CHEMISTRY COMMUNITY

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using this as a reference

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burnt out is not even the words it is beyond that.

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I decided to take a break from Chem and ill be taking Psych 15, 100A, and Spanish 3

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Snowfall is slowly becoming a favorite. Grey's Anatomy is a classic though

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Are you made of Copper and Tellurium?

Because you are CuTe

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I am a first year and I am looking forward to meeting new people and seeing new faces.

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Here is the link for this weeks review sessions: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14B/Chem14B_Week_10_Review_Sessions.pdf For the final study guide, I would recommend looking at the outlines for the topics and make sure you can do problems related to the bullet points T...

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Most definitely have been trying to get in about an hour of outdoor time before I begin any school work. and then taking breaks in-between after completing assignments.

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50 points maximum

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Reviewing textbook problems are practicing some of the homework questions help. UA sessions and office hours also help.

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KClO2⟶KCl+O2 As an uncombined element, O2 has a oxidation number of 0. KClO2 and KCl are both ionic compounds. K in both compounds will have a charge of +1. That means Cl will be -1 in the KCl compound. However, this is not the case for KClO2. Since oxygen will have a charge of -2 when it is in a c...

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Using this as a reference.

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work consistently on the homework problems and attending UA sessions really helped me I struggled a bit on the 14a final but I felt a bit more comfortable knowing I had studied and did my UA sessions.

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Between tonight and tomorrow we should know.

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I like to sit outdoors either in my yard at the park or the beach and just reflect not think about anything to stressful and just relax a couple of days before a major final, exam, or quiz. It is really relaxing and soothing even listening to waves.

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I believe it is the same as 14a as long as we reach 50 by the end of the quarter.

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Exercising my body I try ro work out 2-3 times a week before my lectures so around 6am-10am I try to implement a good work out. Exercising my mind I occasionally will play brain busters or I would read a couple of motivating books. I haven't had much time to read this quarter though.

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I have so many but Mac n Cheese is most definitely top 2 and it is not 2.

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its a bit challenging but I have currently tried this work watching my lectures M and W and focusing on actual work T and R and it has been working great so far.

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I like to hear chemistry puns.....

periodically.

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Using this as a reference.

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Most definitely the textbook problems and office hours and UA sessions.

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I am also feeling nervous only because I have done the work the practice problems etc. But I just can't seem to grasp some of the concepts.

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UA sessions are really helpful but also finding YouTube videos are also beneficial.

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Darren1j wrote:How much of 14B is in 14C. Would I be at a disadvantage if I wait to take it in the fall instead of this spring?

I have the same question so I am just going to use this as reference.

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Using this for reference.

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Top 5
1. Greys Anatomy
2. Bones
3. Private Practice
4. House
5. NCIS

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using this for reference

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Thank you for the tips !

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using this for reference.

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What is the show cesium and iodine love watching together?
.... CSI

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Sukhkiran Kaur 3I wrote:I think last quarter if u missed a week u could do double the posts next week and it would make it up in the final count.

Same I remember this from last quarter

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Using this as a note of reference for memory

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I felt it was a bit tricky and more difficult. However, I do get test anxiety so that could have also been it.

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I believe we should hear something from him via email in a few days abut how we did and the results.

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I listen to all type of genre's, but R&B is top so the Jhene Aiko, Summer Walker, and SZA. Then hip hop YoungBoy NBA, Lil Baby, Lil Durk are my top 3.

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Thank you so much !

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Just because this is from tiktok I Like Gold but the A is silent :)

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Using this as reference because I am stuck on 5 as well.

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It will most likely be the same as 14a just to confirm though I would check with your TA during discussion. There will be a use of two devices one (phone or iPad) to use zoom and the second device a computer to use respondus.

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Using this as reference since I am stuck on #2 as well.

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Depending on TA, so best advice would be to ask however previously it was 5 post per week due every Sunday evening by 11:59pm

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I think Going over the outlines a few weeks in adavance and completing the textbook problems until you can master them help

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Kristina Krivenko 3I wrote:Hi! Midterms will take place during your Friday lecture on weeks 4 and 7.

Here's the link to the Exam Schedule posted on Dr. Lavelle's website that outlines that: https://lavelle.chem.ucla.edu/wp-content/supporting-files/Chem14B/Chem14BTestSchedule.pdf

Thank you so much !

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Juliana Rosales 1H wrote:I am literally having the same problem. I have the first part of the problem solved but I can't figure out where I am going wrong on the second part

Same using this as a reference in case someone replies with help

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I think any calculator in regards to graphing and scientific would be fine

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There are a ton of helpful options group engaging and individually, group wise there are PLF sessions, UA sessions, office hours, and workshops. Individually you can watch you tube videos or khan academy. As well as completing the assigned textbook problems, continuing to practice homework problems ...

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Has anyone else dealt with the sapling saying $90 instead of the $72 and was not able to use the code from the access card last quarter?

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Using this as a reference

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I think prating the homework problems and the text book questions he has on the outlines are also beneficial. Along with the many hours for office hours Discussion PLF Sessions UA sessions and workshops. Along with you tube videos

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Sapling homework is always mandatory. I believe the Sapling problems for the chemical equilibrium outline are due next Sunday (1/17). However, textbook problems aren't necessarily mandatory, but HIGHLY recommended to complete. I took 14a last quarter with Lavelle and I found the textbook problems t...

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Using this as a reference!

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Thank you for this ! Really helped.

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Chelsea_Guzman_1B wrote:Planning out a schedule of topics to study over helps me feel less overwhelmed. Taking breaks and changing settings also helps reduce my anxiety. Only a few more days left, you got this!

This right here ! 110%

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Great to know ! Thank you .

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Using this as reference !

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the Organic Chemistry Tutor as well as khan academy both are really good and have great explanations.

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They are back working now

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I am creating flash cards for the important concepts, key terms, and formulas. I am also attending as much UA sessions office hours and PLF sessions as possible. Using UA worksheets and finding practice exams.

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Color coding flashcards !!!

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Using this asa reference for homework 10

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Hi! A simple way to determine coordination number is just to see how many ligand bonds are formed with the transition metal. It's not exactly the number of atoms that it's bonded with because some of them can be polydentate, so just looking at the number of bonds formed should give you the coordina...

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Yes c is always the speed of light.

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Thank extremely helpful !

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The molecule does not dissociate in water very well, since Fluorine is the most electronegative element creating a tight bond between Fluorine and Hydrogen.

As mentioned before.

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Faaizah Arshad 1E wrote:Here is the link to the Final Review sessions: https://lavelle.chem.ucla.edu/wp-conten ... ns_14A.pdf

You can also locate it on the right of Professor Lavelle's Chem 14A website.

Thank you ! greatly appreciated.

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I would tell another chemistry joke…

…but all the good ones Argon.

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Oxygen, hydrogen, sulfur, sodium, and phosphorous walk into a bar.

“OH SNaP!” says the bartender.

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Why did the bear dissolve in water?

It was a polar bear

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Someone threw sodium chloride at me.

I yelled, “That’s a salt!”

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Under test and exam schedule on Dr. Lavelle's website, it says that the final will be on Sunday December 13 from 11:30am – 1pm. There is also an alternative time for international students. Hope this helps! :) Does this mean that since we are taking it between 11:30-1 as a entire class that it'll b...

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Hi! One of the UA worksheets (I believe Riya's Week 5 worksheet) explains that the ionization enthalpy of Ga is higher than Al because the 3d-subshell is unable to completely shield the valence electrons. This also applies to Ti having a higher ionization enthalpy than In (ineffective shielding of ...

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chinmayeec 3L wrote:Dr. Lavelle sent an email saying that students must keep scheduled Chem 14B class time open because we will have tests during class time. So yes, you shouldn't overlap it with another lecture.

Hope that helps!

Extremely helpful thank you.

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If anyone is interested in creating a study group let me know ! I think its beneficial for the additional help.

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Using this for reference once an exact answer is posted.

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Under test and exam schedule on Dr. Lavelle's website, it says that the final will be on Sunday December 13 from 11:30am – 1pm. There is also an alternative time for international students. Hope this helps! :) Does this mean that since we are taking it between 11:30-1 as a entire class that it'll b...

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The lone pair being present causes it to be polar

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I think looking at previous exams and materials from before help as well as putting a time limit on is also helpful.

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If we stacked up with 40 from before, do we need to do more to have them be from this week? I think so. I think we need to have at least five posts per week Hi! This is right, it is 5 points per week. So you are supposed to have a total of 40 points by the end of the week. Very helpful! Thank you

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Ava Nickman wrote:How many multiple choice questions is it? Do we know?

We have not been told yet how many questions will be on it.

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Helena Xu 1I wrote:
AHUNT_1A wrote:Does anyone know if we will be on zoom for the final of if it is just respondus?

Since both midterms were proctored over zoom and respondus, I think we will most likely also be on both because the format of the final will be similar to that of midterms.

Thank you !

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Since it is always preferred that the lowest energy structure, it is the most stable structure. So yes.

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Using this as a reference as I begin to study for the final. All answers seem to be extremely informative.

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Like what Sophia said, calculating the formal charge and counting the number of electrons around each atom helps in finding the electrons in the middle. I like to see how many valence electrons are needed to fulfill the electrons in the middle and count the bonded electrons as those needed electron...

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When lone pairs occupy equatorial positions, it only repels two axial bonds at 90º, whereas if the lone pair occupied the axial position it would interact with 3 equational bond's. Therefore, lowest energy is achieved when lone pairs are in equatorial position because there is less repulsion. I sec...

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Edwin Liang 2I wrote:I think the lectures are recorded again because it saids "Online - Recorded"

yes they are.

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There is a structure w/ C=C=C & 2 H atoms attached to each end, a structure w/ C-C=C & 3 H atoms attached to the left end & 1 H atom attached to the right end, and a structure w/ a ring of C atoms. Hope this helps! Extremely helpful thank you! Also using this a s a reference to come bac...

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Also does anyone think we will have to update respondus again before the final?

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If it were linear and the two lone pairs cancel its forces out, then the angle between the lone pair and the bond would be 90 degrees, and electron repulsion wouldn't allow that. When there are four regions of electron density, the electron geometry is tetrahedral and the bond angles are 109.5 degr...

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Does anyone know if we will be on zoom for the final of if it is just respondus?

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Either CCLE in theft column towards the bottom or MyUCLA portal under "Classes" then selecting "Exam and Homework Grades". I think the most helpful way to do so is adding up the points you have received and implementing them out of Lavelle's grading rubric so HW (50 pts) Discussi...

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John_Tran_1L wrote:It increases from left to right and from down to up. In other words, electro negativity increases as you approached to the top right corner of the periodic table.

simple but helpful explanation. Thank you.

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As there is an increases in electronegativity you would move up diagonally and to the right on the periodic table.

Hope this helps!

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Jayden_Yamasaki_2J wrote:An example would be in a square planar molecule. All 4 of the surrounding atoms lie in the same plane which is different from a tetrahedral shape where the 4 surrounding atoms are not all on the same plane so its 3D shape is not flat.

good example I was able to visualize what you explained.

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atoms in a molecule are in the same plane, for example a 3D atom in the same flat region.Place the molecule flat on a table, everything flat is coplanar and would be at the same height.

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Michael Sun Dis 3G wrote:NO is linear, and polar, as there exists a dipole due to the difference in electronegativity between N and O. The unpaired electron does not affect its shape, as a molecule containing two atoms must be linear.

Extremely helpful! Thank you using this as a reference.

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yes, we will have 40 points by Sunday being this is week 8 and post are 5 points for the week!

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Using this as a reference to trace back to once someone replies.

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Hannah Rim 2D wrote:Hi! For our final exam, we probably will have to know since we'll be going over naming soon. As of now, I don't think you need to stress about it since it's something we haven't learned yet. It might help to get a head start though (: Hope this helps!

very helpful! Thank you.

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Lone pairs are also considered as regions of high electron density, and must be accounted for when determining the electron arrangement. They are however not taken into account when determining the molecular shape, as only the positions of the actual atoms in the molecule are considered. Extremely ...

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