CHEMISTRY COMMUNITY

Jeffrey Fenn 1G

This was awesome, thank you!

Jeffrey Fenn 1G

Hopefully try to fix my sleep schedule /:

Jeffrey Fenn 1G

All grades should be in by Saturday!

Jeffrey Fenn 1G

Hi, I was wondering what is the difference between a square planar complex and a tetrahedral complex. I know they both have 4 ligands attached to the central atom, but what makes them different?

Jeffrey Fenn 1G

Not always, I would look at this section in the textbook, that is what really helped me.

Jeffrey Fenn 1G

Thank you so much!

Jeffrey Fenn 1G

I would assume probably a week after the final would be an realistic expectation.

Jeffrey Fenn 1G

We finish the syllabus Wednesday, but there is going to be a review lecture on Friday!

Jeffrey Fenn 1G

Yeah after talking to some friends that have had Lavelle in the past I don't think he offers any extra credit, especially this quarter with the high averages.

Jeffrey Fenn 1G

Happy Thanksgiving everyone please make sure to take care of yourselves through these crazy times!

Jeffrey Fenn 1G

I always think of these as whether or not bonds can be found on other atoms in the molecule and maintain the appropriate number of electrons for the molecule along with a full octet.

Jeffrey Fenn 1G

I think of delocalized pi bonds being involved in resonance structures if that helps!

Jeffrey Fenn 1G

Like most of the others have said, there is no clear grading scale unfortunately because I don't think Lavelle has decided how or if he will curve the class yet.

Jeffrey Fenn 1G

Hi, so I understand that lone pairs decrease bond angles, for example NH3 goes from 109.5 to 107, but someone explain why this happens? Does it have to due with the energy of the lone pairs being higher?

Jeffrey Fenn 1G

I think as long as you know the names you will be okay, I don't think we need to memorize how to draw them.

Jeffrey Fenn 1G

The two main things you need to look at are surface area and size of the atom!

Jeffrey Fenn 1G

This is a kind of random question, but does anyone know what the word says on his hat. I think I am able to see a word but I honestly may be completely wrong.

Jeffrey Fenn 1G

Personally I think I am going to go and do all of the new textbook questions of the stuff we are learning. Then I might go back and review the lectures and textbook of the subjects I was more unsure about.

Jeffrey Fenn 1G

Don't let one test define you! Just study as hard as you can for the final and you will be okay. I did the textbook problems here and it really helped me.

Jeffrey Fenn 1G

On the last midterm I just used Zoom on my phone and propped it up against my wall and it worked perfectly!

Jeffrey Fenn 1G

I think in one of his emails, Lavelle mentioned a way to make up points by going to office hours or something I am not sure exactly which it was.

Jeffrey Fenn 1G

Does anyone know if oxidation numbers will be on the midterm?

Jeffrey Fenn 1G

It is from the lecture where he introduces orbitals all the way to Wednesday 11/11 lecture.

Jeffrey Fenn 1G

Can someone explain what the lone pairs do in hydrogen bonding? Do they go away or do they just interact with the hydrogen to make the H-bond?

Jeffrey Fenn 1G

I think Professor Lavelle said in another post that it will be more questions, and less points per question!

Jeffrey Fenn 1G

What I did to prepare was try to do all the extra questions that Lavelle assigned and went over all the main topics on the outline, that really helped me the first time!

Jeffrey Fenn 1G

I agree with a post someone else posted, that it is important to memorize why certain trends exist and how they affect different elements. This helped me better understand the main trends that we have to know!

Jeffrey Fenn 1G

Trust me I think everyone here is probably stressing nonstop about our grades! For me personally I just try to not think about it too much, and just do everything I can to be as prepared as possible!

Jeffrey Fenn 1G

Whenever I have questions about some of the high school topics that I don't understand I either watch a youtube video on it (there is a lot of them), or I go to office hours for a TA or Professor Lavelle!

Jeffrey Fenn 1G

I think it is just easiest to think of these two elements as exceptions and know they have lower energy states.

Jeffrey Fenn 1G

Dr. Lavelle responded to a post the other day saying that there was an error on one of the questions, so they are going to need to go through every exam separately which will take awhile.

Jeffrey Fenn 1G

Hi, I was looking back at Monday's lecture and I was a little confused on why elements with half full d5 and full d10 subshells have 4s1. For example, copper came out to Cu: [Ar] 3d10 4s1,why do we decide to not fill the 4s orbital here but instead fill the 3d orbital. Sorry if the wording is a litt...

Jeffrey Fenn 1G

Does anyone know if we should expect our midterm to be curved up/down? Also does anyone know when we can expect to see our grades? I know this was probably already asked, but I couldn't find it anywhere so if it was I am sorry!

Jeffrey Fenn 1G

Are there suppose to be any extra practice problems associated with 1C? If no, are we still suppose to read the whole chapter?

Jeffrey Fenn 1G

I think as long as we do the practice problems and have paid attention in lecture we should all be okay!

Jeffrey Fenn 1G

For me it has always been really easy to maintain sig figs through every part of the problem, because it just takes away the extra stress of conversion when finishing the problem.

Jeffrey Fenn 1G

I did all the practice problems from the syllabus and that took me a few hours but it was definitely worth it!

Jeffrey Fenn 1G

Professor Lavelle has a really good lesson on sig figs on his website that really helped me!

Jeffrey Fenn 1G

Hi there was an alert on CCLE that they might go down tonight for a little, but I think it was a little longer than expected. It should be all good now for the rest of the night!

Jeffrey Fenn 1G

On the last side of the lecture, Dr. Lavelle discussed how De Broglie was somewhat discredited because he believed that anything with momentum could have a wavelength. I understand that maybe at this time scientists were unable to measure such small wavelengths so they would see this as an incorrect...

Jeffrey Fenn 1G

I am a little confused on what your asking. If your wondering how the question was derived I don't think we have to know that for this class. If you want to know I am sure Professor Lavelle will answer it in office hours. Besides that just use the equation to find the amount of energy for each level.

Jeffrey Fenn 1G

Both constructive and destructive! Just think of two waves and whenever they overlap in anyway that is diffraction!

Jeffrey Fenn 1G

I just got one on Amazon today for $18!

Jeffrey Fenn 1G

I just got one on Amazon today for $18!

Jeffrey Fenn 1G

Personally, I like using my IPad much more then paper for a variety of reasons. For starters, as someone who takes a lot of notes it is assuring to me I am at least doing something to save some paper. I was also like only having technically one "notebook" for all my classes, as I think it ...

Jeffrey Fenn 1G

Hi everyone, at the beginning of the quarter, I was under the assumption that the exams for this class would be proctored by our TA over Zoom. However, now I am seeing some posts of people saying we need to use Respondus, but personally I haven't heard anything about this. If anyone could clarify th...

Jeffrey Fenn 1G

Hi, I just wanted to clarify is the homework graded on completion or correctness?

Jeffrey Fenn 1G

It says homework is due on Sunday at midnight, does that mean tonight at 12:00 or tomorrow night at 11:59?

Jeffrey Fenn 1G

For me personally, I always try to balance the larger molecules first.

Jeffrey Fenn 1G

There is a very good video on the website that goes over sig figs, I highly recommend it, it goes over all of this.

Jeffrey Fenn 1G

I don't know if this helps but just make sure to do the first four modules this week, as the next four aren't due until the end of week 2!

Jeffrey Fenn 1G

Even though I haven't taken chemistry yet, I found when I took physics it was really helpful to keep the sig figs consistent throughout the entire problem to prevent confusion.

Jeffrey Fenn 1G

I saw in the syllabus we are getting points for Chemistry Community every week. What is the minimum that we have to do to get points? Sorry I didn't see it clarified in the syllabus anywhere.

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