CHEMISTRY COMMUNITY

Kayla Booker 1F

I also struggled with studying last quarter and I think for this quarter is would be a good idea do textbook problems and also go to step up sessions to test what you already know.

Kayla Booker 1F

Yes, I believe that’s true as he announced last quarter that students should resolve any time conflicts with lecture

Kayla Booker 1F

I was actually confused on the same thing

Kayla Booker 1F

Yes, you solve for Kp the same thing way as Kc

Kayla Booker 1F

I don’t think they have to be in mol/L, they just all have to have the same units but I prefer to use mol/L

Kayla Booker 1F

When you reverse the reaction, k is inverted so it would then be 1/k or k^-1

Kayla Booker 1F

You would use Kp.

Kayla Booker 1F

I agree, that would be so helpful for people that have classes during the sessions.

Kayla Booker 1F

The temperature should be in Kelvins so that the units will cancel out.

Kayla Booker 1F

How do you know whether to use K=[P]/[R] or PV=nRT in problems involving partial pressure, because there were problems on the modules that used partial pressure, but K=[P]/[R] was used.

Kayla Booker 1F

I think the only difference with his grading scale is that a C- begins at 50% and the rest remains the same. So an A- would be 90%-92% and an A would be 93%-96% but I could be wrong.

Kayla Booker 1F

Can someone please walk me through how to recognize or determine if a substance is amphoteric?

Kayla Booker 1F

Yes, you should at least have a general idea, and sometimes after drawing out the 3D model you can figure out the bond angles.

Kayla Booker 1F

pH formula is pH=-log[H+] and Im not sure if we need to know how it's derived, but another formula for pH is pH=14.00-pOH

Kayla Booker 1F

yes, all questions are multiple choice, each worth 6 point each, no partial credit

Kayla Booker 1F

The questions are going to be distributed, but I think there will be more questions on The Quantum World since that was the largest section

Kayla Booker 1F

I don’t think there will be any extra credit offered, possibly partial credit on final but I’m not sure.

Kayla Booker 1F

I think Ferrate is used when the overall compound has a negative charge and iron is used when the compound is positive.

Kayla Booker 1F

I believe that they are interchangeable and you can use either.

Kayla Booker 1F

The final is going to be cumulative. I think since Quantum World was the largest section, it will appear the most on the exam.

Kayla Booker 1F

I was wondering the same thing

Kayla Booker 1F

I've personally been watching YouTube videos on the earlier topics just to refresh and try to remember the things that we've already learned

Kayla Booker 1F

Yes, I believe that you read molecules from left to right

Kayla Booker 1F

I think doing the textbook questions help a lot, especially if you do them as you're learning the topics because its another way of testing what you've learned.

Kayla Booker 1F

I don't think exam questions would be answered on here, but I think you can either go to Dr. Lavelle's discussion sections or even in ta office hours and get any questions answered.

Kayla Booker 1F

My TA said that you could write it either way but it flows better if you put 3d before 4s.

Kayla Booker 1F

They do, but I don't think we have to have them memorized, at least not for 14A

Kayla Booker 1F

I had this feeling after both Midterm 1 and 2 and I feel like its just the nerves that make you second guess. I was so worried after Midterm 1 and I ended up doing okay. Just try not to overthink or worry!

Kayla Booker 1F

I think it is cumulative

Kayla Booker 1F

Im thinking sometime next week since that's Midterm 1 grades came out the week after.

Kayla Booker 1F

I don't think we need to know this for the midterm since it should be straightforward, but I was honestly wondering the same thing.

Kayla Booker 1F

You'll definitely need the periodic table and scratch paper, I'm not sure how helpful the constants and equations worksheet will be, but I'd print it out just in case.

Kayla Booker 1F

Im definitely in the same boat, I've been trying to do calculations to try to figure out what grade I need to get on the second midterm and the final to get an A lol.

Kayla Booker 1F

I would think so, the lowest formal charge would be the most accurate, but maybe recognize multiple structures just in case.

Kayla Booker 1F

Is it necessary to put brackets and the charge outside of the Lewis structure if the formal charges are added to the atoms?

Kayla Booker 1F

I am not sure if anyone struggles with test anxiety... if you do, what are some techniques you guys use to deal and control test anxiety? Thank you. I try to calm my self first by just breathing because I find that they first thing that happens to me is that my breathing starts becoming weird and t...

Kayla Booker 1F

I’m not sure about how many exceptions there are, the ones I know of are B, Al, and Be. The way to tell that they are exceptions is if there is no way for the middle atom to create and octet

Kayla Booker 1F

I hung out with a couple of friends and we had a little painting party

Kayla Booker 1F

My all time favorite show would be The Vampire Diaries, but childhood would be The Proud Family or Zoey 101

Kayla Booker 1F

When using the formal charge equation, what does L represent, and how do I find it’s value?

Kayla Booker 1F

It is because we are specifically using the noble gas configuration so you would use the most recent noble gas for your shorthand configuration in efforts to start with the highest amount of valence electrons, since they increase from left to right.

Kayla Booker 1F

I think it's best to write it the long way because it's more specific so he can easily follow the configuration.

Kayla Booker 1F

P represents momentum which is (mass)(velocity). It measures the quantity of motion.

Kayla Booker 1F

As you may well know, placing metal objects inside a microwave oven can generate sparks. Two of your friends are arguing over the cause of the sparking, with one stating that the microwaves "herd" electrons into "pointy" areas of the metal object, from which the electrons jump fr...

Kayla Booker 1F

When using De Broglie’s equation to find velocity, is it necessary to change the wavelength of 750.0nm to m and the mass in g to kg?

Kayla Booker 1F

Since de broglie’s equation is wavelength =h/mv, you multiple v to both sides then divide by wavelength to get v=h/m(wavelength)

Kayla Booker 1F

I believe it would be on the midterm. Since my TA said that everything from week 1 to Wednesday of week 3 is free game.

Kayla Booker 1F

I think it’s good to memorize them just in case, but I’m pretty sure they will be on the constants and formula sheet.

Kayla Booker 1F

I think the best way is to apply sig figs at the very end otherwise your answer might be off by a little

Kayla Booker 1F

For the midterm, I plan on reviewing using the audio visual videos, working through the textbook questions and also rewatching some lectures because I was confused on a few topics.

Kayla Booker 1F

The negative when finding the difference in energy just shows that energy decreased and it was released as electromagnetic radiation, since there is no such thing as negative energy, so when using the E=hv formula, you take away the negative

Kayla Booker 1F

Since joules is actually kg.m^2s^2, I think it’s okay to use either kg or meters, you’ll just get a different answer, but both answers are correct

Kayla Booker 1F

I believe it stays at n=2 because a jump from n=2 to n=1 requires the most amount of energy since the energy levels get closer and closer as they get higher, so like a jump from n=3 to n=2 requires less energy than a jump from n=2 to n=1, so if the electron cannot emit an equal or greater amount of ...

Kayla Booker 1F

Hi, for the mass you use the mass of an electron which is 9.109 x 10^-31. Your issue might be the speed, since it is in km/s you want to make sure that you convert it to m/s.

Kayla Booker 1F

What formula is used to find the wavelength after finding delta E? Is it E=hc/wavelength or c=(wavelength)(v)?

Kayla Booker 1F

Does anyone know where our grade will appear? Like will it be on ccle or somewhere else, because I know for some of my other courses the grades are posted on a different site?

Kayla Booker 1F

The zeros are considered trailing since there's no decimal placed, so you would only count the 9 and 5 as significant, but if there were a decimal placed anywhere in the number, every number would be significant.

Kayla Booker 1F

Does anyone know how I can get to the actual digital textbook, like I see where the homework is but where do I go to find the textbook from there?

Kayla Booker 1F

With significant figures, you round to the least amount of sig figs in the problem, unless the problem asks for an answer with a specific amount of decimal places.

Kayla Booker 1F

The question states, "For the following equation , determine the limiting reagent if 21.4g NH3 is reacted with 42.5g of O2 4NH3 (g) + 5O2(g) ---> 4NO (g) + 6H2O(g) After doing the work I thought that NH3 was the limiting reagent but it came out as wrong, so if anyone can explain the correct way...

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