CHEMISTRY COMMUNITY

Hannah Chang 3K

If I remember correctly from last quarter, final exam result and class letter grade were released at the same time roughly one week after the exam.

Hannah Chang 3K

Dr. Lavelle, thank you for organizing so many resources for the course and explain concepts step by step, I'm actually enjoying and appreciate chemistry more than I used to in high school.

Hannah Chang 3K

I'm already looking forward to getting that hour back in Nov.........

Hannah Chang 3K

use the one with units that align with the information given in the question

Hannah Chang 3K

Lillian wrote:I go by the whole, "If you can do something about it, don't worry. If you can't do something about it, don't worry." Kind of helps with the whole anxiety surrounding something like this.

Nice one. I'm gonna try practicing this mindset.

Hannah Chang 3K

handwriting on my iPad works well for me to organize everything. I always copy down Dr. Lavelle's slides and also added some quotes.

Hannah Chang 3K

no curve but there's gonna be two bonus questions, hopefully, that could help a bit.

Hannah Chang 3K

it was mentioned in lecture 10 but if you want more detailed information textbook would be better

Hannah Chang 3K

I miss the library and tennis court

Hannah Chang 3K

from my experience last quarter, I think it's pretty important to review the materials from the previous exams.

Hannah Chang 3K

Dr. Lavelle's review session is helpful and he's probably gonna explain some midterm questions.

Hannah Chang 3K

you plugged in the wrong concentration for Cr2+

Hannah Chang 3K

it's always good to post especially when doing homework

Hannah Chang 3K

You could also refer to appendix 2B in the textbook

Hannah Chang 3K

Jenny Chau 1I wrote:If homework is not completed before the due date, does that mean what you completed are the points you get? Or are you able to still get full points even if you finish the homework a bit late?

I think you will probably just get what you have completed at that point

Hannah Chang 3K

Are there ways to see the distribution?

Hannah Chang 3K

Are there ways to see the distribution?

Hannah Chang 3K

it could be used to calculate the ion potential difference across cell membrane so we know which way the ions would flow and whether it would be possible to trigger an action potential.

Hannah Chang 3K

I heard people getting simple room divider to create a focus space in the room

Hannah Chang 3K

based on reviews on Bruinwalk he seldom curve anything

Hannah Chang 3K

Is there a way to find answers to even-number questions?

Hannah Chang 3K

ions are charged so they would be attracted to stuff with opposite charge. The bridge completes the electrical circuit between to half cells without mixing the solutions

Hannah Chang 3K

Final is cumulative and contributes to 35% of the total grade and it's gonna be 90 minutes

Hannah Chang 3K

the entropy of the system will increase when the amount of motion within the system increases therefore S gas>S liquid> S solid. So solid to liquid will have positive changes in entropy, and liquid to solid will have negative changes in entropy

Hannah Chang 3K

this seems to be #9 for Saplinfg week 5/6, not week 3/4

Hannah Chang 3K

it seems like the points for the chem community are updated every few weeks so we just have to wait

Hannah Chang 3K

it's on the equation sheet but over time you just remember it

Hannah Chang 3K

the sign changes for the reverse reaction, and if the resulting delta G less than zero it is spontaneous

Hannah Chang 3K

FionaHunter21 wrote:Do we not have to subtract the cooling it back down since the entropy already comes out to a negative number?

add that negative number(S3) directly to the calculation, so the answer (S1+S2+S3) would be smaller than (S1+S2), hope this answers your question

Hannah Chang 3K

the entropy of the system will increase when the amount of motion within the system increases therefore S gas>S liquid> S solid. So solid to liquid will have positive changes in entropy, and liquid to solid will have negative changes in entropy

Hannah Chang 3K

besides doing all those practice questions, I found it helpful to close my eyes and organize my thoughts and pretend to teach someone the materials; if I can articulate all the dots that ease my stress cause I know I actually understand the concepts in addition to knowing how to plug in the numbers ...

Hannah Chang 3K

"Assume that the constant‑pressure molar specific heat for SO2(g), which consists of nonlinear molecules, is equal to 4R, where R=8.3145 J/(mol·K) is the ideal gas constant."
4R=4*8.3145=33.258J/(mol .K)

Hannah Chang 3K

This is so helpful, thank you so much! :) I've personally struggled with when to do the textbook problems because they are a good method to check your understanding as we go through the material, but it also seems smart to do all of them closer to the exam. That being said, it's difficult to find t...

Hannah Chang 3K

Kaleb Tuliau 3E wrote:I honestly feel the same way, I studied for a week and did terrible. Should I consider dropping?

it would be a good idea to estimate the final grade by using the standard grade curve first. P/F is also an option

Hannah Chang 3K

we could attend any of the TA office hours all the links are posted on the class website

Hannah Chang 3K

Youtube, Netflix, exercise

Hannah Chang 3K

maybe you could take screenshots before doing them

Hannah Chang 3K

I feel like the sapling homework includes more basic questions and are easier than the textbook problems. And the exams are like the mix of the two

Hannah Chang 3K

For endothermic reactions, the energy required to break the reactant bonds is higher than the energy released during the formation of product bonds (strong reactant bonds, weak product bonds). Exothermic reactions would be the opposite

Hannah Chang 3K

I personally found the test to be a little more difficult than I had anticipated. I was able to do all the problems from workshops and the homework; however, the midterm's problems seemed a little harder. Maybe I was just nervous. Can anyone else relate? Me , too. Harder than what I expected but fi...

Hannah Chang 3K

it would probably take a week (or longer)

Hannah Chang 3K

most scientific calculators have embedded program to solve quadratic formula, you could try to practice using it

Hannah Chang 3K

Those mnemonics are so cool

Hannah Chang 3K

Some of the content kind of overlap with those mentioned in the lectures.

Hannah Chang 3K

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

Hannah Chang 3K

it seems like the molarity is already given in this question. molarity is defined as moles of solute per liter of solution

Hannah Chang 3K

my TA last quarter updated the points after each exam and it seems like the "total number" of posts is the key factor.

Hannah Chang 3K

Reading textbook is more helpful than I originally thought

Hannah Chang 3K

I think last quarter my chemistry community grades are posted after each exam so it probably depends on your TA

Hannah Chang 3K

There are three lectures so the midterm would probably be 11am/1pm/3pm depending on which lecture you're enrolled in.

Hannah Chang 3K

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.

Hannah Chang 3K

"<<" ---->much less than

Hannah Chang 3K

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. ...

Hannah Chang 3K

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 "...

Hannah Chang 3K

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...

Hannah Chang 3K

l=5 is theoretically correct though we haven't found actual elements with h orbitals.

Hannah Chang 3K

I pretty much just memorized the formulas and did lots of practice problems.

Hannah Chang 3K

The average of this class still falls within c+/b- range so probably no curve will be applied.

Hannah Chang 3K

Hope we could also see what we did right or wrong.

Hannah Chang 3K

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.

Hannah Chang 3K

Seesaw should have 4 bonds but 5 regions of electron density.

Hannah Chang 3K

probably not necessary to remember the exact value but knowing the relative pH order of different compound is quite important

Hannah Chang 3K

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

Hannah Chang 3K

There haven't been more instructions so I would expect it to be the same as the previous two exams

Hannah Chang 3K

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

Hannah Chang 3K

All ligands are Lewis bases but not all Lewis bases are ligands

Hannah Chang 3K

I didn't even realize there are words on it until I saw this post.

Hannah Chang 3K

https://lavelle.chem.ucla.edu/wp-conten ... hedule.pdf
Final exam should be 12/13 for everyone.

Hannah Chang 3K

Molecules having only nonpolar bonds cannot be polar.

Hannah Chang 3K

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 ...

Hannah Chang 3K

Is there a way to view the distribution and average score of the class?

Hannah Chang 3K

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

Hannah Chang 3K

It's not mentioned in the syllabus so I guess not

Hannah Chang 3K

I use the equation the same way Dr. Lavelle uses during the lecture. FC=V-(shared/2+L)

Hannah Chang 3K

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.

Hannah Chang 3K

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.

Hannah Chang 3K

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.

Hannah Chang 3K

Lewis acids are electron acceptor; lewis bases are electron donor

Hannah Chang 3K

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.

Hannah Chang 3K · Re: Homework due date Week 5/6 HW is due tonight 11/15 11:59pm PST.

Week 5/6 HW is due tonight 11/15 11:59pm PST.

Hannah Chang 3K

lecture #10 ~ leture #18?

Hannah Chang 3K

From what I've heard I think we will always be given the chemical formula

Hannah Chang 3K

Redirect yourself and keep on working hard.

Hannah Chang 3K

I think the arrangement of this class is very suitable for an online format and can even be a self-guided class.

Hannah Chang 3K

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.

Hannah Chang 3K

Does anyone remember if every single question in the midterm were either from the textbook or HW?

Hannah Chang 3K

The grades are already available on CCLE

Hannah Chang 3K

I found it helpful to review HW questions before the exam even if I got them right while doing them.

Hannah Chang 3K

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.

Hannah Chang 3K

electrons are removed from the high energy orbital first.

Hannah Chang 3K

It seems like "j" is being skipped because some languages don't differentiate between the letters "i" and "j".

Hannah Chang 3K

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.

Hannah Chang 3K

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...

Hannah Chang 3K

though I'm not really good at cooking I love MasterChef.

Hannah Chang 3K

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.

Hannah Chang 3K

I think it's quite important to look at the electromagnetic spectrum and memorize how they compare to each other.

Hannah Chang 3K

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

Hannah Chang 3K

Sunday nights.

Hannah Chang 3K

Did you remember to convert the mass from g to kg?

Hannah Chang 3K

It seems like randomization has been disabled so midterm 1 covers up to Q19.

Search found 106 matches