CHEMISTRY COMMUNITY

Giselle_zamora_1L

Yes print the new one just in case !

Giselle_zamora_1L

I use an ipad, I feel like it gives me the best of both worlds but for practice problems I use gold ole fashion paper I don't know why but I like it

Giselle_zamora_1L

It honeslty depends on the professor, lavelle take everyone but Im not too sure about every other chem teacher !

Giselle_zamora_1L

as of right now its Driver License ! so good !

Giselle_zamora_1L

I usually dont reduce nervousness, but just breathe and remember that no matter what, its all over in a couple of hours

Giselle_zamora_1L

I'm pre med and Im stressing out too because of med school. Covid has been particularly hard on me as well and overall I don't fee motivated , but push through and try to explain in your personal statements!

Giselle_zamora_1L

Top three of all time for me are Criminal Minds (i have seen all episodes of all 15 season at least 4 times by now) , friends (very binagable as well) and Lucifer !

Giselle_zamora_1L

Daylight will automatically update on your phone so just set it for regular time

Giselle_zamora_1L

Depends on what you like, if you like books that are simple but lifechanging and make you think I recommend the Garden of Eden, its soo good !

Giselle_zamora_1L

i didnt relize until I was waking up early for some last min studying

Giselle_zamora_1L

Im gonna be a junior next year and i haven't been able to be a part of an organization :(

Giselle_zamora_1L

Im taking physics 5A over the summer

Giselle_zamora_1L

I love love love equlibium.

Giselle_zamora_1L

The most important thing is ti get in the worry about section since that's an easy fix. Depending on where in the waitlist you are you should be able to get in.

Giselle_zamora_1L

I'm taking 14BL and C in the summer

Giselle_zamora_1L

I"m so sorry to hear that. While I'm not in the same position as you, I can guarantee that most are feeling the same way. Ive lost all motivation which suck because as a premed student I can't let my grades slip.

Giselle_zamora_1L

He doesn't curve if the average is high. I don't understand how that's happening in chem but maybe that's just because I suck at chem

Giselle_zamora_1L

Dorming sounds so good! Ive lost all motivation to do anything in my bed

Giselle_zamora_1L

10/10 recommend learning how to solve them. Its so much easier because they fluctuate in reactions

Giselle_zamora_1L

How do you know that the changes in carbon, that's where I'm stuck. Is it something you just know/memorize?

Giselle_zamora_1L

Textbook problems are my go to !

Giselle_zamora_1L

Also if you can, take it during the summer. The professor listed has really good reviews. I don't know if its still open but you can try to see

Giselle_zamora_1L

Thank you so much for organizing! The only online class that has tried to make interaction as close to as normal as possible !

Giselle_zamora_1L

I really enjoyed talking about chemical equilibrium, not necessarily the most fun topic but because during 14A I was so lost so starting 14B I put in extra work in order to understand and I did! Made me so excited to actually study chemistry

Giselle_zamora_1L

A state property doesn't depend on the path taken. For example the distance between your house and UCLA. The distance does not change since its fixed but I'm sure you can take shortcuts it longer ways that can increase or decrease the actual miles it takes you to reach UCLA. In the same way temperat...

Giselle_zamora_1L

In isolated systems energy and matter are not exchanged so internal energy does not change. So its not affected by those things. For example a closed thermal flask with hot water, the water can leave or come in nor can it heat up or cool down even if you leave it in the sun (provided its good qualit...

Giselle_zamora_1L

No, he doesn't, I believe he teaches some upper-division chem classes if you're interested

Giselle_zamora_1L

I remember feeling really happy after the exam and then thinking maybe I found it easy because I did so badly. I recommend relaxing, it's normal to feel anxious. Next, if you have time, take a nap, sleep, watch a movie or do anything that relaxes you! However, in the weeks between getting results I ...

Giselle_zamora_1L

You can't review it on your own but if you go to your TA's office hours they should let you review it. Also, I think you can also go to other TA's but double-check that

Giselle_zamora_1L

Yes they do !

Giselle_zamora_1L

Hey, I also found 14A really really difficult. I barely passed even though I felt strongly in most of the topics. However, what I discovered too late were the textbook problems. I thought that the sampling homework was enough to review but nope. Do the self-help problems and the textbook problems an...

Giselle_zamora_1L

I cannot stress this enough, TEXTBOOK TEXTBOOK TEXTBOOK. Like just taking time to read it, doing the self-help problems and the assigned problems in the syllabus does wonders. He takes a lot of his problems from the textbook. If you can attend step-up sessions and UAs do that but textbook problems f...

Giselle_zamora_1L

so happy about that as well ! Did nothing but sleep all weekend, week is 8 is here so now time to start preparing for that final :(

Giselle_zamora_1L

I think it depends on the TA, for example I know that some TA's send out emails to their discussions canceling them but others don't, its all relative

Giselle_zamora_1L

I know this was posted a few years ago but if anyone sees this today if the problem says the temperature rose by 3.57 why did the person who answered write 3.65? Was it a typo it is there a reason because they got the right answer so I was really wondering since I was off by 0.04.

Giselle_zamora_1L

Just wait it out, lavelle updates them in intervals so don't worry

Giselle_zamora_1L

for 14A they didn't update them until after the final so you're probably good, just make sure to post on time !

Giselle_zamora_1L

Where can I find UA worksheets if I can't make it ?

Giselle_zamora_1L

I know the person who answered it did it years ago but if you're like me and still reading then I think she messed up on her decimals in one part that I think kinda messed the rest of the following answers, she wrote .0133 instead of 0.133 and she went back to it later but to any future Lavelle stud...

Giselle_zamora_1L

During lecture 6 Prof Lavelle is going over calculating salt pH concentrations and is explaining how Ka = Kw/ Kb. In the problem, it equals to 10^-14/ 1.8 x 10^5. I was putting this into my calculator and I got 5.6 x 10^20 and he got 5.6 x 10^10. Is there a specific way I should be putting this into...

Giselle_zamora_1L

if you look at one of the early emails that Lavelle sent out he gives an overview of the class and lets you know to log into the class websites. He has the password and it's on one of the earliest lines. I think it's just to make sure only students can access it but if that's not working then maybe ...

Giselle_zamora_1L

I convert it to moles in the beginning but i think that would only be for Kc because since K is unitless when calculating Kp (pressure) i don't think it matter if you do bar or atm

Giselle_zamora_1L

I know that for some people they said chem community post got updated every week for them but I think it depends on your TA, my TA for Chem 14A didn't update my chem community post grades until after we took finals so don't freak out if they're not there yet. As long as you post your 5 a week posts ...

Giselle_zamora_1L

you have an unlimited number of attempts on sampling, the only way you will get points marked down is if you click on the "give up" button which gives you that answer but you can no longer get points for that problem. If the specific problem has multiple parts and you get part of the answe...

Giselle_zamora_1L

if someone quotes you , you'll get a reply :)

Giselle_zamora_1L

Thank you to whoever made the groupme !

Giselle_zamora_1L

My guilty pleasure are cheesy rom coms like Clueless and 10 Things I hate About you!

Giselle_zamora_1L

Stem classes definitely make me question my major. If you don't like it don't do it, its you that has to do 4 years of it. I'm on a pre med track but probably going to drop the biology major and switch to a Pol Sci major.

Giselle_zamora_1L

It honestly really depends on the number of ligands and lone pairs, my best advice is honestly getting really familiar with all the shapes (flashcards work great) and when presented with a molecule identify the number of ligands and lone pairs and then match that to a geometry shape that best fits

Giselle_zamora_1L

look at the amount of electron densities so in this case, NH3 has 4, 3 ligands, and 1 lone pair. The number of electrons in sp^3 adds up to 4 (1 +3)

Giselle_zamora_1L

Yes so like other people mentioned its all in how you define it, they are both happening at the same time so while a Lewis base is donating an electron it is also receiving a proton. They are just trying to get more neutral. Lewis is in terms of electrons and Bronsted's definition the roles kind of ...

Giselle_zamora_1L

Hey I know how you feel, this quarter my home life was more chaotic than usual and mental and physical health issues certainly did not help my motivation. What I found to help was that for classes like this where you dread wanting to go and feel you can fall behind easily, DO IT FIRST! Its harder so...

Giselle_zamora_1L

Good luck to everyone still taking finals! GO KICK SOME FINAL [censored] !

Giselle_zamora_1L

yea I think you're going to have to do it manually and just count from Janurary on, good luck !

Giselle_zamora_1L

yes ! you are correct

Giselle_zamora_1L

Does anyone know if we extra credit for course evaluations or not for this class ?

Giselle_zamora_1L

You have until thursday for chem community and he sent out an email saying that we should have our final grades by Saturday I believe

Giselle_zamora_1L

Both involve bonding to 4 ligands, square planar has an additional 2 lone pairs while tetrahedral had 0

Giselle_zamora_1L

I will be going over my notes and keeping the flashcards I made to study for finals. Also ORGANIC CHEMISTRY TUTOR such a lifesaver

Giselle_zamora_1L

Yes I think focusing more on the textbook problems made all the difference for me for the final. Coming into this class I had a poor chem background and was unsure how to study (plus the current situation did not help at all) but I think for 14B textbook and lectures are the way to go!

Giselle_zamora_1L

I also wanted to add my thanks to everyone who helped throughout this quarter. The extra hours, the flexibility everyone's willingness to help us out really made all the difference. THANK YOU ALL

Giselle_zamora_1L

there is no official curve but as long as you get 50% of the required points , you pass with a C- and he just emailed everyone that he will be adding 10 additional points to everyone's grades, capped at 100%

Giselle_zamora_1L

Ok this is going to sound really weird but honestly it helped me stay focused and accountable if you go on youtube and search, "study with me real-time" there's a bunch of people that post videos of them studying and some have light music playing (like jazz or instrumental) , others are on...

Giselle_zamora_1L

Do you have 11 protons?

Because your sodium fine ;)

*technically a pickup line but whatevs

Giselle_zamora_1L

He sent out an email that although people did really well he will be adding an extra 10 points to everyone's grade, capped at 100%

Giselle_zamora_1L

In the grade breakdown there is a total amount of points that you could get in the class, as long as you get 50% of those total points you will pass with a C-

Giselle_zamora_1L

The due date was extended, as long as Chem Community shows your 50 post you should be good to go!

Giselle_zamora_1L

I still have 1 more final to go but I'm feeling really good about it so fingers crosses. I overall didn't do too hot in this class but there's always next quarter to improve, at this point it is what it is. Feeling very excited to binge watch a list of shows I have.

Giselle_zamora_1L

Yea same, I had like 7 more questions to go in like the last 15 mins, and I looked through them and I was so sad because they were problems i knew how to do but I just did not have the time

Giselle_zamora_1L

for this specific question, the third part , I converted 300 MHz to Hz and got 3 x 10^8 so when I was doing my calculation I got wavelength as .9 m , can someone explain why the solution says 1 nm, did I mix up some units along the way ?

Giselle_zamora_1L

for this question I am still confused on part b, are there not 3 CO molecules and therefore we should multiply 0.08 by 3 like in part a?

Giselle_zamora_1L

I was reading the textbook and am still a little confused as to when to use the formula m=cMV , can someone explain this to me please?

Giselle_zamora_1L

Can someone explains what delocalized pi bonds are and how they differ from delocalized electron bonds ?

Giselle_zamora_1L

Hi all, i also was conceptually confused on the delocalized election?

Giselle_zamora_1L

Hey, I am stuck on the drawing portions of these problems in Sapling. I understand the other parts of the questions and got them right, which makes me think I understand the overall properties and have a general understanding but I can't seem to figure out the structures according to Sapling. Any ti...

Giselle_zamora_1L

hi so does this mean that if we missed a couple of posts some weeks, we cannot make them up by posting more in following weeks ?

Giselle_zamora_1L

i am also reqlly worrried for grades because I don't know if anyone else had this problem but chem community was so hard to navigate for me. A couple of times I ended up on the Chem 14B section and so I just gave up on it for a while and now my anxiety about grades is starting to creep back up on me...

Giselle_zamora_1L

does anyone have any useful tips for converting SI units for the final or is it just straight up practice makes perfect kind of thing ?

Giselle_zamora_1L

thank you so much for your advice! But as someone who is struggling in this class and fears that will not do good, do you have some tips on how to improve from here on forward?

Giselle_zamora_1L

Definitely monitor the class as enrollment progresses because during my first enrollment it looked like the class was not going to be filled up but I used it anyways because I really wanted to and my other classes were not as essential. By the time the day my enrollment finished it was filled up. I ...

Giselle_zamora_1L

for part a, would you use some form of variation id c=(lambda)(frequency) ? This and the following question relates to the same metal used in a series of photoelectric experiments. A. If 3.607 x 10-19 J is required to remove an electron with zero kinetic energy from a metal surface, what would be th...

Giselle_zamora_1L

for part B, is there any particular reason why we should divide by Avogadro's number? I thought that the work function was the minimum amount needed to free the electron so that it would be a given? The steps to solve the problem are: 1. Use Ek = 1/2 mv^2 2. 2. Divide the total energy (work function...

Giselle_zamora_1L

So for part A, are there any additional steps to take after doing the 1/2 mv? Because I did that and I got a fairly large number that wasn't any of the options but I don't know where I went wrong. The steps to solve the problem are: 1. Use Ek = 1/2 mv^2 2. 2. Divide the total energy (work function) ...

Giselle_zamora_1L

Does anyone know if the host of step up sessions post the worksheets on chem community? I can't make the sessions but would still like the extra practice on my own

Giselle_zamora_1L

Does anyone know if the host of step up sessions post the worksheets on chem community? I can't make the sessions but would still like the extra practice on my own

Giselle_zamora_1L

is there a specific link where we could find additional problems to study for midterms or should the hw problems and textbook problems enough ?

Giselle_zamora_1L

I also had questions about balancing that equation / assuming it was balanced. I googled 3‑methyl‑3‑hexanol, which I think just confused me more. But assuming it is balanced how were you guys able to tell? This might be repetitive sorry but I'm just trying to understand.

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