CHEMISTRY COMMUNITY

jasonfarrales3D

Thank you Dr. Lavelle for pushing me to work harder. Furthermore, thank you for providing a UA program to the class, they all were so helpful in understanding the overall concepts in the class. Hope you have an amazing Spring Break!! (PS, I am going to miss the little dances that you would do before...

jasonfarrales3D

Chemist make very bad DJs (EXCEPT DJ LAVELLE!!!), they take extra care to not drop the base.

jasonfarrales3D

For spring break, I plan to just hang out with family, catching up with them. I definitely want to use that week for relaxation, as I know spring quarter might be as hectic as winter quarter.

jasonfarrales3D

I final was not too hard, most of the questions were very straightforward, and I did notice a few textbook problems. Good luck to the rest of you guys as well!

jasonfarrales3D

The final grades will most likely be posted one week or one and a half weeks after our final!

jasonfarrales3D

You can find the overall order of the reaction by adding up the individual orders of the reactants. For example, if we had two reactants, A and B, and A was first order while B was second order, the overall order of the reaction would be three!

jasonfarrales3D

The number of problems on each section of the final is determined by how much time we have spent on that specific topic. So most likely, we will have more problems on kinetics or thermodynamics compared to problems on chemical equilibrium.

jasonfarrales3D

I believe you only need a 50% in the class (aka 200 total points) to pass with a C-.

jasonfarrales3D

My favorite chemistry topic so far has been chemical equilibrium!

jasonfarrales3D

Dr. Lavelle has provided lots of hours of review sessions for the final exam as many of the workshops/step-up sessions and office hours have been changed to sessions focused on different outline topics.

jasonfarrales3D

jasonfarrales3D

My favorite exercise is definitely cardio, especially if it's in the form of something I love like playing basketball!

jasonfarrales3D

This feeling of yours is definitely relatable. In order to combat these emotions, I always tell myself that at the end of the day, worrying about the score will not change anything. Be glad that the exam is over, and reward yourself for all the hard work and dedication you put into studying for it.

jasonfarrales3D

Due to the averages on our exams being pretty high, I do not think Professor Lavelle will curve our exam scores. The closest thing I have seen to Lavelle curving was him adding 10 extra points to our Chem 14A final score.

jasonfarrales3D

Honestly, my results from the past two exams have been better than I expected. I am doing way better on the 14B exams compared to the 14A exams (I find that weird because imo 14B material is much harder than the 14A material), and if I get a decent score on the final, I may be able to finish this cl...

jasonfarrales3D

This past week, I was basically locked up in my room and studying for the exam. So this weekend, I mainly just hung out with my family and played video games!

jasonfarrales3D

Why was there an explosion in the chemistry lab?
Because oxidants happen!!

jasonfarrales3D

When a system is doing work, it is using up and losing energy in order to make this happen. Because of that, your work value will be negative. On the other hand, when work is being done on a system, it is gaining energy, resulting in a positive value of work.

jasonfarrales3D

For further help, I feel like UA step-up and workshops will be perfect for you. Every week, I try to attend Hannah's step-up session, as well as Michael, Kate, and Justin's workshops. Sacrificing a few hours every day just to go to these sessions really help with a better understanding of the materi...

jasonfarrales3D

Our final will be cumulative, consisting of all the topics from week one to week ten.

jasonfarrales3D

I plan to take both Chem 14BL and Chem 14C next quarter!

jasonfarrales3D

Thank you for this post! I felt really down about my midterm score as well, but this honestly made me see it from a much more different and positive perspective.

jasonfarrales3D

What is the differences between a chemistry joke and a physics joke?

Chemistry jokes can be funny periodically, but physics jokes have more potential.

jasonfarrales3D

I plan to take Chem 14BL next quarter, mainly because all of the chemistry I have learned so far is still fresh in my head. Furthermore, I plan to take Chem 14C next quarter as well.

jasonfarrales3D

It really just depends on what formula you are using, as some have temperature in Kelvin while others have it in Celsius. Furthermore, always pay attention to your units, as they usually indicate if you ever need to convert between the two.

jasonfarrales3D

Finals are much more difficult than midterms, mainly because they are cumulative! For midterms, you basically have a good idea of what is going to be on the exam, but for the final, a question on any of the topics/outlines can appear.

jasonfarrales3D

When finding the change in temperature, it does not matter if you convert the temperature from Celsius to Kelvin (or vice versa) since the temperature difference will be the same no matter the units. Hope this helps!

jasonfarrales3D

Just stole some hydrocarbons the other day, I certainly hope I hadn't benzene.

jasonfarrales3D

Sadly, you are not able to review the midterm yourself, but you are able to review the problems you got wrong at any TA's office hours!

jasonfarrales3D

I think the most important aspect in preparing for exams would be redoing the textbook and homework problems, and I even remember seeing a few of the homework problems on the actual exam. Furthermore, it is a good thing that you went to those workshops, but relying on them alone is not the best idea...

jasonfarrales3D

Thank you for these tips! I can definitely relate to you constantly pausing the lectures, as Lavelle sometimes says very important information but does not write it down. Good luck on your next midterm!

jasonfarrales3D

How did the chemist greet his chemist friend on her birthday?
"Hydrogen Phosphorous Phosphorous Yttrium
Boron Irdium Thorium Dysprosium!"

jasonfarrales3D

Went straight to Call of Duty after the midterm, and had a great time talking and hanging out my friends (had to ignore them for a week in order to study for the midterm haha).

jasonfarrales3D

For endothermic reactions, increases its temperature leads to products being more favored, and as a result the K value is increased. On the other hand, when its temperature is decreased, reactants become more favored, resulting in a decreased K value. For exothermic reactions, an increase in the tem...

jasonfarrales3D

A perfect system occurs when the heat the system losses is equal to the heat that the surrounds gain.
In this, we use the equation: qsys (heat of system) = -qsurr (heat of surroundings), where qsys + qsurr = 0.

jasonfarrales3D

Last quarter, most of our midterm grades came out 1-1.5 weeks after we took the exam. Still though, I wouldn't be surprised if it took longer than that, considering the fact that we are able to get partial credit on some of the questions.

jasonfarrales3D

Given your Ka or Kb value, you can approximate only if their values are less than 10^-4. Furthermore, if you find the percent protonation/ionization, and it is greater than 5%, then that approximation is invalid, and you would have to go through and use the quadratic formula. If the percent protonat...

jasonfarrales3D

To find a compound's concentration from pH, you use 10^(-pH).

jasonfarrales3D

This one made me laugh more than it should have.

jasonfarrales3D

I believe the best way to study for Chem 14b is to do all of the assigned textbook problems, attend multiple UA sessions (as they give great practice problems and review the lecture), and to work on the Sapling problems. Furthermore, I heard TA and Lavelle's office hours are a great help if you ever...

jasonfarrales3D

Our midterm 1 will cover the topics Chemical Equilibrium, Acid and Base Equilibrium, and a little bit of Thermochemistry. He also announced that it will consist of all the lectures up to this past Friday, as well as all of the textbook problems from Chemical Equilibrium, Acid and Base Equilibrium, a...

jasonfarrales3D

Last quarter, much of the midterm and other exams were mainly related to the textbook problems, so it really helps to do them! Good luck studying!

jasonfarrales3D

A neutron walked into a bar and ordered a drink, and the bartender gave the drink for free. The neutron asked why the drink was free, and the bartender replied, "for you no charge."

jasonfarrales3D

Hi! We would use the inverse value of K for a reaction when we are trying to find the K value of its reverse reaction.

jasonfarrales3D

My favorite go-to movie to relax is Cars 1, easily the best Cars movie of all time (especially that Tuner scene haha).

jasonfarrales3D

Hello! When a reaction "shifts to the right," this shows that the formation of products is favored (there are more reactants than products in the reaction, and in order to get back to the K value, the production of product is heavily needed). When the reaction "shifts to the left,&quo...

jasonfarrales3D

Starting off, Q>K indicates that there are more products than reactants at the given time during this reaction. Thus, the formation of reactants is favored, so the reaction will shift towards the left (aka, the reverse reaction is favored. On the other hand, Q<K indicates that there are more reactan...

jasonfarrales3D

Our first Sapling Homework assignment is due on the Sunday of week two (aka January 17)!

jasonfarrales3D

We only include water in the ICE box when it is in the gas phase. As mentioned before, if water is a liquid (or even a solid), it is not added as its concentration never changes.

jasonfarrales3D

Hello! For me, what really helped me the most last quarter were the UA workshops that were hosted every week. The UAs are so helpful, not only do they give us really good practice problems, but they also explain the topics and address any misunderstandings. Furthermore, the problems on the syllabus ...

jasonfarrales3D

I have a few New Year's resolutions, one of them being that I want to keep up and connect with my friends and family more. Last quarter, I felt as if I was "too focused" on my academics, which led me to completely disregarding all of my other personal relationships. Also, Happy New Years, ...

jasonfarrales3D

Did you hear about the guy that cooled himself to -273.15˚C and was still 0K?

jasonfarrales3D

I assume that Professor Lavelle will review most of the Chem 14a material in Chem 14b, similar to how he reviewed high school material during Chem 14a.

jasonfarrales3D

Anything above 50% of the total points in the class is a passing grade.

jasonfarrales3D

Me: Did u hear about the bear that dissolved in water?
Friend: Huh?? Thats impossible!!
Me: It was a polar bear!!!

jasonfarrales3D

Unfortunately, there will not be a curve in this class, but Professor Lavelle did add +10 points to each of our finals!!

jasonfarrales3D

Staying motivated has definitely been a struggle for me during this fall quarter, and one solution I found was finding a study buddy. We practically zoom everyday, studying for chemistry together while keeping each other in check as well.

jasonfarrales3D

I will definitely be using this winter break to spend time with my family! I hope your winter break goes well, stay safe!!!

jasonfarrales3D

"en" stands for the bidentate ligand ethylenediamine which has a chemical formula of NH2CH2CH2NH2

jasonfarrales3D

Thank you for these videos, I will for sure check them out especially since I need more practice in naming compounds. Take care!

jasonfarrales3D

Chem_Mod wrote:All material will be finished on Wednesday, while on Friday I believe Dr. Lavelle will do some practice problems. ~UA

Thank you for the information!!

jasonfarrales3D

I am doing alright, thank you for asking. Time to start grinding on schoolwork as finals week is approaching, good luck to everyone!!

jasonfarrales3D

When writing the formula for a coordinate compound, you should always arrange the ligands by their name, without their prefix, in alphabetical order.

jasonfarrales3D

Homework is always due on Sunday night by 11:59 on whatever week it is assigned to.

jasonfarrales3D

Hi! The UA workshops have really been helpful with explaining the topics that I find confusing, so I like to attend as many as I can. Furthermore, I also plan on reviewing all of the textbook problems, while also reviewing all of my notes and watching the Organic Chemistry Tutor for a better underst...

jasonfarrales3D

The final will cover everything from midterm 1 and midterm 2 to the topics right after midterm 2 as well.

jasonfarrales3D

Sheesh, this problem is review of a week one topic haha. Anyways, the first thing you should do is convert the overall compound's percentages into grams. Because the percentages of each element add up to 100%, we can just change their "%" symbols into "grams" (37.5% C --> 37.5g C...

jasonfarrales3D

The way I de-stressed after the second round of midterms was just doing the things I love: binging my favorite tv shows, playing some video games, hanging out with my family, cooking, working out, etc. Pretty much anything that lets me relax while keeping my mind off of academics are things that I l...

jasonfarrales3D

Nandhini 1J wrote:My TA just replied saying there won't be any discussions or lectures on Friday because the university is closed.

Thank you for the clarification!

jasonfarrales3D

Looking at melting point, the higher the intermolecular force, the higher the melting point. With that being said, molecules with ion-ion bonds would usually have one of the highest melting point (as they are the strongest intermolecular force), while molecules with London dispersion forces usually ...

jasonfarrales3D

So far, my other teachers have cancelled their discussion times for the week, no matter what day it is scheduled. But in terms of this class, honestly, the only thing we can do is just wait for an announcement from Dr. Lavelle.

jasonfarrales3D

Most of my distractions at home come from either my family members, or my phone. An easy solution for the second problem is I just put my phone in another room, preventing me from checking up on my notifications (which usually turn into 20-30 minute social media binges). In terms of family members b...

jasonfarrales3D

I am pretty sure a lot of other people (including me haha) are on the same boat as you!!

jasonfarrales3D

The enclosed brackets around the lewis structure signify the compound's overall charge. For example, I3+ would have []+ around the lewis structure to show that it has an overall positive charge.

jasonfarrales3D · Re: Homework due date Sapling homework is always due on Sundays at 11:59 pm!

Sapling homework is always due on Sundays at 11:59 pm!

jasonfarrales3D

The easiest way I remember the trends of the periodic table is that atomic radius increases as it goes to the left of the period and down the groups. Meanwhile, the rest of the trends (electronegativity, electron affinity, and ionization energy) all go the opposite way, increase to the right of the ...

jasonfarrales3D

If a decimal point appears in a number, then all of the zeros in that number are included in its total amount of sig figs. For example, 2000000 would only have 1 sig fig because the number contains no decimal point, while 20.00000 would have seven total sig figs since there is a decimal point.

jasonfarrales3D

Van der Waals forces and London dispersion forces are basically synonyms of each other, and are used to describe the force of attraction between two dipole molecules.

jasonfarrales3D

Regular Show and Big Time Rush are my two favorite TV shows of all time. In terms of Netflix shows, I really enjoyed Series of Unfortunate Events (I also enjoyed reading all of the books when I was younger), as well as Lucifer because of its sarcastic humor.

jasonfarrales3D

josephspindler2L wrote:Will there be a lecture posted this Wednesday? Just checking to see as it's Veteran's Day.

In addition to that, what happens if we have a lab on that day? I assume that we might have to join another lab session instead but I am not sure.

jasonfarrales3D

The transition from the semester system in high school to the fast-paced quarter system in college has been a pretty difficult to get used to, but so far I am doing pretty well in my classes. I hope things have been going great for you as well, cheers to making it to week six!!

jasonfarrales3D

I got a pretty decent score on midterm 1, and what really helped me were the textbook problems in addition to the UA step-up sessions. Our UAs are so nice and smart, and will happily help anyone that has any questions. Furthermore, they also give out practice worksheets during these sessions, and a ...

jasonfarrales3D

In terms of gamma rays, they have the highest energy on the electromagnetic spectrum. With that being said, energy is inversely proportional to wavelength, and because gamma rays have such high energy amounts, its wavelength will in turn be quite small (usually around 10^-12 to 10^-16 m in length).

jasonfarrales3D

To find the maximum number of electrons that are ejected when given the total energy, you first need to find the value of the threshold energy. Because the threshold energy is in units of Joules per photon (Joules/photon), you divide the total energy by the threshold energy (in this case, your Joule...

jasonfarrales3D

When looking at this problem, remember that the atomic radius of an element increases as it goes down a group and decreases as goes across a period on the periodic table!!

jasonfarrales3D

I do not think Dr. Lavelle has made an announcement yet regarding midterm test scores. But since we can get partial credit on some questions, I feel like it may take several days until all of the midterms are graded. Hope this helps!

jasonfarrales3D

Honestly, staying focused is really easier said than done, especially during these times of uncertainty. What helps me stay focused is to first put my phone in a place where I cannot easily access it, so I do not get distracted by notifications or any other news. Furthermore, I like to play some ins...

jasonfarrales3D

I first brought my little brother to a social distanced "trunk or treat" event at his elementary school. After that, I did a few Sapling problems in the afternoon, then ended off the night by watching the Peanut Movie with my family.

Hope all you guys had a great Halloween! :)

jasonfarrales3D

I love revisiting my childhood by watching all of my past favorite television shows. Furthermore, I find this so interesting as I am able to see the show from a different perspective than I did as a 6th grader in middle school. This allows me to understand parts of the show that I never was able to ...

jasonfarrales3D

Me: Why does a hamburger have less energy than a steak?

Friend: I don't know, why?

Me: Because it's in the ground state.

Friend: *starts laughing hysterically*

jasonfarrales3D

During my discussion section, my TA said that we could just use our phones as webcams. As long as your phone can join the zoom call, you can angle your phone's camera towards your working space, thus allowing you to use that instead of having to pay for a webcam!! :)

jasonfarrales3D

I would say to prioritize memorizing all of the equations, as well as how to use them for each of the sections we have learned so far. Furthermore, the textbook problems have been a very big help for me in addition to the sapling questions. :)

jasonfarrales3D

Hey!
The IT Services at UCLA were able to fix the problem with the CCLE website. If you want any more information, here is the link: https://www.it.ucla.edu/news/it-service ... 5-resolved.

jasonfarrales3D

Hi! You can access them on the chemistry 14a website under "constants and equations" (right below the tab "Everything you want to know about Sig Fig"). If you do not see it, I have the link to it: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14A/constants_equati...

jasonfarrales3D

Yes, threshold energy and work function refer to the the energy needed to remove an electron. Thus, the terms threshold energy, work function, and "energy needed to remove an electron" all mean the same thing (basically synonyms of each other).

jasonfarrales3D

Hi! You can access them on the chemistry 14a website under "constants and equations" (right below the tab "Everything you want to know about Sig Fig"). If you do not see it, I have the link to it: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14A/constants_equatio...

jasonfarrales3D

Yes, the terms threshold energy and work function are synonyms of each other.

jasonfarrales3D

When I took the practice quiz during my discussion time, my TA allowed us to use our phones. As long as you join the zoom call through your phone and keep it angled towards your workspace, then you could use that rather than having to buy a webcam.

jasonfarrales3D

Tiffanny_Carranza_2D Does anyone know if this applies for the textbook homework as well? I'm not sure if we are supposed to turn it in somewhere. The textbook homework is also for extra practice and they are not to be turned in. As of right now, the only homework assignments we have are the 5 posts...

jasonfarrales3D

The post-assessment on the audio visual modules is not graded, and you can retake them as many times as you want. But in terms of the Sapling assignments, yes they are graded.

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