CHEMISTRY COMMUNITY

Andrew Dao 3C

Normal grading curve for A and B, but C- extends down to 50%, so 200 points total are needed to pass the class out of 400 total.

Andrew Dao 3C

Yeah he only teaches A and B unfortunately

Andrew Dao 3C

Thank you Dr. Lavelle for a splendid class even during a pandemic!

Andrew Dao 3C

Most likely next week or weekend.

Andrew Dao 3C

Yeah I think regardless keeping your notes, etc. will be very useful for plenty of things.

Andrew Dao 3C

Agreed with the above. Normal scaling for A (- at 90, + at 97), B, and C extends down to at least 50% of the class (need 200 points in total).

Andrew Dao 3C

Yeah any is allowed, their only concern is probably students storing information on graphing calculators. Since we are proctored as long as you don't do anything suspicious you need not worry.

Andrew Dao 3C

I miss the campus and seeing people just walk around. I also miss the rende quesadillas :/

Andrew Dao 3C

Yeah I don't think he does but who knows, maybe this quarter will be different depending on how well people do on the final.

Andrew Dao 3C

probably best to remember some of the trends (for example, an increase in temperature causes a right shift in the equation and therefore an increase in K)

Andrew Dao 3C

Daylight savings is such a weird concept

Andrew Dao 3C

Yes I believe it is only 14B, though there is probably some 14A material implied.

Andrew Dao 3C

I feel you. I don't think online classes is my kind of thing, and more than half my experience in college has been online.

Andrew Dao 3C

298K because that is room temperature (25 Celsius).

Andrew Dao 3C

Yes chemistry gets much easier when one just goes through the motions of problem solving and learning as you go.

Andrew Dao 3C

I liked the sapling explanations as they helped me solve the textbook problems.

Andrew Dao 3C

They have different units so you will have to use them depending on what the problem asks of you.

Andrew Dao 3C

Agreed with the above. n refers to number of moles of electrons transferred, so to find out from the equation it's best to split it into the half equations and using the charges to determine how many were moved.

Andrew Dao 3C

Personally I just remember that no matter how much you worry, once you turned in your exam you cannot do anything to change it so just take some breaths and move on.

Andrew Dao 3C

If you're into science fiction, my favorites are The Martian and World War Z. Both fantastic and explore lots of complicated points.

Andrew Dao 3C

50%, which is considered a C- in this class. So you need 200 points or more out of the 400 available, which comes from 50 sapling, 50 chemistry community, 80 for each midterm, and 140 for the final.

Andrew Dao 3C

Just finished Legend of Korra for the first time and I really liked it. It's basically a sequel to Avatar: the Last Airbender, with a more mature setting and complex villains who are somewhere in the gray area. Definitely recommend.

Andrew Dao 3C

I miss the steak quesadillas at Rendevous on the Hill :(

Andrew Dao 3C

I like finding any lo-fi playlist on youtube, just get u-block for the incessant ads.

Andrew Dao 3C

Yeah lots of studies showing that handwriting notes causes much greater remembrance of the concepts, but I have tried both and typing is much faster and for some people like me with chicken scratch handwriting much more legible.

Andrew Dao 3C

Oh it wasn't just me who felt like the second midterm kicked me in the shins ha. I think just reviewing textbook problems are your best bet, because chemistry like math is much more understandable when one just goes through the motions of problem solving.

Andrew Dao 3C

I'm very sorry about what is happening in your country. I feel like the world is getting crazier every year.

Andrew Dao 3C

I've only taken one writing class (writing 1 requirement), which was English Composition 3D. I think it was an enriching experience.

Andrew Dao 3C

Yeah I was also wondering about how the pandemic affected all of us. Hopefully some studies come out soon.

Andrew Dao 3C

Wow interesting perspective. I only know a couple of recipes for cooking so far, so hopefully as I learn more chemistry I can cook more as well.

Andrew Dao 3C

I thought structures was very fun and engaging.

Andrew Dao 3C

Sunday at midnight, though I am not sure how the time change affects that or when it will open up after the final.

Andrew Dao 3C

Just keeping a planner has helped immensely and making sure no due dates slip by.

Andrew Dao 3C

Standard conditions are 1 mol/1 atm and temperature of 25 degrees Celcius, which is 298 K.

Andrew Dao 3C

just 14BL

Andrew Dao 3C

Agreed with the above. Mainly focus on textbook questions and use the sapling just for the explanations.

Andrew Dao 3C

I think it refers to Gibb's Free energy, though I might not be right.

Andrew Dao 3C

Yes, on the final information page (found in his email) he lists them as 4 points each

Andrew Dao 3C

Yea I noticed that there was less time for the final, but I think the best strategy is probably to do the ones you know for sure first, then leave the harder/unknown ones for last.

Andrew Dao 3C

Yes, though I am sure if you did fine on the midterm then just go over the new material and you should be fine.

Andrew Dao 3C

Bond length depends on the atoms bonding, so there is really no way for you to know without actual experimentally finding it. You can usually guess bond angle though, thanks to VSEPR theory.

Andrew Dao 3C

Yeah definitely a coincidence as bond lengths heavily depend on the size of the atoms bonding.

Andrew Dao 3C

Conjugate acids and bases usually mean the molecule has donated or received a proton (H+).

Andrew Dao 3C

I don't really have any specific goals in mind, but I just hope we get less of a fiesta than 2020 was.

Andrew Dao 3C

Some classes offer extra credit for them, but for the most part they are for your feedback to the instructors, the TAs, and the new feedback for the online system.

Andrew Dao 3C

Thanks! Now to find the rest of them..

Andrew Dao 3C

All my answers involve 10 to the power of a whole integer, so I think maybe you can use rational numbers for the first part and a 10 to the (insert whole integer) for the second part. Hope this helps!

Andrew Dao 3C

Agree with the above, it is a multiple choice test so all that needs to be done is to have the technology check it and tally it up, so should be relatively soon.

Andrew Dao 3C

Just take some very deep breaths, it's going to be fine. You get in there and take the test, once it's over you will feel a giant weight off your shoulders.

Andrew Dao 3C

On sapling they said that the Balmer series involves visible light and occurs when H atoms go from an excited state to n = 2, and the Lyman series involves UV light and occurs when H atoms go from excited to n = 1. Is this a good way to distinguish the two series, or should I use the actual waveleng...

Andrew Dao 3C

Generally you want to put them as far apart as possible (so axial is the best). Like in a 4 bond and 2 lone pair shape, you put the 2 lone pairs on the axial and the 4 bound atoms on the sides, which gives you a square planar shape. This also works with trigonal biypyramidal molecules (put the 2 lon...

Andrew Dao 3C

From Dr. Lavelle's lecture it's when the coordination sphere is overall negative, for example [Ni(CN)4]^-2 is tetracyanonickelate (II).

Andrew Dao 3C

Usually sp^3 is accepted but if you want to be very specific you can add the 2.

Andrew Dao 3C

I like just visualizing the atoms like how Dr. Lavelle used the balls and sticks in lecture, so 2 bonds - linear, 3 bonds makes a triangle, 4 bonds gives you a tetrahedral (think of a pyramid with a triangle base), 5 gives trigonal bipyramidal (two pyramids with their triangle bases the exact same p...

Andrew Dao 3C

I have a slight interest in these elements at the very far end of the table. Are there any articles or journals about them? How they were synthesized, etc.

Andrew Dao 3C

Most likely light hibernation. Sprinkle in some tv shows and food. I don't think I can do much else with the lockdown in place :/ .

Andrew Dao 3C

I think any music that is on the calm side and with no lyrics/words would definitely help. I like using the ambient music playlists on youtube (get u-block origin so you aren't bombarded by ads).

Andrew Dao 3C

There was a sapling problem on the Week 10 homework where it was shown that Sr(OH)2 is a stronger base than KOH, so I think that since the group 2 elements bond to two hydroxide molecules each, they are stronger than group 1 elements, which bind to only one hydroxide molecule.

Andrew Dao 3C

I think the iron is making two covalent bonds with the nitrogens (solid lines) but also making 2 coordinate covalent bonds with the other two nitrogens (dotted lines). Those do not count towards its oxidation state, hence it is +2.

Andrew Dao 3C

Usually the molecules that are tetrahedral involve an atom that makes 4 bonds and has no lone pairs. For example, Carbon Tetrachloride (CCl4) involves a carbon in the center surrounded by the 4 chlorine atoms. Since carbon makes 4 bonds and has no extra lone pairs, the shape is tetrahedral for maxim...

Andrew Dao 3C

Thank you Dr. Lavelle! I greatly appreciate the immense effort you and all the TAs and UAs have put into making this course very straightforward and easily accessible to all your students. I can't wait for next quarter!

Andrew Dao 3C

I believe that Be and Mg have small bonds that are very strong and hard to break in order to be strong bases, similar to how the halogens are all strong acids except for hydrofluoric acid (HF), which has a small and strong bond.

Andrew Dao 3C

My favorite kids show is definitely Star Wars: The Clone Wars. It fleshed out the movie characters and made most of them more nuanced. Rebels was also nice, though not on the same level. On the opposite spectrum, I binge watched Breaking Bad over the summer, and I actually really liked it, despite w...

Andrew Dao 3C

Yeah I think we just need to know the trend of electronegativity along the periodic table, which follows electron affinity in that it increases the closer one gets to the top and right side of the table (almost noble gas).

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