

Re: Qudratic Formula

most scientific calculators have embedded program to solve quadratic formula, you could try to practice using it
by Hannah Chang 3K
Sun Jan 24, 2021 10:32 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: Strong Acids/Bases
Replies: 12
Views: 35

Re: Strong Acids/Bases

Those mnemonics are so cool
by Hannah Chang 3K
Sun Jan 24, 2021 9:40 pm
Forum: Administrative Questions and Class Announcements
Topic: Audio-Visual Focus-Topics, Assessments & Surveys
Replies: 6
Views: 19

Re: Audio-Visual Focus-Topics, Assessments & Surveys

Some of the content kind of overlap with those mentioned in the lectures.
by Hannah Chang 3K
Sun Jan 24, 2021 8:46 pm
Forum: Student Social/Study Group
Topic: Favorite Music
Replies: 57
Views: 130

Re: Favorite Music

I like many kinds of music and don't really have a favorite. I listen to different kinds of music for different occasions, like classical music for studying and indie rock for workout
by Hannah Chang 3K
Sun Jan 17, 2021 9:45 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: how to get molarity
Replies: 8
Views: 20

Re: how to get molarity

it seems like the molarity is already given in this question. molarity is defined as moles of solute per liter of solution
by Hannah Chang 3K
Sun Jan 17, 2021 9:42 pm
Forum: Student Social/Study Group
Topic: Chemistry Community Posts
Replies: 22
Views: 54

Re: Chemistry Community Posts

my TA last quarter updated the points after each exam and it seems like the "total number" of posts is the key factor.
by Hannah Chang 3K
Sun Jan 17, 2021 9:39 pm
Forum: Student Social/Study Group
Topic: Study Strategies
Replies: 31
Views: 51

Re: Study Strategies

Reading textbook is more helpful than I originally thought
by Hannah Chang 3K
Sun Jan 17, 2021 9:33 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem Community and Sapling Grades
Replies: 25
Views: 66

Re: Chem Community and Sapling Grades

I think last quarter my chemistry community grades are posted after each exam so it probably depends on your TA
by Hannah Chang 3K
Sun Jan 17, 2021 9:32 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterms
Replies: 24
Views: 58

Re: Midterms

There are three lectures so the midterm would probably be 11am/1pm/3pm depending on which lecture you're enrolled in.
by Hannah Chang 3K
Sun Jan 10, 2021 8:12 pm
Forum: Administrative Questions and Class Announcements
Topic: Week 1 Assignment
Replies: 17
Views: 79

Re: Week 1 Assignment

Sapling homework with links posted on CCLE is mandatory, and they have specific deadlines. The grading is based on completion, not accuracy.
The practice problems listed in the syllabus under each topic are not mandatory.
by Hannah Chang 3K
Thu Jan 07, 2021 9:40 pm
Forum: Equilibrium Constants & Calculating Concentrations
Topic: dobule arrows
Replies: 6
Views: 52

Re: dobule arrows

"<<" ---->much less than
by Hannah Chang 3K
Thu Jan 07, 2021 9:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7184

Re: Accessing the E-textbook [ENDORSED]

I purchased the sapling+ 7th edition ebook a few days ago from ucla and have not received a notification for the prepaid code to access sapling. Does anybody have a solution or are in a similar situation? Thanks. Hi, I had the exact same problem, because I did not previously take 14A with Lavelle. ...
by Hannah Chang 3K
Thu Jan 07, 2021 9:22 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7184

Re: Accessing the E-textbook [ENDORSED]

When you re-purchased, did you receive a code on email or were you able to access it right away? I still for some reason unable to get into sapling. At first, I tried to use the access code I got last quarter, but it said it's already used. So I chose the other option; which is something like "...
by Hannah Chang 3K
Thu Jan 07, 2021 9:04 pm
Forum: Administrative Questions and Class Announcements
Topic: Accessing the E-textbook [ENDORSED]
Replies: 106
Views: 7184

Re: Accessing the E-textbook [ENDORSED]

Are there solutions posted anywhere for the extra practice textbook problems (not the Sapling questions)? Go to sapling learning site for this class -> Resources -> Atkins 7e SSM (a.k.a. student solution manual). This student solution manual includes answers for odd-number textbook questions, not s...
by Hannah Chang 3K
Tue Dec 15, 2020 1:24 pm
Forum: Quantum Numbers and The H-Atom
Topic: n=6,l=5
Replies: 6
Views: 81

Re: n=6,l=5

l=5 is theoretically correct though we haven't found actual elements with h orbitals.
by Hannah Chang 3K
Tue Dec 15, 2020 1:20 pm
Forum: Calculating the pH of Salt Solutions
Topic: Solving PH/PoH
Replies: 11
Views: 86

Re: Solving PH/PoH

I pretty much just memorized the formulas and did lots of practice problems.
by Hannah Chang 3K
Tue Dec 15, 2020 1:18 pm
Forum: Student Social/Study Group
Topic: Curve
Replies: 29
Views: 206

Re: Curve

The average of this class still falls within c+/b- range so probably no curve will be applied.
by Hannah Chang 3K
Tue Dec 15, 2020 1:16 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Exam Scores
Replies: 13
Views: 157

Re: Final Exam Scores

Hope we could also see what we did right or wrong.
by Hannah Chang 3K
Fri Dec 11, 2020 12:13 pm
Forum: Administrative Questions and Class Announcements
Topic: Final Content
Replies: 18
Views: 166

Re: Final Content

Yeah, it will be cumulative and there will be 30 questions each worth 6 points (180 points total) and we have a total of 95 minutes.
by Hannah Chang 3K
Sun Dec 06, 2020 6:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Sapling week 9 question 3
Replies: 4
Views: 29

Re: Sapling week 9 question 3

Seesaw should have 4 bonds but 5 regions of electron density.
by Hannah Chang 3K
Sat Dec 05, 2020 6:11 pm
Forum: Properties & Structures of Inorganic & Organic Acids
Topic: pH Chart
Replies: 16
Views: 112

Re: pH Chart

probably not necessary to remember the exact value but knowing the relative pH order of different compound is quite important
by Hannah Chang 3K
Sat Dec 05, 2020 6:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Chem 14A Final
Replies: 21
Views: 186

Re: Chem 14A Final

Matlynn Giles 1A wrote:Dr. Lavelle may have said this but are there partial credit questions on the exam?


I didn't recall him mention this yet
by Hannah Chang 3K
Sat Dec 05, 2020 6:07 pm
Forum: Administrative Questions and Class Announcements
Topic: Final
Replies: 21
Views: 136

Re: Final

There haven't been more instructions so I would expect it to be the same as the previous two exams
by Hannah Chang 3K
Sat Dec 05, 2020 6:05 pm
Forum: Student Social/Study Group
Topic: Calculating grade
Replies: 24
Views: 252

Re: Calculating grade

Cooper_Geralds_2E wrote:If we complete the sapling assignments by the due dates are we guaranteed the full 50 points for that portion of our grades?


yeah I think so. when you finished the assignment sapling would also give a percentage completion score
by Hannah Chang 3K
Sun Nov 29, 2020 7:41 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Ligands
Replies: 5
Views: 25

Re: Ligands

All ligands are Lewis bases but not all Lewis bases are ligands
by Hannah Chang 3K
Sun Nov 29, 2020 7:33 pm
Forum: Student Social/Study Group
Topic: Professor Lavelle's hat
Replies: 17
Views: 220

Re: Professor Lavelle's hat

I didn't even realize there are words on it until I saw this post.
by Hannah Chang 3K
Sun Nov 29, 2020 7:17 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: non polar bonds/polar molecules
Replies: 6
Views: 20

Re: non polar bonds/polar molecules

Molecules having only nonpolar bonds cannot be polar.
by Hannah Chang 3K
Sun Nov 29, 2020 7:09 pm
Forum: Student Social/Study Group
Topic: Curve?
Replies: 50
Views: 1941

Re: Curve?

does anyone know if the class average has negatively affected grades? For example, is it possible to be passing the class as of now, but fail it in the end due to a high class average? the averages for the past two midterms are ~80% which still falls in the B- range of a standard grading curve, so ...
by Hannah Chang 3K
Tue Nov 24, 2020 5:30 pm
Forum: Administrative Questions and Class Announcements
Topic: Midterm 2 Results
Replies: 10
Views: 125

Re: Midterm 2 Results

Is there a way to view the distribution and average score of the class?
by Hannah Chang 3K
Sun Nov 22, 2020 9:33 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Polarity from Lewis Structures
Replies: 6
Views: 28

Re: Polarity from Lewis Structures

since we're able to know the shape of the molecule by looking at the lewis structure it's possible to infer the polarity. But ultimately, numerical values of electronegativity would provide the most precise information regarding polarity
by Hannah Chang 3K
Sun Nov 22, 2020 9:26 pm
Forum: Administrative Questions and Class Announcements
Topic: Extra Credit
Replies: 11
Views: 110

Re: Extra Credit

It's not mentioned in the syllabus so I guess not
by Hannah Chang 3K
Sun Nov 22, 2020 4:25 pm
Forum: Formal Charge and Oxidation Numbers
Topic: Best Formal Charge Equations
Replies: 24
Views: 133

Re: Best Formal Charge Equations

I use the equation the same way Dr. Lavelle uses during the lecture. FC=V-(shared/2+L)
by Hannah Chang 3K
Sun Nov 22, 2020 4:19 pm
Forum: Student Social/Study Group
Topic: grade worries
Replies: 110
Views: 1174

Re: grade worries

I feel like the second midterm is more difficult than the first one. I wasn't really worried about the first exam since I'm cool with calculation questions. I feel like the second midterm is more memorization oriented and I couldn't really find an efficient way to master it.
by Hannah Chang 3K
Sun Nov 22, 2020 4:14 pm
Forum: Administrative Questions and Class Announcements
Topic: Problem of viewing the lecture
Replies: 9
Views: 63

Re: Problem of viewing the lecture

I don't have problem viewing it, if it is due to VPN issue you could check the library website to figure out how to connect to UCLA network from home.
by Hannah Chang 3K
Sun Nov 15, 2020 8:13 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures on Midterm
Replies: 31
Views: 162

Re: Drawing Lewis Structures on Midterm

I don't think we will be asked to draw lewis structures since it would be multiple choice questions, perhaps we will be asked to select from pictures that have the correct configuration.
by Hannah Chang 3K
Sun Nov 15, 2020 8:10 pm
Forum: Lewis Structures
Topic: Lewis acids and Bases
Replies: 20
Views: 119

Re: Lewis acids and Bases

Lewis acids are electron acceptor; lewis bases are electron donor
by Hannah Chang 3K
Sun Nov 15, 2020 8:08 pm
Forum: Administrative Questions and Class Announcements
Topic: Electronegativity chart for Midterm
Replies: 7
Views: 68

Re: Electronegativity chart for Midterm

I don't recall being told to print out more stuff for the exam except for the equation and periodic table we used last time.
by Hannah Chang 3K
Sun Nov 15, 2020 5:04 pm
Forum: Ionic & Covalent Bonds
Topic: Homework due date
Replies: 49
Views: 339

Re: Homework due date

Week 5/6 HW is due tonight 11/15 11:59pm PST.
by Hannah Chang 3K
Sun Nov 15, 2020 5:02 pm
Forum: Administrative Questions and Class Announcements
Topic: midterm 2 lecture content
Replies: 4
Views: 29

Re: midterm 2 lecture content

lecture #10 ~ leture #18?
by Hannah Chang 3K
Sun Nov 15, 2020 4:55 pm
Forum: Administrative Questions and Class Announcements
Topic: Nomenclature on Midterm
Replies: 5
Views: 49

Re: Nomenclature on Midterm

From what I've heard I think we will always be given the chemical formula
by Hannah Chang 3K
Mon Nov 09, 2020 8:23 am
Forum: Student Social/Study Group
Topic: Post Midterm Blues
Replies: 71
Views: 613

Re: Post Midterm Blues

Redirect yourself and keep on working hard.
by Hannah Chang 3K
Mon Nov 09, 2020 8:21 am
Forum: Student Social/Study Group
Topic: Mid-quarter Check in
Replies: 67
Views: 283

Re: Mid-quarter Check in

I think the arrangement of this class is very suitable for an online format and can even be a self-guided class.
by Hannah Chang 3K
Mon Nov 09, 2020 8:19 am
Forum: Student Social/Study Group
Topic: Studying From Home
Replies: 91
Views: 496

Re: Studying From Home

Might be helpful to set up a studying space at home. You could try rearrange furnitures and create a space that you are not usually used to.
by Hannah Chang 3K
Mon Nov 09, 2020 8:17 am
Forum: Administrative Questions and Class Announcements
Topic: Midterm 1 answer key
Replies: 13
Views: 103

Re: Midterm 1 answer key

Does anyone remember if every single question in the midterm were either from the textbook or HW?
by Hannah Chang 3K
Thu Nov 05, 2020 1:20 pm
Forum: General Science Questions
Topic: Midterm Grades
Replies: 30
Views: 344

Re: Midterm Grades

The grades are already available on CCLE
by Hannah Chang 3K
Wed Nov 04, 2020 10:04 pm
Forum: Student Social/Study Group
Topic: How are you studying?
Replies: 203
Views: 1296

Re: How are you studying?

I found it helpful to review HW questions before the exam even if I got them right while doing them.
by Hannah Chang 3K
Wed Nov 04, 2020 9:37 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Textbook Problem 1E.5
Replies: 2
Views: 21

Re: Textbook Problem 1E.5

If the principal quantum number ( n ) is the same, electrons located in p orbitals are going to be located closer to the nucleus and thus having a bigger shielding effect.
by Hannah Chang 3K
Wed Nov 04, 2020 9:20 pm
Forum: Ionic & Covalent Bonds
Topic: Ions
Replies: 5
Views: 51

Re: Ions

electrons are removed from the high energy orbital first.
by Hannah Chang 3K
Wed Nov 04, 2020 8:52 pm
Forum: Quantum Numbers and The H-Atom
Topic: Are there subshells past f?
Replies: 28
Views: 166

Re: Are there subshells past f?

It seems like "j" is being skipped because some languages don't differentiate between the letters "i" and "j".
by Hannah Chang 3K
Wed Nov 04, 2020 7:24 pm
Forum: Student Social/Study Group
Topic: Textbook vs Lectures vs Other Methods
Replies: 17
Views: 132

Re: Textbook vs Lectures vs Other Methods

I watched the lectures and make notes first, then jump into the homework; if I don't understand something, I use hints and search on the chemistry community or just the Internet. And finally, go to the textbook.
by Hannah Chang 3K
Wed Nov 04, 2020 6:41 pm
Forum: Student Social/Study Group
Topic: How many points for an A and above?
Replies: 10
Views: 139

Re: How many points for an A and above?

I would assume an A is the standard 90%, which is 450 points. If you're asking about a 4.0 (A and A+), that's usually cut off at 93% or 465 points. Does anyone know why our class uses this grading system? It seems like it works the same way as the 0-100 system but at a larger scale of points. Don't...
by Hannah Chang 3K
Wed Nov 04, 2020 6:12 pm
Forum: Student Social/Study Group
Topic: Favorite TV shows
Replies: 178
Views: 893

Re: Favorite TV shows

though I'm not really good at cooking I love MasterChef.
by Hannah Chang 3K
Mon Nov 02, 2020 6:05 pm
Forum: SI Units, Unit Conversions
Topic: Using a Calculator
Replies: 10
Views: 86

Re: Using a Calculator

Upon reading the comments, I took out the instruction manual of my scientific calculator and realized it has forty built-in scientific constants and does SI conversion.....and there I was, typing stuffs wrong.
by Hannah Chang 3K
Mon Nov 02, 2020 5:41 pm
Forum: Properties of Light
Topic: Wavelenght
Replies: 17
Views: 111

Re: Wavelenght

I think it's quite important to look at the electromagnetic spectrum and memorize how they compare to each other.
by Hannah Chang 3K
Fri Oct 30, 2020 11:41 pm
Forum: Administrative Questions and Class Announcements
Topic: Sapling Access Code
Replies: 5
Views: 62

Re: Sapling Access Code

I forwarded my electronic receipt and asked them to email me the code directly and I got it within two business days.
textonline@asucla.ucla.edu
by Hannah Chang 3K
Fri Oct 30, 2020 10:18 pm
Forum: Photoelectric Effect
Topic: Sapling using de broglie's
Replies: 7
Views: 78

Re: Sapling using de broglie's

Did you remember to convert the mass from g to kg?
by Hannah Chang 3K
Wed Oct 28, 2020 7:59 pm
Forum: Administrative Questions and Class Announcements
Topic: how far in the sapling hw does midterm 1 go to
Replies: 5
Views: 71

Re: how far in the sapling hw does midterm 1 go to

It seems like randomization has been disabled so midterm 1 covers up to Q19.
by Hannah Chang 3K
Sun Oct 25, 2020 11:43 pm
Forum: Administrative Questions and Class Announcements
Topic: Constants, Equations, and Periodic Table
Replies: 3
Views: 40

Re: Constants, Equations, and Periodic Table

He didn't mention the one on Amazon in his recent class email, but he did say we need to print out "constants and equation" and "periodic table" on his website
by Hannah Chang 3K
Sun Oct 25, 2020 11:37 pm
Forum: Student Social/Study Group
Topic: Midterm Materials
Replies: 2
Views: 20

Re: Midterm Materials

We need to print out these two pages before the exam and a scientific calculator
https://lavelle.chem.ucla.edu/wp-conten ... ations.pdf
https://lavelle.chem.ucla.edu/wp-conten ... _IUPAC.pdf
by Hannah Chang 3K
Sun Oct 25, 2020 11:11 pm
Forum: *Liquid Structure (Viscosity, Surface Tension, Liquid Crystals, Ionic Liquids)
Topic: determining viscosity
Replies: 11
Views: 100

Re: determining viscosity

There are different types of viscometers that measure viscosity. You would need to know the flow rate, shear stress, density.....etc in order to calculate.
by Hannah Chang 3K
Sun Oct 25, 2020 10:51 pm
Forum: Limiting Reactant Calculations
Topic: Excess reactant affecting limiting reactant
Replies: 7
Views: 78

Re: Excess reactant affecting limiting reactant

No, there will always be at least one limiting reactant in a chemical reaction. If there's no limiting reactant, then it means there's an infinite quantity of reactants, and the reaction would run forever. In a reaction with two reactants, either they are both used up simultaneously, or one is a lim...
by Hannah Chang 3K
Sun Oct 25, 2020 10:36 pm
Forum: Properties of Electrons
Topic: Destructive Interference
Replies: 1
Views: 28

Re: Destructive Interference

In order for destructive interference to occur, the two waves need to have displacements in the opposite direction (e.g. the troughs of one coincide with the peaks of the other.). If they have the same magnitude/amplitude, freq, energy then they will cancel each other out completely. But destructive...
by Hannah Chang 3K
Sun Oct 25, 2020 10:00 pm
Forum: Molarity, Solutions, Dilutions
Topic: Molarity Question
Replies: 3
Views: 47

Re: Molarity Question

Yes, given that solutions are homogeneous mixtures, solutes should be evenly distributed in the solution.

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