CHEMISTRY COMMUNITY

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A catalyst only affects the reaction rate. Products, reactants, equilibrium constants etc would not change.

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https://www.sciencedaily.com/releases/2 ... 100629.htm

Since we've been talking about Catalyst in class, here's an interesting article.

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https://www.sciencedaily.com/releases/2 ... 110645.htm

A shocking way of healing wounds.

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How did the hipster chemist burn his hand?
He picked up his beaker before it was cool.

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Why do chemists find working with ammonia easy?
Because it’s pretty basic stuff.

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

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https://www.google.com/search?q=chemistry+jokes&rlz=1C1CHZL_enUS737US737&tbm=isch&source=iu&ictx=1&fir=nqu933a92n6OtM%253A%252CnAThXZM2Vmq5BM%252C_&vet=1&usg=AI4_-kT0J-I8CWv_qn2XCfz6O4xx3RMeOA&sa=X&ved=2ahUKEwi1_NHY2YrhAhVoHzQIHRI_DWsQ9QEwBnoECAAQDg#imgrc=jtdNoMy...

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The van 't Hoff equation can be used to explore the changes in state functions in a thermodynamic system

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Think of Le Chatelier's Principle. If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change.

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Anything you would want graded must be in pen.

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I'm sure it's the same. As long as you have 30 posts by the end of the quarter you should get full points.

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What made you want to go to med school?

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Does anyone know if the answer key to the final will be posted?

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Thank you!

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https://www.sciencedaily.com/releases/2 ... 084905.htm

Here's some cool crystals that emit light when heated.

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https://www.sciencedaily.com/releases/2 ... 123632.htm

Learn how DNA and RNA copying has imrpoved!

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I find that looking at the examples in the book really help understand how each concept is applied. Doing the hw problems after covering the concepts also help.

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I believe they just [censored] all your posts at the ended of the quarter. I'm not quite sure how it works though because I realized that I was posting the Chem14A instead of 14B but they seemed to be the same page.

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Lavelle doesn't teach 14C?

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Organic chemistry is difficult. Those who study it have alkynes of trouble.

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Making bad chemistry jokes because all the good ones Argon

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Why do chemists like nitrates so much?
They're cheaper than day rates.

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Did you know that you can cool yourself to -273.15˚C and still be 0k?

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Catalyst should only affect the chemical rate of the reaction. The catalyst itself is not altered nor is the equilibrium. I don't think they affect the reactants or the products.

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The acid dissociation constant, Ka, is a quantitative indicator of the strength of an acid in a solution. pKa is simply the negative log of ka.

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It's in Kelvin.

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It's in Kelvin.

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I know we just took our final, but I was just curious as to when final grades will be posted.

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Will cisplatin be apart of what we need to know on the final?

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The bond strengths of acids and bases are implied by the relative amounts of molecules and ions present in solution. Strong acids have mostly ions in solution and weak acids exist mostly as molecules with only a few ions in solution.

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I would go based off of the ones Lavelle has on his website.

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Will we be test on 2nd Ionization energy? I was working on a problem in Ch 2 (6th edition) and found that none of the 2nd ionization questions was listed on the hw.

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Anything covered in the HW is material the test will cover. So yes.

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According to the Pauli Exclusion Principle which states that no two electrons may occupy the same quantum state at the same time, the electron spins are oriented in opposite directions. This causes the magnetic fields of the electrons to cancel out; thus there is no net magnetic moment, and the atom...

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I would practice both just in case.

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E=hv!! So substitute planck's constant for h and set that equation= to work function + Ek

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i believe you do. They form other bonds to achieve stability.

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Lavelle always provides a periodic table for exams so I doubt it.

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Hilda Sauceda 3C wrote:does anyone know is there is gonna be a study guide?

There's a practice final posted somewhere in the chemistry community created by one of the UAs. They said it would closely resemble Lavelle's exam.

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This article discusses a new battery concept based on fluoride ions that could potentially expand lifespan so we would only have to charge our phones twice a month!!

https://www.sciencedaily.com/releases/2 ... 141209.htm

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Here are 15 amazing chem facts!

https://www.zmescience.com/science/chem ... try-facts/

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Khan academy is also very helpful!!!

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Khan academy is also very helpful!!!

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I think it would be F2^-1, but not quite sure.

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SO3 is a non-metal oxide and non-metal oxides are acidic in nature. The aqueous solution of acidic oxides donates protons, therefore SO3 is an acidic oxide

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the greater the pKb value the weaker the base. In this case hypobromite has the smallest at 5.31 compared to morphine's 5.79, therefore being the strongest.

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I'm trying to check my answers for worksheet 4 but I couldn't find the answer key anywhere. Was there ever one?

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Thank you Ashley! I agree, Lavelle is a great professor and he's extremely helpful!

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Are their specific units that we should be using? I usually just follow the units given in the problem, but as I was working through one the answer was given in mL instead of L.

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i've been reviewing the discussion worksheets and I have found those very helpful.

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Will the Constants and Formulas given be the same as the previous tests/midterms? Or will it provide more information?

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It must be written in pencil if you're think you will need to ask for regrade, but this is a final so i doubt it will matter.

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I have my roommates old course reader which is basically Lavelle's lectures condensed. I find it helpful to align my notes/examples given in class with the course reader as a refresher of what was covered in lecture. For a better understanding of the concepts I read that specific chapter in the text...

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Does anybody know how many questions will be on the final?

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Will the final be similar to this practice final?

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THANK YOU SO MUCH!!! THIS IS DEFINITELY A HUGE HELP!!

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Two chemists go into a restaurant.
The first one says "I think I'll have an H2O."
The second one says "I think I'll have an H2O too" -- and he died.

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Q: What do you do with a sick chemist?
A: If you can't helium, and you can't curium, then you might as well barium.

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

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I’m assuming they’ll provide a periodic table like they have in the test. I doubt they make us memorize all the elements.

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So the midterm should be formatted just like the test?

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Do we know how many questions from each section will be in the test? Like how many from the fundamentals, quantum, and chemical bonds? I know there’s 8 but how is it going to be divided?

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Do we know how many questions from each section will be in the test? Like how many from the fundamentals, quantum, and chemical bonds? I know there’s 8 but how is it going to be divided?

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For problem 23 in chapter 2, after writing the ground-state electron configuration for each element it asks us to predict the number of unpaired electrons. How exactly do we know which ones will be unpaired?

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Will the test result be posted on CCLE or will we have to wait to get our test back?

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When there is a decimal in the number always count from left to right starting with the non zero number, any zero in between the nonzeros should still be accounted for. However, if there is no decimal then count from right to left starting with the first non zero number.

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What's the late policy for hw? I couldn't find it on Lavelle's syllabus, maybe i just missed it but I didn't realize hw was now being collected during discussion.

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