CHEMISTRY COMMUNITY

Jack Kettering 3D

I’m taking a couple summer classes. Physics 5A and Stats 13!

Jack Kettering 3D

Constance Newell wrote:Do yall know if anymore spots are gonna open up?

One of my friends emailed the professor and she said there will be no more spots :(

Jack Kettering 3D

Unfortunately he doesn’t teach 14C :(

Jack Kettering 3D

Thank you so much Dr Lavelle!!! Wish I could have u again :(

Jack Kettering 3D

I thought it was way better than I expected. Still anxious to see my grade tho

Jack Kettering 3D

Do as many textbook problems as possible!!

Jack Kettering 3D

There will be a ton of review sessions. Lavelle is all about review

Jack Kettering 3D

I’m pretty sure as long as you post 50 by the end of the quarter you’ll get full credit so I wouldn’t worry

Jack Kettering 3D

I do a ton of practice problems and take deep breaths and just believe in myself

Jack Kettering 3D

I think it’s really just preference. If you feel like taking the B classes simultaneously helped you then I’d so go for it with the C classes!

Jack Kettering 3D

n actually represents the number of electrons transferred during the reaction

Jack Kettering 3D

Do as many textbook problems as possible!

Jack Kettering 3D

Q is at any point not at equilibrium and K is only when the reaction is at equilibrium so they will have different values

Jack Kettering 3D

Look over your notes and do as many of the textbook problems as possible :)

Jack Kettering 3D

If you already have full points then I'd so no!

Jack Kettering 3D

Yep all the ones listed are state functions and there are several more like temperature for example!

Jack Kettering 3D

Yep when volume is constant no work is done!

Jack Kettering 3D

Probably by Thursday or Friday like for the first midterm :)

Jack Kettering 3D

I was working during the fall quarter and I definitely had a lot on my plate but it is 100% doable if u do a good job of managing your time :)

Jack Kettering 3D

My favorite food is chicken parm!!

Jack Kettering 3D

I wouldn’t worry about it too much. As long as you’ve done all your assignments in time you’ll be ok :)

Jack Kettering 3D

No they haven’t been updated yet. That is done very infrequently so I wouldn’t worry as long as you’ve posted the required amount

Jack Kettering 3D

Open system is where substance can be added, closes is where no substance can be added but energy can be added, isolated system is when nothing can be added

Jack Kettering 3D

All the equations are on our equations and constants sheet!

Jack Kettering 3D

There are a bunch of articles and YouTube videos that could give you a good introduction to organic chem :)

Jack Kettering 3D

I basically just do as many practice problems as possible from the textbook

Jack Kettering 3D

I would just go to as many review sessions as possible and make sure to check your work thoroughly on exams

Jack Kettering 3D

I’m a huge blacklist and grey’s fan

Jack Kettering 3D

This is honestly such a great post thank you!

Jack Kettering 3D

That game was such a disappointment :(

Jack Kettering 3D

We should know sometime this week. Thats how it was in 14A

Jack Kettering 3D

No matter what our scores are, I know we all are working hard and most definitely deserve to have a break and celebrate getting passed that hurdle.

Jack Kettering 3D

Congrats everyone! I'm sure we all did great

Jack Kettering 3D

I honestly thought it was a lot better than I expected it to be. Still anxious to find out my score tho

Jack Kettering 3D

Inert gases do not react and therefore are not involved in the equilibrium reaction so the partial pressures of both the products and reactants do not change.

Jack Kettering 3D

To p something means you are taking the -log of something whereas if you want to go from pka to ka you do 10^-pka

Jack Kettering 3D

Since I believe we will be allowed to use graphing calculators I would suggest just graphing your equation and finding the positive zero value for x as this is much easier in my opinion.

Jack Kettering 3D

I would suggest just doing as many practice problems as you can so that you are comfortable with any types of problems that could be thrown at you on the midterm :)

Jack Kettering 3D

Always use kelvin as this is the SI unit for temperature

Jack Kettering 3D

Im weird my two favorite artists are Juice WRLD and Harry Styles haha

Jack Kettering 3D

These are periodically updated on the myUCLA grade book and CCLE so I'd check there!

Jack Kettering 3D

K for a reversed reaction is equal to the inverse of the forward reaction's k.

Jack Kettering 3D

You are already given the molarities because the quantities are given in mol*L^-1 that is the same as mol/liters or M.

Jack Kettering 3D

I'm pretty sure we're technically only supposed to be using scientific calculators however any calculator was allowed during last quarter and I'd assume that policy will remain the same.

Jack Kettering 3D

I would assume the midterms will be in the same format as last quarter during discussion section.

Jack Kettering 3D

The value you use for R is dependent on the unit of pressure you are using but I believe R will always be provided to us.

Jack Kettering 3D

Concentration by definition is moles over liters and n in the ideal gas equation represents moles and volume is liters therefore n/V is equal to concentration

Jack Kettering 3D

Concentration by definition is moles over liters and n in the ideal gas equation represents moles and volume is liters therefore n/V is equal to concentration

Jack Kettering 3D

The k value for the reversed reaction is just the inverse of k, 1/k

Jack Kettering 3D

The deadline is supposed to be on Sunday at midnight if every week but I don’t really think that’s a hard deadline. As long as you do your posts sometime you’ll get points.

Jack Kettering 3D

Grades finalized by Saturday and 10 extra points!

Jack Kettering 3D

The grades have been updated through week 9 in MyUCLA :)

Jack Kettering 3D

I’m sure Lavelle will touch base on some of the topics from 14A that we will need to know continuing into 14B at the start as he always starts with the fundamentals

Jack Kettering 3D

No curve but 10 extra points on the final which is nice :)

Jack Kettering 3D

Wow you are awesome! I aspire to be like you one day keep up the great work :)

Jack Kettering 3D

Pretty stressed but we are in the home stretch right now so I am excited about that and can’t wait for break :)

Jack Kettering 3D

What helps me best is to just look over my notes thoroughly and do a bunch of practice problems :)

Jack Kettering 3D

I’ve heard that the topics align well so it definitely isn’t a detriment to take both at the same time however if you don’t feel comfortable with doing that then I wouldn’t :)

Jack Kettering 3D

If you google vsepr chart the first one that pops up on google images should be good :)

Jack Kettering 3D

I am just reviewing my notes and doing as many practice problems as possible :)

Jack Kettering 3D

I've been wondering the same exact thing but haven't been able to figure it out!

Jack Kettering 3D

I don't believe grading distribution has been determined at this point unfortunately :(

Jack Kettering 3D

I believe they recently updated the point totals for chemistry community participation on MyUCLA. It should be at 35/50 as of now.

Jack Kettering 3D

Yes, you are correct. Any digit to the left of a decimal is counted towards being a sig dig

Jack Kettering 3D

I like going over the problems we have been doing on Sapling because I find that they are similar in difficulty to the questions we've seen on the first two exams. I also suggest going over notes as well as textbook problems.

Jack Kettering 3D

I definitely recommend switching up the different places you study to help with focusing as well as giving yourself periodic breaks from time to time to help refocus yourself :)

Jack Kettering 3D

I just take deep breaths and remind myself of how much I am well prepared to make myself more confident going into big tests like the final :)

Jack Kettering 3D

I find that shape is the easiest way to tell whether or not a molecule is polar or not so the answer to your question is yes!

Jack Kettering 3D

Hopefully sometime later this week but its possible the scores will be delayed due to the thanksgiving holiday but I hope not :)

Jack Kettering 3D

I believe we had a prerecorded lecture posted on veteran's day so I am assuming the same will happen for the Friday after thanksgiving.

Jack Kettering 3D

All of my other "online-recorded" classes have live lectures unlike Lavelle's class. I'm fairly sure that all the asynchronous style classes are listed as such. Hope that helps :)

Jack Kettering 3D

Although it is more questions, the questions are much shorter and less time-intensive therefore we won't need more time.

Jack Kettering 3D

Yes we will be expected to select the most stable lewis structure representation based on formal charge.

Jack Kettering 3D

The hybrid model is the actual observed model we see in experiments when each bond length is equivalent due to delocalized electrons. This represents a slight flaw in the way we draw lewis structures.

Jack Kettering 3D

The answers are BCl3, Br2, and C2H6. This is due to the fact that the dipoles cancel out in each molecule, so there is no net dipole moment in each, which means that there are no dipole-dipole interactions, only dispersion forces.

Jack Kettering 3D

These atoms are in period 3 and beyond and therefore have a d subshell to accommodate an expanded octet.

Jack Kettering 3D

Yes, you are correct. A triple bond has a single sigma and two pi :)

Jack Kettering 3D

I believe that in theory there are subshells past f as the mathematical models allow for such a thing but we do not have any known elements identified that have such a property

Jack Kettering 3D

To combat test anxiety I recommend taking a bunch of deep breaths before a test and I like to remind myself of all the preparation I’ve done to remind myself that I’ve got this test in the bag :)

Jack Kettering 3D

We use formal charge to determine the best Lewis for structure for a molecule as we are trying to create a structure with the best balance and stability which is measured through formal charge.

Jack Kettering 3D

You count hydrogen bonds by counting the amount of bonds you see between H and the elements F, O, and N.

Jack Kettering 3D

For there to be a hydrogen bond the hydrogen must be bonded to either Nitrogen, Oxygen, or Fluorine :)

Jack Kettering 3D

It is very confusing I agree but if you look closely on the lecture slides as well as the formula sheet we are given the v for frequency is actually italicized and represents a Greek letter whereas the normal English v refers to velocity

Jack Kettering 3D

Yes when the question is referring to an electron you use the De Broglie Equation because the electron has mass and is not traveling at the speed of light like a photon would be doing so you cannot use the equation with the constant c.

Jack Kettering 3D

My guess would be since everyone has finished taking the midterm with the makeup being held Friday we will receive our score sometime this week. Hoping its sooner than later :)

Jack Kettering 3D

Since carbon has 4 valence electrons it tends to not like to gain or lose electrons and therefore does not really ever form ionic bonds with other elements however it rather forms covalent bonds.

Jack Kettering 3D

Masses should always be in SI units which in the case of mass is kilograms. As for your second question, I believe all constants like that will be given to us during exams so no need for memorization.

Jack Kettering 3D

We definitely will not be needing to memorize anything regarding the periodic table as we will be able to use one during exams :)

Jack Kettering 3D

We will be taking the midterm on the respondus lockdown browser during our next discussion section with our TA proctoring and watching our work space therefore I believe it is a closed note test. It is multiple choice however so that is good :)

Jack Kettering 3D

N1 is the final and N2 is the initial energy level of the electron. I find this very confusing so I would suggest memorizing the equation using nf and ni to denote final and initial positions of the electron :)

Jack Kettering 3D

We definitely will not need to be able to show derivations on the test, especially with it being multiple choice. I believe he goes over derivations in lecture just to give us a better understanding of each equation and where it comes from :)

Jack Kettering 3D

I’m studying by just looking over lecture notes every night to reinforce the material as well as do as many practice problems as possible :)

Jack Kettering 3D

I don’t think we need to know anything about black body radiation, I believe the discussion with regards to black body radiation was just extraneous material.

Jack Kettering 3D

The midterm includes all the material taught in lectures through week 3 :)

Jack Kettering 3D

Protons have a mass of 1 AMU whereas electrons are considered to have a negligible mass.

Jack Kettering 3D

The unexpected outcome was the fact that even low frequency waves at very high intensities did not cause an electron to be released from the metal.

Jack Kettering 3D

I wouldn’t pay for a tutor when Dr Lavelle has provided so many free resources for those struggling with their chemistry. If after using those resources you still feel bad then I would look into a tutor.

Jack Kettering 3D

I would suggest utilizing the wealth of resources Dr Lavelle has such as step up sessions and office hours if you are not feeling confident on your chemistry :)

Jack Kettering 3D

I’d suggest utilizing the free trial Dr Lavelle has setup to access sapling for the time being.

Jack Kettering 3D

I believe Dr. Lavelle said that step up sessions are for people that are most struggling whereas office hours are for people with a bigger grasp on the material.

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