CHEMISTRY COMMUNITY

Sheryl Ocampo 1D

It's the moles of electrons transferred in the reaction

Sheryl Ocampo 1D

Yes, for E naught in a concentration cell, the solutions have the same composition at the same concentration, meaning that the voltage difference between the solutions is 0

Sheryl Ocampo 1D

only temperature!

Sheryl Ocampo 1D

^^ A is a constant that describes the angular dependence of a collision, it is independent of activation energy

Sheryl Ocampo 1D

Pretty burnt out if I'm being honest, I'm ready for the quarter to be over

Sheryl Ocampo 1D

my guess is that the graphs would be given to us

Sheryl Ocampo 1D

Only a change in temperature!

Sheryl Ocampo 1D

I like handwritten notes bc I find them easier to annotate and look back on, plus I feel like it forces me to remember more

Sheryl Ocampo 1D

I totally forgot about daylight savings, thanks!

Sheryl Ocampo 1D

I'm a freshman and I'm looking forward to getting to do classes in person and meet people, especially in clubs/organizations :)

Sheryl Ocampo 1D

Can someone give me some guidance please, I'm not sure what I'm doing wrong. Thanks!

Sheryl Ocampo 1D

You too!

Sheryl Ocampo 1D

Netflix is great :)

Sheryl Ocampo 1D

I try studying with other people so I can at least bounce ideas off of others

Sheryl Ocampo 1D

A couple of deep breaths and plenty of practice problems!

Sheryl Ocampo 1D

UA sessions are super helpful and I think it helps just overall taking the time to understand all the concepts

Sheryl Ocampo 1D

Personally, I feel that doing practice problems and using some of the other resources are more effective in helping me prepare for exams than reading the textbook

Sheryl Ocampo 1D

I love mac n cheese

Sheryl Ocampo 1D

Forcing myself to do tons of practice problems makes me more confident the day of the exam

Sheryl Ocampo 1D

Planning ahead definitely helps, I'm not sure what your work schedule is like but I can usually get all of my regular classwork done on the days that I work. I can then use my days off to study for finals

Sheryl Ocampo 1D

I believe the cutoff is Sunday at 11:59 so that post should count towards week 7 :)

Sheryl Ocampo 1D

Yup, that is the way to determine if a reaction is spontaneous

Sheryl Ocampo 1D

I think it has to do with their lewis structure and how many orientations are possible for each atom. The more possible positions for an atom, the higher the residual entropy

Sheryl Ocampo 1D

I'm honestly really worried too. I find a lot of the thermochemistry problems confusing and I struggle to know when to use each of the equations

Sheryl Ocampo 1D

Yup, they are isolated and sealed

Sheryl Ocampo 1D

Work done on an irreversible pathway, occurs quickly and has the system working against a lower external pressure. On the other hand, work done on a reversible pathway occurs quickly, maximizes work done, and works against an external pressure that is nearly equal to the internal one.

Sheryl Ocampo 1D

When work is being done by the system, energy is leaving the system making it negative. When work is being done to the system, energy is being absorbed by the system, making the value positive

Sheryl Ocampo 1D

I usually just look for what's given and what I'm looking for and see how I can relate them with the equations

Sheryl Ocampo 1D

To calculate the work for Path A, you use the formula for work of an isothermal, reversible expansion: w=nRTln(v2/v1). To solve for moles of gas, you can use PV=nRT since it is an ideal gas. Once you know the moles of gas, you can plug it into the formula along with the other given information to so...

Sheryl Ocampo 1D

Thanks for the tips! I do the same with the textbooks problems, I like having them fresh in my mind before the exam

Sheryl Ocampo 1D

Thanks for sharing, that was really helpful :)

Sheryl Ocampo 1D

I finally got into the Queen's Gambit. Parks and Rec, Gravity Falls, and Breaking Bad are also among my top favorites :)

Sheryl Ocampo 1D

Thanks!! You too :)

Sheryl Ocampo 1D

Thanks!!

Sheryl Ocampo 1D

A nap sounds great to me! I'm loving the positivity btw

Sheryl Ocampo 1D

I'm honestly in the same boat as you. I find it comforting knowing others are in the same position though

Sheryl Ocampo 1D

The textbook problems are super helpful and are probably the most similar to the actual exam

Sheryl Ocampo 1D

Temperature is constant during a phase change as the heat is being used to break/form bonds

Sheryl Ocampo 1D

the change is going to be negative if it's a reactant and positive if it's a product

Sheryl Ocampo 1D

the amount in the products is going to decrease, which will cause the products to increase

Sheryl Ocampo 1D

The textbook and sapling problems are a lot of help!

Sheryl Ocampo 1D

I don't think we technically have class, but there will probably be a lecture for us posted to watch later

Sheryl Ocampo 1D

I'm pretty sure you only consider moles of gases

Sheryl Ocampo 1D

You get points for both!

Sheryl Ocampo 1D

He said later on that it was a weak acid so I think it was just a mistake

Sheryl Ocampo 1D

I found that doing practice problems helped me the most, dispersing practice over longer periods of time is definitely better than trying to cram it all in right before midterms

Sheryl Ocampo 1D

Yup, either one should work since molarity is just moles/liters and the the reactants and products would all be in the same vessel with the same volume

Sheryl Ocampo 1D

Technically you could use either Kp or Kc when calculating the equilibrium constant for gases, it's usually just easier to use the one that correlates with the given information. However, only Kc can be used for other states of matter

Sheryl Ocampo 1D

I think you use a negative for the reactants because they are getting used up in the reaction, so the quantinty present is decreasing and a positive for the products since the quantity present is increasing

Sheryl Ocampo 1D

I don't think ideal gases actually exist, but for the purposes of our class we just treat gases as if they were ideal

Sheryl Ocampo 1D

I only really use the textbook for practice problems or sometimes skimming before exams. I find that the lectures have the information we need to know and it's much easier to understand for me

Sheryl Ocampo 1D

This was so helpful, thanks for sharing :)

Sheryl Ocampo 1D

lots of practice problems and understanding the concepts well should help

Sheryl Ocampo 1D

Thank you so much, this is so helpful!! :)

Sheryl Ocampo 1D

My TA mentioned this in discussion the other day. Based on the concepts we learned, it should be a strong acid. However, it is an exception because flourine is such a small atom. The bond between hydrogen and flourine is so small and strong that it makes HF a weak acid

Sheryl Ocampo 1D

I think going over some of your notes to review the main concepts should be sufficient. you can always look back on them later if needed too

Sheryl Ocampo 1D

I'm feeling okay, I'm really worried about the final but I'm sure my nerves will calm down once I study more

Sheryl Ocampo 1D

I thought I was the only one thinking about this

Sheryl Ocampo 1D

I think that preparing well and getting plenty of sleep the night before would help calm test anxiety. Also, you might want to think about drinking tea or doing yoga beforehand

Sheryl Ocampo 1D

I think it just means that the salts make the water more basic and bases typically have a soapy feel to them

Sheryl Ocampo 1D

I'm pretty stressed for finals, but I'm glad winter break is coming up. I'm probably most worried about this class

Sheryl Ocampo 1D

The symmetry of the molecule also plays a role in polarity as the partial charges could cancel each other out

Sheryl Ocampo 1D

I think of resonance structures as having the same atoms bonded to each other and the same relative positions of the atoms, only the electron locations change

Sheryl Ocampo 1D

Yes, count all the sigma bonds first and the count the leftover bonds as pi bonds

Sheryl Ocampo 1D

I'd recommend just doing practice problems and trying to understand the concepts behind determining molecular shapes

Sheryl Ocampo 1D

Happy thanksgiving! My family usually does dinner together and shares things we're thankful for

Sheryl Ocampo 1D

Usually the electron will be removed from the outermost orbital as it requires the least energy

Sheryl Ocampo 1D

Yup, I believe the final is cumulative and consists of multiple choice questions

Sheryl Ocampo 1D

I think it helps to start preparing far in advanced. If I feel like I've practiced and know the material well, I experience less test anxiety. For studying, I find it also helps to study in a place where you're comfortable and to practice self-care

Sheryl Ocampo 1D

I'd expect around thursday/friday since it took a week to get our results back last time

Sheryl Ocampo 1D

I think so, we still had one on Veteran's day. Discussions will probably be canceled though

Sheryl Ocampo 1D

Resonance structures are multiple structures of the same molecule. Some of these resonance structures have a lower formal charge, making them more favorable and more stable

Sheryl Ocampo 1D

I'm always worried about my grades, I'm glad I'm not the only one

Sheryl Ocampo 1D

We should learn more in upcoming lectures, I think that's all we need to know for now

Sheryl Ocampo 1D

Yeah, you can check the points you've received under the grade section of the chemistry page on CCLE

Sheryl Ocampo 1D

I think I'll be focusing more on the textbook since a lot of the problems from midterm 1 were similar to ones in the textbook

Sheryl Ocampo 1D

I would suggest looking over your notes on a regular basis and ensuring that you understand the homework problems. Closer to the midterm, it would help to look over the textbook problems. I found that the textbook problems were pretty similar to the questions on the last midterm

Sheryl Ocampo 1D

I only took honors chemistry in high school and I've found that a lot of the basics are pretty familiar to me. However, there are some times where I have zero knowledge of the concepts being introduced

Sheryl Ocampo 1D

I find that I get lazy when I study indoors, especially when I'm in comfortable clothes. I've been trying to study either in my backyard or at coffee shops with outdoor seating to motivate myself

Sheryl Ocampo 1D

I'm doing alright, just trying to find a healthy balance between school and my personal life. It's been pretty difficult to motivate myself with school being online, but I've established a pretty consistent routine that works for me

Sheryl Ocampo 1D

My favorite childhood TV shows include The Fairly Odd Parents, Gilmore Girls, and Danny Phantom. Some shows I would recommend are Breaking Bad, The Office, Friends, and The Good Place

Sheryl Ocampo 1D

I carved pumpkins and watched scary movies with some of my floormates :)

Sheryl Ocampo 1D

Isoelectronic just refers to when elements have the same number of electrons, it doesn't mean that they necessarily share any properties. for example, Na+ and Ne have the same number of electrons, but it doesn't mean that they behave the same way

Sheryl Ocampo 1D

I think the two spin states refer to the different ways the electrons can spin on their axes

Sheryl Ocampo 1D

yes, c is always the speed of light, it doesn't vary

Sheryl Ocampo 1D

From what I remember, scores will be released once everyone has taken the exam and it has been reviewed to ensure there are no errors

Sheryl Ocampo 1D

I believe there are different approaches that all lead to the same answer. Personally, I try and balace the atoms that are least present in the reaction first

Sheryl Ocampo 1D

I think it's the theoretical concept of a substance that absorbs or reflects all wavelengths of light

Sheryl Ocampo 1D

From my understanding, the test is multiple choice but there will be partial credit. Some answers will get partial credit based on what you had to do to get to that point

Sheryl Ocampo 1D

I like taking walks and listening to music to relax

Sheryl Ocampo 1D

I believe he said there would be ten if I remember correctly

Sheryl Ocampo 1D

Yes, they both mean the same thing. One is just the simplified version of the other

Sheryl Ocampo 1D

amazon

Sheryl Ocampo 1D

For addition and subtraction, your answer should have the same number of decimal places as the lowest number. For multiplication and division, your answer should have the same number of significant digits as the number with the fewest sig figs

Sheryl Ocampo 1D

Yeah, the sapling homework isn't due until week 4

Sheryl Ocampo 1D

I am watching my lectures and going over my notes. Aside from doing the sapling homework, I go over the textbook problems if I have extra time

Sheryl Ocampo 1D

20.01 has four sig figs. Whenever a 0 is between two significant digits, it's considered significant, regardless of whether it is before or after the decimal point. However, a trailing zero is only significant if it is after the decimal point.

Sheryl Ocampo 1D

The symbol just means that the molar mass isn't exact and falls anywhere in the range of 90-100 g/mol

Sheryl Ocampo 1D

Whenever you're converting to moles or looking for the "number of atoms," you'll be using Avogadro's number

Sheryl Ocampo 1D

I usually try to balance the atoms that there are the most of in a chemical reaction first and then move to the ones that there are the least of. To keep track of the ones I've balanced, I tally them on the side of the equation.

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