CHEMISTRY COMMUNITY

Banik_Housepian_2K

Not particularly related to the final itself, but for future reference - will we still have access to Chemistry Community after this quarter ends? Chem community is a public site, so you do not even need an account to see the forum posts and replies. you can see posts, but if our login does not wor...

Banik_Housepian_2K

Sophia Rawson 1C wrote:I could be wrong but I believe I drew cyclopropane with an ethyl substituent, cyclobutane with a methyl substituent, and cyclopentane

You are correct

Banik_Housepian_2K

Teddy_Rosenbluth wrote:Would vinyls be considered functional groups and therefor we don't need to know it for Quiz 3?

I had this question as well, but im pretty sure it wont be on the quiz.

Banik_Housepian_2K

Is there a reason why number six's answer has three significant figures despite the given concentration 0.35M having two significant figures? Do we not bother with sig figs when ln is involved? My TA told me today that there are some weird rules that apply to sig figs with logs and natural logs and...

Banik_Housepian_2K

Do you guys know if the review session is gonna be recorded today or not?

Banik_Housepian_2K

chris2E wrote:Is there a reason why number six's answer has three significant figures despite the given concentration 0.35M having two significant figures? Do we not bother with sig figs when ln is involved?

Number 6's answer is 0.30M, that's 2 sig figs. And there is no ln involved

Banik_Housepian_2K

This was so helpful! thank youu

Banik_Housepian_2K

I'm down

Banik_Housepian_2K

The entropy of the system decreases while the entropy of the surroundings increases. This is because we had 2 reactants compared to 1 product, and thus the entropy of the reactants is higher than that of the product.

Banik_Housepian_2K

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

Banik_Housepian_2K

I like chemistry jokes periodically.

Banik_Housepian_2K

He also announced that the midterm will cover up to the end of electrochemistry, just in case you were not informed yet.

Banik_Housepian_2K

What kind of fish is made up of 2 sodium atoms?
TuNa

Banik_Housepian_2K

I'm fairly certain that most of the important ones that we will need will be on there and if not,it would be ones that we can derive.

Banik_Housepian_2K

Q: What do you call a clown who's in jail?
A: A silicon.

Banik_Housepian_2K

And this equation works because isothermal means that the temperature stays constant, thus we don't need an initial and final temperatures, the initial temp will do.

Banik_Housepian_2K

I believe it has to do with the equation: deltaS=nRln(V2/V1)

Banik_Housepian_2K

Today we learned how to use the integral to calculate the work done under constant pressure.
I was wondering whether we can use integrals to calculate work if the pressure is not constant, and if so, how?

Banik_Housepian_2K

Chemistry is like cooking, just don't lick the spoon.

Banik_Housepian_2K

you're a 10?
Maybe on a pH scale,
cause you're basic.

Banik_Housepian_2K

you also have to think about the fact that electrons have the same charge and we know that alike charges repel and it would be very hard to get electrons to collide.

Banik_Housepian_2K

take all your lame chemistry jokes and Barium.

Banik_Housepian_2K

getting closer to the final exams, always remember to be like a proton and stay positive.

Banik_Housepian_2K

the H3- is electron-donating relative to hydrogen and it donates electrons to the carboxyl group which makes it more negative. This causes the acid to be weaker, because the proton now has to be separated from a more negative conjugate base. likewise, CH3CH2- is more electron-donating than CH3-, and...

Banik_Housepian_2K

I believe in the formula the order does not matter, but when naming you must name in alphabetical order.

Banik_Housepian_2K

I believe they must be excluded from the ice box because they are not applicable in equilibrium, only gases and aqueous substances are.

Banik_Housepian_2K

How can you tell the difference between a chemist and a train driver?
ask them to pronounce unionized...

Banik_Housepian_2K

sodium sodium sodium sodium sodium sodium sodium sodium sodium
BATMAN!

Banik_Housepian_2K

What is the chemical formula for banana?
BaNa2

Banik_Housepian_2K

it is the atomic number which is the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.

Banik_Housepian_2K

A mistake that i saw a lot of people make with this problem was that they drew the lewis structure in the most stable form(which we are always told to do) which would result in more than an octet for the central atom. But the question specifically asks us to use the octet rule, meaning no atom can h...

Banik_Housepian_2K

It cannot have an expanded octet.

Banik_Housepian_2K

What do you call an acid with an attitude? An a-mean-oh-acid.

Banik_Housepian_2K

I have many chemistry jokes. I'm just afraid they won't get a good reaction.

Banik_Housepian_2K

Dear Elle,
I'm a bit unclear about this as well. i believe that it does not matter where it is removed from because once it is removed and the lone pair is put, the other atoms will move and arrange in a way where they are as stable and far away from each other as possible.

Banik_Housepian_2K

Dear Emerald,
I understand that there are delocalized electron, which is why the energy is lower, but how does the electrons being delocalized result in a lower energy?

Banik_Housepian_2K

Hello Matt, I was wondering about that as well. For instance i know that as we move down the periodic table the radius increases due to the addition of electron shells, but the charge of the nucleus is also greater meaning it pulls the electrons in with a greater force. The trends are great for gene...

Banik_Housepian_2K

what if the waves are neither lined up trough to peak, peak to peak, or trough to trough, and are rather lined up somewhere in the middle. then are they constructive or destructive? how does this work out?

Banik_Housepian_2K

Is the energy what determines whether or not a wave is harmful to humans? or does it have to do with the frequency or wavelength?

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