CHEMISTRY COMMUNITY

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The main difference between steric strain and torsional strain is that steric strain cannot be lessened by rotating the molecule around a bond whereas torsional strain can be lessened by rotating the molecule around a bond.

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Hope your final went great!

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The deadline is March 16, Tuesday morning 9am

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I believe you can sign your email up at the end of the class evaluations and they will be in contact with you

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A little bit late but thanks for making this available

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I just wanna say THANK YOU DR. LAVELLE. You made online learning not so bad and were always prepared. This is probably the most I have learnt in a chemistry class and to that I say THANK YOU!

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Yeah like a lot of people have stated I believe this depends on how lenient your TA is

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Yeah I believe but I'm not sure you can email your TA to conform

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Hope everyone enjoys their break and takes this time to relax. It was fun learning with all of you.

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Does anyone have any good tips for preventing rice from getting stuck to the bottom of the pot? Usually, I would recommend getting a nonstick pot Where is an amazon link where you can get one cheap: https://www.amazon.com/Utopia-Kitchen-Quart-Nonstick-Saucepan/dp/B06Y5KZCB2/ref=sr_1_6?dchild=1&...

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I think this is cool and reminds me of an article I read once that talks about how even slicing an apple sets off chemical reactions that change the color of the apple's flesh. I think it's very interesting how chemistry directly relates to cooking and they are a lot of other scenarios.

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Because heat represents the transfer of energy to or from a system as a result of temperature

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Heat is the transfer of energy due to a temperature difference while enthalpy is the change in the amount of heat in a system at constant pressure

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They are basically the same thing but vapor is the chemical way of saying something is in gas phase

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The oxidation number is the number assigned to an element in chemical combination

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Goodluck on the Final Everybody!!!

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You can use the van't hoff equation to indirectly solve for the enthaply of a reaction

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Add the Van't hoff equation to your equation sheet

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The equilibrium relationship can be seen in Hemogolobin-oxygen and also in moods rings and color changing nail polish

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The Van't Hoff equation is usually used to explore the changes in state function of a thermodynamic system

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I think there will be equal distriubtion from each section like last quarter

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Chem 14B Works!

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My tip would be to watch a lot of review videos like on youtube or Khan academy

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I am too sure about this either but I believe it's better to be safe than sorry so ask your TA

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I believe the lectures end on Wednesday and the rest is just review for the final

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Thank you Dr. Lavelle you are an amazing teacher and I hope I get to be in another one of your classes in the future

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The order of a reaction is usually through experiments and I believe he also talks about in the week 9 lecture

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Thank you so much for this advice

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Q: What is the difference between chemistry and physics jokes
A: Chemistry jokes can be funny periodically but physics jokes have more potential

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Q: What is iron man's favorite amusement park ride?
A: The ferrous wheel

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Q: What's a chemist's favorite type of dog?
A: A Laboratory retriever

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Q: How did the hipster chemist burn his hand?
A: He picked it up before it was cool

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Q: Why do chemist find working with ammonia easy
A: Because it's pretty basic stuff

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Q: If H2O is water and H2O2 is hydrogen peroxide, what is H2O4
A: Drinking, Bathing, and lots of other daily activities

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Q: Did you hear the joke about coablt, radon and yttrium
A: Nevermind it's to CoRnY

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Q: I tried writing jokes about the periodic table
A: But I realized I wasn't quite in my element

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Q: What should you do if no one laughs at your joke
A: Keep telling them until you get a reaction

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Q: What did Michael Jackson say after he inhaled Helium
A: He He

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This is a really interseting article that shows a new enivornmental friendly way scientist are removing chemicals from water

http://www.sci-news.com/othersciences/c ... 08595.html

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This is a really interesting article that talks about an underestimated source of pollution in marine microplastic

https://www.sciencedaily.com/releases/2 ... 113319.htm

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This is a really interesting article talking about scientist are innovating and creating a new material that self-assembles with potential applications in health and electronics

https://chemistry.news/2021-02-17-chemi ... erial.html

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This is an article that talks about how this university team is trying to reduce the number of vaccines that are going to waste

https://www.chemistryworld.com/news/uni ... 48.article

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This is a really interesting article that talks about how we can fabricate the future with a new environment-friendly method of polymerization

https://www.sciencedaily.com/releases/2 ... 100846.htm

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This is a really interesting article on how chemist is trying to boost boron utility

https://www.sciencedaily.com/releases/2 ... 142428.htm

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This is an interesting article that talks about Princeton being fined for violations when exporting controlled pathogens

https://www.chemistryworld.com/news/pri ... 18.article

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This is a really interesting article that talks about the secret of catalyst that increases fuel cell efficiency

https://www.sciencedaily.com/releases/2 ... 122448.htm

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This is a really interesting article that talks about how physics camp has been proven for benefits for highschool girls

https://www.sciencedaily.com/releases/2 ... 113157.htm

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This is a really interesting article that talks about how Ghosts of past pesticide use can haunt organic farms for decades

https://www.sciencedaily.com/releases/2 ... 142622.htm

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Thank you for this advice

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Thank you for the advice

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What I usually recommend before finals is just to try and calm down don't try to overstudy and just have hope that you have a good recollection of the topics taught in the class

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I am very happy that I got into the class

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I am very happy that I got into the class

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This is a really interesting article on how scientist are using chemistry to turn paper into a flexible human-powered keypad

https://www.sciencenewsforstudents.org/ ... red-keypad

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Hi, Dr. Lavelle
I wanted to say thank you for a good quarter of learning great chemistry. Thank you for helping us in anyway could and I can't wait to take 14b with you next quarter.

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Polyprotic bases are bases that can accept at least one H+ ion or proton in acid-base reactions while polyprotic acids are acids that are able to donate more than one H+ proton

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Q: How did the molecular spy introduce himself?
A: My name is Bond Covalent Bond. VSEPR

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Old Chemist never die they just stop reacting

Q: What do you call a tooth in a glass of water?
A: A one molar solution

Q: Why do chemists enjoy working with ammonia?
A: Because it's pretty basic stuff

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Stereochemistry deals with the spatial arrangement of atoms and groups in a compound and its relation to the properties of the compound.

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Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equally between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out

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The pH formula is pH = -log10[H+] and [H+] = 10^-pH

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I believe as the bond dissociation energy increases the difference in the electronegativities of the bonded atoms increases and as the electronegativity of the atom “losing” the electron increases, the bond dissociation energy increases.

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Don’t trust atoms, they make up everything Q: Have you heard the one about a chemist who was reading a book about helium? A: He just couldn’t put it down Q: Why do chemists like nitrates so much? A: They’re cheaper than day rates. Q: I asked the guy sitting next to me if he had any Sodium Hypobromit...

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This is a really interesting article that talks about how scientist breaking the rules of chemistry helped them to unlock a new reaction

https://www.sciencedaily.com/releases/2 ... 124113.htm

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

Q: Did you hear the one about cobalt, radon, and yttrium?
A: It was CoRnY.

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When compounds like sulfur dioxide and nitrogen oxides are released into the air and when they mix with water, oxygen, and other chemicals to form acid rain. Acid rain can be reduced by producing energy without fossil fuels. People can use renewable energy resources such as solar and wind power inst...

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When compounds like sulfur dioxide and nitrogen oxides are released into the air and when they mix with water, oxygen, and other chemicals to form acid rain. Acid rain can be reduced by producing energy without fossil fuels. People can use renewable energy resources such as solar and wind power inst...

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Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. They can rise very high into the atmosphere, where they mix with water, oxygen, and other chemicals to form acidic pollutants

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Acid rain is basically acid deposition and it refers to the many ways in which acidity can move from the atmosphere to Earth's surface. he gave some examples of this in class,

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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) Discuss...

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If an element possesses polar and nonpolar characteristics what is it called?

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Is it possible for an element to possess polar and nonpolar characteristics?

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Does anyone know when we are going to get our Midterm 2 results? Is it going to be before Thanksgiving or after?

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Lea Ozdere 1A wrote:On CCLE for each class once you get to your class site, you can scroll all the way down on the left tab and find "Grades." You can also check on myUCLA (Classes > Exam and Homework grades), although I've heard those aren't always updated or accurate.

Thank you! This helps

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It is because they are all negatively charged, they repel each other. They will spread out as far away from each other as they can possibly get. Not that they are no longer in the original s and p orbitals that were present in the oxygen atom. The best theory to help you understand this would be the...

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

Q: Why can you never trust atoms
A: They make up everything!

Q: Anyone know any jokes about sodium?
A: Na

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I don't think there is really a length by which they differ

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The oxidation number is the difference between the valence electrons in the isolated atom and the valence electrons in the bound atom. The lone pair electrons belong entirely to the atom on which they reside. Shared electrons between identical atoms are shared equally. Shared electrons between diffe...

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In general, ionic radius decreases with increasing positive charge. As the charge on the ion becomes more positive, there are fewer electrons and the ion has a smaller radius. But you can not predict an ion size based on it's charge

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A Lewis acid is any substance that can accept a pair of nonbonding electrons. It is an electron-pair acceptor
A Lewis base is any substance that can donate a pair of nonbonding electrons. It is an electron-pair donor. In other words, a lewis acid accepts and a lewis base donates.

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Enjoy the Jokes:

What's the dullest element? Bohrium!

Why does a hamburger have less energy than steak? Because it's in the ground state!

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Thank you for this!

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When are we taking the second midterm?

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Q: What is the show cesium and iodine love watching together?
A: CSI

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

Q: What is the chemical formula for "banana"?
A: BaNa2

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This is a really good article that talks about a material scientist found that bruises like skin

https://phys.org/news/2020-11-material-skin.html

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For anyone struggling with this, I usually use Khan Academy, whenever I don't feel like reading the textbook and also go to office hours

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Where can we look at our overall grades in the class?

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Thank you!!!

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What does it mean, if someone question is endorsed?

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When do you get our midterm scores back and is there going to be a curve on this midterm

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If you are in the AAP program you can get a personalized tutor to help you with chemistry

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This is a very brilliant article that talks about MIT chemistry professor Yogesh Surendranath work with developing novel electrochemical reactions to decarbonize our energy systems.

https://scitechdaily.com/developing-nov ... y-systems/

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Thank you for this advice, this really eases my mind especially after taking the first midterm

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I believe you can see your points wherever you can view your grades

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I believe you can see your points wherever you can view your grades

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This article is about Chemists at the University of Bayreuth that developed a new material to separate CO^2 from industrial wastes. I thought it was cool and decided to share it. https://www.chemeurope.com/en/news/1168335/climate-protection-chemists-develop-new-material-for-the-separation-of-co-from...

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I usually use a stress ball and it really helps calm me down

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Honestly, I have been going through the module videos again and Khan Academy really helps too.

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Can I use my phone as a webcam for the midterm or do I have to buy a new webcam

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https://www.aliexpress.com/item/4001059071433.html?src=google&albch=shopping&acnt=494-037-6276&isdl=y&slnk=&plac=&mtctp=&albbt=Google_7_shopping&aff_platform=google&aff_short_key=UneMJZVf&&albagn=888888&albcp=9765953191&albag=103352390521&trgt=...

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