CHEMISTRY COMMUNITY

Ruochen Yang 3B

Crash course also works!

Ruochen Yang 3B

I think you're going to look for the transition metal.

Ruochen Yang 3B

OMG I didn't notice that there will be TA review sessions! That will be AWESOME!

Ruochen Yang 3B

I think you can go to review sessions held by Dr. Lavelle and UAs. Some of my friends say that the UA sessions are helpful. Also, I recommend to read through your textbook and do the questions Lavelle has assigned in the syllabus. They are more complicated than most questions you'll meet during the ...

Ruochen Yang 3B

Thank you soooooo much! That's a lot helpful.

Ruochen Yang 3B

I'm planning to spend more time practicing driving and preparing to get my driving license, though it sounds not like a relaxation to me lol. What's more, I'm probably going to visit my friends and spend some time with them.

Ruochen Yang 3B

I'm going to attend the session addressing more recent topics like acid/base. I find them more difficult than quantum. Perhaps I'm tired of learning at the end of the quarter lol.

Ruochen Yang 3B

The final will be cumulative, so it will have everything we've learned. What I am curious is the percentage of material covered (will there be an emphasis on week 7+ OR an equal amount of everything). Today during his discussion section Dr. Lavelle said the final will be cumulative and the percenta...

Ruochen Yang 3B

As an international student, I'm also concerned with the problem. I think Dr. Lavelle has proposed another time that he thinks works for international students, but honestly, it's still not so good. By the way, where do you find the time for the final?

Ruochen Yang 3B

I would say going over your notes would definitely help! Also, I'm going to review all my sampling homework and textbook problems (which I find very useful). I've never attended a UA session, so I don't know how it works. Just try to ask questions and never be reluctant to ask for help!

Ruochen Yang 3B

Happy (late) Thanksgiving! I'm grateful that I have taken this course with yall amazing fellows!

Ruochen Yang 3B

So in summary, the final is 180 pts, which means more questions than midterms, and will last 1.5 hour. The format should be pretty similar to midterms: multiple choices, just cumulative. However, I do wonder if people living in other time zones can have an alternative plan.

Ruochen Yang 3B

Don't be stressed out! I think you can make easy points through weekly homework and chem community participation. The best way to boost your grade is definitely to get as many points as possible in your exams. Just work hard and try to do the textbook problems assigned, and you'll be fine.

Ruochen Yang 3B

Just think about it: sp3 means 1 s orbital and 3 p orbitals mixing, and sp2 means 1 s orbital and 2 p orbital mixing. Since the number of orbitals will conserve, you will get 1+3 orbitals for sp3 and 1+2 orbitals for sp2.

Ruochen Yang 3B

I think you are totally correct. Strong bond strength contributes to a high melting point. I think since ionic bonds are formed between ions, and a cation and an anion have opposite charges. As a result, they attract each other, and the attraction is fairly strong, so ionic bonds are stronger than c...

Ruochen Yang 3B

Hi! I would say no worries! Just try your best and work hard on the following final exam. Still, you have easy points to get like the chem community participation points and weekly homework points. Also, if you are really stressed out, maybe try to talk to your TA and they will probably give you use...

Ruochen Yang 3B

I also walk my dog every day twice. However, it's becoming cold recently, so I'm also doing aerobics inside and it's really fun! I recommend everyone to try aerobics.

Ruochen Yang 3B

I agree that you don't really need to know a lot about it, and there are probably no questions on polarity on MT2. However, it would be better to know some basics, which might help you solve questions in some ways.

Ruochen Yang 3B

I would say Dr. Lavelle is making questions pretty straightforward, so just go over the notes carefully, review your sapling homework questions, and do some extra textbook questions for practice, and you'll be fine!

Ruochen Yang 3B

The question is saying "important" because dipole-dipole is not the only force existing between molecules. Actually, the London dispersion force exists among all molecules. As a result, in order to emphasize the existence of dipole-dipole, the question is using the word "important&quo...

Ruochen Yang 3B

Yeah that question kind of confused me as well, but I think it's simply asking which Lewis structure helps form the overall structure or which Lewis structure makes up the overall structure. I don't remember the exact question, but I think you can find more information in Lavelle's lecture dealing w...

Ruochen Yang 3B

After taking the midterm exam already, I would say that it's not required since Dr. Lavelle will give you the chemical formula. However, it's better to try to memorize some of them and figure out the way they are formatted, especially when you are pursuing a chemistry-related major in the future. Ho...

Ruochen Yang 3B

Ok so the effective nuclear charge is just the charge that the electrons actually feel, but you have to take into account electron repulsion which would depend on the number of electrons available. I also know for a fact that the s orbitals are better at shielding electrons than p orbitals so that ...

Ruochen Yang 3B

Hi guys! I'm confused about question 5 from exercise 1E. Anyone can help?

Ruochen Yang 3B

I would say overall the course is manageable. There's not much homework, only 3 big tests, and the discussion section is kind of optional. It doesn't take much time like some other courses I am taking. However, things are becoming more and more difficult as I expect Hopefully we'll go through these ...

Ruochen Yang 3B

As someone has already suggested, it would be helpful to have a place only for study. You can never imagine how distracting it can be when you are studying in your bedroom with your comfortable bed. Also, taking a nap in the afternoon helps me better focus on my materials later. What's more, since I...

Ruochen Yang 3B

One best way to calm down is to be fully prepared! Just do some revisions and some extra questions and build some confidence. Also, having a good sleep or watching some videos can help. I would say having a pet is also a good way to relax when you are stressful and anxious.

Ruochen Yang 3B

Well, it seems I've already memorized my UID before using Chemistry Community lol. After sending several emails to different departments and offices of UCLA, you will definitely have the UID in your DNA.

Ruochen Yang 3B

What an idea! Thank you for organizing all the stuff for us! :)

Ruochen Yang 3B

I'm also wondering how this works. It seems that you cannot have partial credit when you have multiple choice questions for your midterm.

Ruochen Yang 3B

The quickest way is to click on "quick links" on the upper-left side and click on "Your post". Also, you can reply to one post, and on the right-hand side of your post, you can see your brief information with the number of your posts.

Ruochen Yang 3B

Hi guys! Just wonder how many points out of the total 500 should we get in order to achieve an A and above.

Ruochen Yang 3B

Hi everyone! I'm wondering if anyone could recommend TV shows related to suspense and crime. I've been obsessed with them recently.

Ruochen Yang 3B

Hi! I think sapling questions are very valuable sometimes, and in order to prepare for tests, I would do some textbook questions! Hope this will help!

Ruochen Yang 3B

I think our TA mentioned the score would be released on Thursday if I remember it correctly!

Ruochen Yang 3B

It's been fairly late, but I want to say Happy Halloween to you guys!

Ruochen Yang 3B

It's okay to feel sad about your exam for a while. However, things have been made and you have no way to change the reality. I think the most important thing right now is to focus on the topics we are learning and try to do better in later tests.

Ruochen Yang 3B

I have a puppy, so I would say it's fairly relaxing to have a pet and play with him/her. I always walk my dog when I feel stressful.

Ruochen Yang 3B

705324760 wrote:Q: What is the chemical formula for "coffee"?
A: CoFe2

This one is really fun.

Ruochen Yang 3B

A photon checks into a hotel and is asked if he needs any help with his luggage. He says, "No, I'm traveling light."

Ruochen Yang 3B

Q: Did you hear oxygen went on a date with potassium? A: It went OK.

Ruochen Yang 3B

I thought it was 50 posts at the end of the quarter! Do we have ways to make up?

Ruochen Yang 3B

Week 7 discussion. Everything will be like what you've done in MT1 I guess.

Ruochen Yang 3B

I think comments above have already given the answer! By posting this question, you already get one point for your participation!

Ruochen Yang 3B

I would say it's better to know basic and easy chemical formulas cuz we are going to use them all the time! There's definitely a pattern on the vocabularies, and as long as you find out the pattern, things would be much easier. It's ok not to know how to write sophisticated chemical formulas. A lot ...

Ruochen Yang 3B

Hi! I would say khan Academy really helps since it has videos and practice questions that really make things clear! Also, Crash Course on Youtube can help you out if you don't have enough time and just want to refresh your mind, getting some basic ideas. These videos are relatively short and in a qu...

Ruochen Yang 3B

Hi! I've stated to use iPad and Apple Pencil to take notes since high school, and it's definitely convenient! I think the biggest advantage is that you can do a lot of things to make your notes tidy and easy. For example, I personally like to put a lot of diagrams in my notes, and using iPad would s...

Ruochen Yang 3B

I think it's recommended to have an external webcam, but it's okay as long as your TA can see your surroundings through zoom. I think you can use your laptop for the exam and have your phone or tablet on zoom to serve as a webcam. That would be economical and practical!

Ruochen Yang 3B

I would say it's theoretically impossible not to have limiting reactants, because certain reactants should be excessive, making not enough other reactants. If you want to use up all the reactants, I think it should be under very precise calculation to reach the perfect ratio according to the chemica...

Ruochen Yang 3B

Hi! I'm also kind of rusty on high school chem. Last time I did chem related exams was in sophomore SAT subject test! I haven't learnt AP Chemistry unlike some students. I think the best way to master Chem after such a long time is to go through Dr. Lavelle's materials on his class websites because ...

Ruochen Yang 3B

For anyone who ordered their textbook from the UCLA store and already received it, was it a physical copy? and if so, did it include an access code for sapling and/or the e-book? It's obviously not.(I think a hardcopy one should be far more expensive) You should receive a piece of paper with your S...

Ruochen Yang 3B

Does anyone know what the Sapling learning thing is? I heard it was extra practice but I was wondering how to access it/what kind of practice it was. Actually we do need Sapling to hand in our weekly homework. You can buy the bundle at UCLA store and they will ship a code for Sapling to you if you ...

Ruochen Yang 3B

I think we can get up to 5 points per week by posting questions of our own, answering other students' questions, and commenting below others' questions and replies. Hopefully you've already got 1 point for your question here!

Ruochen Yang 3B

5 in China

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