CHEMISTRY COMMUNITY

Jaklin Astvatsatryan

Are you made out of beryllium, ununtrium, and titanium ? Cause you're a BeUTi

Jaklin Astvatsatryan

I tried writing jokes about the periodic table…
…but I realized I wasn’t quite in my element.

Jaklin Astvatsatryan

love this!!

Jaklin Astvatsatryan

Yiyang Jen Wang 4G wrote:Anyone know where to find any past exam questions for practicing? Really need to work on some actual problems!

You can try looking at the test banks but try finding practice exams online if that doesn't work out.

Jaklin Astvatsatryan

Cindy Adiwidjaja 1B wrote:After having taken the class, I can confirm that there is no curve. The amount of points you receive is the exact grade you get in the class. The only "curve" he does is gives you a C- if you get at least 250 points.

I can second this and that getting a 250 points gives a C-

Jaklin Astvatsatryan

q would be a negative value because it is the cooling system around the chamber. The chamber is releasing heat into the surrounding.

Jaklin Astvatsatryan

What show do cesium and iodine love to watch together?
CsI

Jaklin Astvatsatryan

What did one charged atom say to the other?
I've got my ion you.

Jaklin Astvatsatryan

oxygen went for a second date with potassium and
It went OK2!

Jaklin Astvatsatryan

When changing a variable to a delta, you must make sure to change a variable on the other side of the equation to a delta as well; these variables include P, T, or n. R can not be a delta because it is a constant.

Jaklin Astvatsatryan

Naji Sarsam 1F wrote:We discussed how three concepts.

1.) how to balance a redox reaction by splitting it into its composite half-reactions and then adding them together

2.) cell diagram notation

3.) the nernst equation

Thank youuu!!!

Jaklin Astvatsatryan

They're basically the same thing except a salt bridge connects two beakers connected with a tube filled with gel, allowing the salts to move.A porous disk, however, lets the salts transfer to either side of the disk.

Jaklin Astvatsatryan

https://www.sciencedaily.com/releases/2 ... 104741.htm
Scientists have developed an economical catalyst that recycles greenhouse gases into ingredients that can be used in fuel, hydrogen gas, and other chemicals. Step towards reversing global warming.

Jaklin Astvatsatryan

I felt the same. But I recommend watching videos to really instill the material covered in class so that you can apply them to solving problems. I also recommend doing the Sapling problems if you can because it builds you up to solving difficult questions.

Jaklin Astvatsatryan

you don't need to know the derivation but i think it's helpful knowing it because you have a better understanding of the equations application.

Jaklin Astvatsatryan

Yes you do! you exclude it when it's in a solid or liquid phase because it acts as a solvent and the concentration doesn't change much during a reaction.

Jaklin Astvatsatryan

What is the chemical formula of coffee? CoFe2

Jaklin Astvatsatryan

Struggling through chemistry? Keep your ion the prize.

Jaklin Astvatsatryan

Who’s the best at making bad jokes about iodine and americium? I Am

Jaklin Astvatsatryan

I wasn't able to make Friday's lecture. Does anyone mind telling me what was discussed. Thank youuuu!

Jaklin Astvatsatryan

Keerthana Sivathasan 2E wrote:Usually we don't get answer keys for tests, but I think talking to your friends and comparing answers would be great so you can help each other.

Definitely ask your friends and compare because answers aren't posted and it helps because similar material is on the final.

Jaklin Astvatsatryan

Why did the attacking army use acid? To neutralize the enemy's base

Jaklin Astvatsatryan

If you're not part of the solution, you're part of the precipitate.

Jaklin Astvatsatryan

I would recommend you watch videos that go over the concepts that will be covered on the midterm. Once you have a better grasp on the topics, it'll be easier to apply them and you'll know which equations to use. Also, if you have the Sapling, I recommend you do the problems because they're questions...

Jaklin Astvatsatryan

Best way is to memorize the strong acids. But a strong acid completely dissociates in a solution so that's another way to tell a difference.

Jaklin Astvatsatryan

Andrea_Torres wrote:A closed system is when energy can exchange with its surroundings, but an isolated system is when nothing exchanges with its surroundings.

And an isolated system can't exchange any matter or energy

Jaklin Astvatsatryan

Did you hear the joke about cobalt, radon, and yttrium?
It was CoRnY.

Jaklin Astvatsatryan

What should you do if no one laughs at your chemistry jokes?
Keep telling them until you get a reaction.

Jaklin Astvatsatryan

Jasmine 2C wrote::o we can pick up our exam?

I think we can't keep up our exams. My math professor for last quarter emailed the class and notified us that UCLA has a new policy and we're not allowed to keep our exams, but we can look at them.

Jaklin Astvatsatryan

The midterm and final tend to be more extensive and cumulative so you have to make sure you understand concepts, not just memorize. The tests are good in helping you study for the midterm and final tho.

Jaklin Astvatsatryan

The sapling is great because it gives you extra problems to solve aside from the textbook problems and breaks down concepts that you always have access to.

Jaklin Astvatsatryan

Basically, when you add a solid to a solvent, like water, it just sits at the bottom (it doesn't dissolve), therefore it has no concentration and doesn't affect the overall equilibrium constant.

Jaklin Astvatsatryan

He sent an email last quarter saying that final exams will be available the 3rd week of winter quarter at 3034 Young Hall. So I assume Friday they'll be accessible ?

Jaklin Astvatsatryan

Why do chemists enjoy working with ammonia? Because it's pretty basic stuff.

Jaklin Astvatsatryan

Anions aren't negative, they're just misunderstood.

Jaklin Astvatsatryan

If Kc decreases with an increase in temperature, the reaction shifts to the left, making it an exothermic reaction. The Kc can also increase with a decrease in temperature, causing the reaction to shift to the right.

Jaklin Astvatsatryan

It's kinda like the concept of having a liquid or water in the reaction. The concentration of water as a reactant is large and remains constant as a product therefore you don't see it cause a shift in the equilibrium.

Jaklin Astvatsatryan

For an exothermic reaction (ΔH is negative), K decreases with an increase in temperature. Increasing the temperature causes the equilibrium to shift to the left.

For an endothermic reaction (ΔH is positive), K increases with an increase temperature.

Jaklin Astvatsatryan

What do tomb robbers do to pyramids? -Radium

Jaklin Astvatsatryan

What do you do to dead elements? You barium.

Jaklin Astvatsatryan

Jaklin Astvatsatryan

Jaklin Astvatsatryan

AGaeta_4E wrote:For some reason the word titration just threw me off so it really took me a minute to put something down.

Same. I was so lost for a second.

Jaklin Astvatsatryan

Nare Arakelian Dis 3E wrote:Does anyone know when we will get our scores back

I'm pretty sure we'll get it back by next next week Sunday because it took a week to grade the midterms.

Jaklin Astvatsatryan

The supplemental worksheet constructed by Lyndon was so helpful! Thank youu

Jaklin Astvatsatryan

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

Jaklin Astvatsatryan

The readings can be extensive so try doing the homework problems and reading topics that you're still confused on.

Jaklin Astvatsatryan

Jaklin Astvatsatryan

got you!

Jaklin Astvatsatryan

Create your own worksheets! Take problems from the book and solve them. Go back and grade yourself and that way you can see where you need more practice/help.

Jaklin Astvatsatryan

Where do you put dirty dishes? In the zinc.

Jaklin Astvatsatryan

here's a picture of the notes

Jaklin Astvatsatryan

https://www.sciencenews.org/article/rib ... meteorites

Scientists have found ribose in meterorites which is a part of the backbone of RNA.

Jaklin Astvatsatryan

I tried writing jokes about the periodic table... but I realized it wasn't in my element

Jaklin Astvatsatryan

Try finding previous tests from the test bank and study those. You could also watch videos which are helpful and do more than the assigned homework questions for practice.

Jaklin Astvatsatryan

https://www.sciencedaily.com/releases/2 ... 095754.htm
Scientists are using Xrays and infrared light to study mummies which can provide insight to life thousands of years ago.

Jaklin Astvatsatryan

Alexis 3F wrote:Does anyone know how many questions or how much time the final is supposed to be?

It's three hours...

Jaklin Astvatsatryan

Oxygen, hydrogen, sulfur, sodium, and phosphorous walk into a bar. The bartender said, "OH SNaP!"

Jaklin Astvatsatryan

Why should you go drinking with neutrons?
Because wherever they go, there's no charge!

Jaklin Astvatsatryan

sbeall_1C wrote:Dr. Lavelle also said he will covering sigma and pi bonds in more depth for the first 5 minutes of class tomorrow and that will be on Test 2!

So all of Monday's lecture won't be on the test?

Jaklin Astvatsatryan

https://www.sciencedaily.com/releases/2 ... 093930.htm

A new grid battery design that is energy renewable

Jaklin Astvatsatryan

Oduwole 1H wrote:Will there still be a workshop this upcoming week?

If you look at the post right above yours it says there was a drop-in which I'm sure will continue.

Jaklin Astvatsatryan

What do cesium and iodine love to watch together?

CsI

Jaklin Astvatsatryan

When one physicist asks another, "What's new?" what's the typical response?

C over lambda

Jaklin Astvatsatryan

KatherineValdez_4B wrote:What is the final unit for the wavelength?

A unit of wavelength is in meters which you can convert to nm.

Jaklin Astvatsatryan

https://www.sciencedaily.com/releases/2 ... 111826.htm
A substitute for using fossil fuels to produce a gas has been found through the production of an artificial leaf that uses sunlight, CO2 and water.

Jaklin Astvatsatryan

silver walks up to gold at the bar and says "AU, get out of here."

Jaklin Astvatsatryan

H20 is water and H2O2 is hydrogen peroxide. What is H2O4?
Drinking

Jaklin Astvatsatryan

ValerieChavarin3E wrote:The sampling isn't mandatory but it is highly recommended as it provides you with extra practice and questions that are useful to study for the exams.

Yea, not required but it does help a lot. Shows you step by step how to solve problems.

Jaklin Astvatsatryan

Katherine Brenner 3H wrote:Does anyone know when the midterm review sessions are for next week? ( week of midterm).

If you go to the class website and click the Midterm Review Sessions and Rooms, it will show you all the times and sessions

Jaklin Astvatsatryan

Thank you for sharing your story. It's inspiring to hear that you made it that far and your love for science continues to grow. I am still debating on what route to follow but your story reassured me that I will be exposed to so many fields in medical school.

Jaklin Astvatsatryan

https://phys.org/news/2019-10-hydrogen- ... emote.html
Scientists at MIT have developed an inexpensive and portable device to produce hydrogen peroxide. useful in improving sanitation.

Jaklin Astvatsatryan

https://phys.org/news/2019-10-mysteriou ... human.html
The article talks about the findings of microproteins and how it can be linked to cancer

Jaklin Astvatsatryan

Jaklin Astvatsatryan

do we need bluebooks for the midterm?

Jaklin Astvatsatryan

guys i really recommend watching videos, esp my visual learners. start problems and try doing them without notes and then watch videos if you're really stuck.

Jaklin Astvatsatryan

So we can get partial credit if we show our work and we have the right idea, but mess up the calculations? yes I remember my TA saying we get partial credit for calculations and showing work. Thank you!! Imma need that partial credit. I messed up on this question because I mixed up my ratio which i...

Jaklin Astvatsatryan

Jaklin Astvatsatryan

don't laugh too hard

Jaklin Astvatsatryan

I wanted to say thank you to Dr. Lavelle for creating such helpful video modules for each topic in this course. Lots of times in class it's hard for me to comprehend everything that is being taught because I don't have enough time to process each point. However, the videos allow me to go through th...

Jaklin Astvatsatryan

Are midterms and the final curved ?

Jaklin Astvatsatryan

Even though we're only required to submit 5 problems from the book as homework, I recommend doing a few more because the concepts we learn can be applied in different contexts and you want to be prepared for any type of question. Also to help with the anxiety, I chew gum while I take a test, idk why...

Jaklin Astvatsatryan

All the good chemistry jokes Argon

Jaklin Astvatsatryan

Kristina Rizo 3K wrote:what does Chem_mod mean? Is that the professor?

Yes it's the professor's account

Jaklin Astvatsatryan

If we need to use the answer of one question for the next question and our answer for the first question is wrong, will we not get full credit for the second, even if our calculations on the second were correct? If I'm not mistaken, we can receive partial credit for problems if it is evident that w...

Jaklin Astvatsatryan

Do you guys recommend reading the textbook with the homework or just doing the practice problems from the book? Also do you guys go over the problems multiple times or just do it once and then move on? I recommend reading the chapter and especially reviewing the sample problems. Breaking it down in...

Jaklin Astvatsatryan

Thank you for the advice!! Update us on how Med school is going.

Jaklin Astvatsatryan

This isn't a homework problem but under Fundamental E exercises, is the problem, "The approximate population of Earth is 7.0 billion people. How many moles of people inhabit Earth? (b) If all people were pea pickers, how long would it take for the entire population of Earth to pick 1 mol of pea...

Jaklin Astvatsatryan

I didn't take AP Chem in high school but we should all be up for a challenge. If any of you guys want, we can form study groups and help each other!!

Jaklin Astvatsatryan

https://www.sciencedaily.com/releases/2 ... 132701.htm
The article discusses how chemists have fabricated the color changing of nanoparticles.

Jaklin Astvatsatryan

Lauren Sanchez 3D wrote:Just to make sure, the homework problems are now due during our actual discussions right?

Yes. Our TA's will be collecting them the day of your discussion.

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