CHEMISTRY COMMUNITY

Nathaly Cruz 2D

water works as both an acid or a base depending on the conditions of the problem

Nathaly Cruz 2D

Nancy Yao wrote:I barely finished the exam. I rushed on several questions and I am pretty sure they are wrong. Also, I did wrong on questions that I spent a lot of time on, which is quite disappointing.

Same. I submitted with one second left because I just ran out of time :( Hopefully, we did well enough though

Nathaly Cruz 2D

I doubt there will be any curve to our grades.

Nathaly Cruz 2D

My new year's resolution is to grow and be like a bottle of water. I'm usually like a soda, everything around me causes a reaction, but water can be shaken and thrown and it is still calm. So it is my new year's resolution to stay calm even when the world around me seems chaotic.

Nathaly Cruz 2D

250 out of 500 points is a passing grade!

Nathaly Cruz 2D

When rotating, would the pi bond break because it is no longer parallel? Correct! Pi bonds don't allow atoms to rotate, so if the atom is no longer parallel, there is no pi bond. This is because pi bonds have electron densities on each side of the internuclear axis, preventing the bond to exist if ...

Nathaly Cruz 2D

Astha Patel 3D wrote:-ate is used when the complex ion has a negative charge. Usually, the coordination compound will contain some metal cation in front of the complex ion in the bracket.

Thanks for the explanation. It helped a lot :)

Nathaly Cruz 2D

When rotating, would the pi bond break because it is no longer parallel?

Nathaly Cruz 2D

Thank you for the encouragement! Good luck everyone on their finals and like Aliya said, "they're just grades." Don't forget to take care of yourself too. You can do it! We are almost done with the quarter just hang in there.

Nathaly Cruz 2D

A Bronsted acid can donate H+, so there should be a Hydrogen in the formula. This leaves H3PO4, HBrO2, H2PO4^- to be possible answers. A Bronsted base can accept H+, which can be indicated by a negative charge as it allows the substance to accept an H+. Out of the 3 possible answers, H2PO4^- has a ...

Nathaly Cruz 2D

In order to reduce my nerves before a test, I tend to meditate. I've found that it helps me think more clearly and second guess myself less.

Nathaly Cruz 2D

I think UA sessions help a lot!

Nathaly Cruz 2D

Hey! I was struggling too. Someone advised me to connect the three carbons in a triangle. The triangle should have only one double bond. Then attach the hydrogens accordingly.

Nathaly Cruz 2D

I think being well rested and having eaten something before an exam improves your performance. I've noticed that when I am tired or hungry, I perform worse on my exams than when I have slept well and eaten.

Nathaly Cruz 2D

A delocalized pi bond correlates to resonance structures. A pi bond is a regular pi bond because the molecular structure that is drawn only has that one assemblage for it. Delocalization occurs because there are multiple possible resonance structures for that molecule that are affecting the true ov...

Nathaly Cruz 2D

I know this is an old post, but I was struggling and it really helped to look at how others have helped each other in the past. I'm super thankful for chemistry community!

Nathaly Cruz 2D

Victoria_Sauceda_1B wrote:The final will be a cumulative if everything learned In class. He is going to use the midterm scores and questions to prepare us for the final.

How will he do this?

Nathaly Cruz 2D

In order to relax after midterms, I am kind to myself. I take a nice shower and get cozy. Watch a movie with some snacks, maybe go for a walk and then go to sleep. But, everyone has their own needs and way of relaxing. I am currently taking a meditation class that emphasizes that you should take a m...

Nathaly Cruz 2D

The stronger IMF = higher melting point because you require more energy to break the bonds apart.

Nathaly Cruz 2D

How do you calculate/approximate bond angles in a given molecule? Thanks! I believe what you are asking here is for your own individual problem solving, so the best advice I can give is to memorize the bond angles between "parent" shapes as well as memorize that adding lone pairs decrease...

Nathaly Cruz 2D

I don't think extra credit would be offered even though it would be nice and help out a lot of students that are struggling because of zoom fatigue.

Nathaly Cruz 2D

If a molecule is polar, that means the charge distribution will be unequal. For example, in the molecule HF it would be polar because F is much more electronegative than H and therefore will have a stronger pull on the electrons. Making the F side of the molecule slightly more negative than the H s...

Nathaly Cruz 2D

I had the same question. When I was doing the problem on sapling, I got it wrong then it told me that each oxygen atom had an oxidation number of -2. Since there are 4 oxygen atoms, the oxidation number was -8. However, all the oxidation numbers added together must equal the formal charge which in t...

Nathaly Cruz 2D

Savana Maxfield 1G wrote:I calculate formal charge by: number of valence electrons - number of nonbonding electrons - (1/2) bonding electrons

I was struggling with formal charge and this equation really helped me understand it :)

Nathaly Cruz 2D

For formal charge the most probable structures are the ones with the least amount of formal charges on the individual atoms (as long as it still adds up to the total charge), and for bond length, it says that experimentally it was found that the bond length was 144 which is close to 140, the bond l...

Nathaly Cruz 2D

I think as long as you can do the problem on sapling without trouble, you should be fine for the midterm.

Nathaly Cruz 2D

Dude Criminal Minds is golden (fave character?). That is literally my comfort show, after every midterm or final, I would just binge watch it to get rid of the negative vibes lol. DEFINITELY 10/10 SHOW Spencer! All time favorite :) (who's yours?) it's my comfort show too! You can never go wrong wit...

Nathaly Cruz 2D

Hi! The spin state (ms) is a fourth quantum number discovered after Schrodinger's wave function (which consists of 3 quantum numbers: n, l, ml). The spin state can either be (+1/2) or (-1/2). +1/2 means the electron is spinning upwards, and -1/2 means it is spinning downwards. And professor Lavelle...

Nathaly Cruz 2D

Midterm 2 will still be multiple choice :)

Nathaly Cruz 2D

I know it's pretty late to ask this. I completely bombed my first midterm and I was looking for ways to improve my second midterm. I keep seeing that the textbook is really good for extra practice and explanations. Could someone please explain where to find the textbook?

Nathaly Cruz 2D

I’m definitely nottt doing well :) I hate school, and the online format makes it harder. I honestly just want this quarter to be over lol. SAME but at least we are getting through it. I found that it might help to study with others so if you're down to study together just let me know :) (send me a ...

Nathaly Cruz 2D

Yes. It is due next Sunday (not today :) but Sunday of week 6).

Nathaly Cruz 2D

i heard from the TA's that midterm two will have more questions than midterm one.

Nathaly Cruz 2D

I'd recommend Money Heist, Criminal Minds, The Vampire Diaries, The Originals and Legacies. :) If you know a specific type of show that you like, I can come up with more ideas, those are just some recommendations. Dude Criminal Minds is golden (fave character?). That is literally my comfort show, a...

Nathaly Cruz 2D

Hi, I was able to find the work function easily, but how do you find the maximum number of electrons ejected? The first part was "When a metal was exposed to photons at a frequency of 1.47×1015 s−1, electrons were emitted with a maximum kinetic energy of 3.30×10−19 J." My work function ca...

Nathaly Cruz 2D

I'd recommend Money Heist, Criminal Minds, The Vampire Diaries, The Originals and Legacies. :) If you know a specific type of show that you like, I can come up with more ideas, those are just some recommendations.

Nathaly Cruz 2D

I followed the steps, but it still says my answer is incorrect. I used the formulas you guys provided in order to get the answer. I converted my answer from J to eV by using the conversion on the constants and equations sheet, "1 eV= 1.602 x 10^-19J", but it still says incorrect.

Nathaly Cruz 2D

I believe Dr. Lavelle said that everything covered up to the end of lecture #9 will be covered on the midterm. Lecture #9 included information on orbitals in the context of Schrodinger equation, so I assume it will be on the midterm. So just clarify, the midterm will only cover material until lectu...

Nathaly Cruz 2D

Hey, maybe a group zoom study session before the midterm would help. I'm down to do one if anyone is willing.

Nathaly Cruz 2D

Hey, no one really knows. So far, everyone is just saying that time will not be a problem :)

Nathaly Cruz 2D

Melanie Krahn 1C wrote:I have heard that the midterm is supposed to be multiple choice with a mixture of both worked and conceptual problems that need to be completed within the fifteen-minute time period. Hope this helps!

Fifteen? I thought we had 50

Nathaly Cruz 2D

CCLE should be up and running now for everyone

Nathaly Cruz 2D

Hey. I've heard mixed responses on how many questions will actually be on the midterm. It has been unclear how many questions will be on the midterm. I would expect maybe about 15-20 but I am not really sure since we only have 50 minutes to complete it. My TA said not to worry. Time is usually not a...

Nathaly Cruz 2D

Q: what do you call an acid with an attitude?
A: a-mean-oh acid

Nathaly Cruz 2D

Also, when multiplying and dividing numbers in scientific notation, make sure that your answer has the correct number of significant figures. Your answer should have the same number of sig figs as both values. However, if both values have a different number of sig figs, your answer should have the ...

Nathaly Cruz 2D

Hey. I would recommend going over your lecture notes, doing the textbook problems and maybe hosting your own zoom study sessions to go over/get clarification on the things that are a bit more confusing to you.

Nathaly Cruz 2D

Hey I was wondering this too. I think something that would be beneficial for studying might be to host zoom study sessions with other people in the class and also do the recommended homework problems from the textbook.

Nathaly Cruz 2D

I would wait until the end to round your numbers. I would also stick to the number of sig figs that were given in the problem, just to be safe.

Nathaly Cruz 2D

Hey. I think depending on your discussion, you may still go over it before the exam. We have another week before the midterm. :)

Nathaly Cruz 2D

Does anyone know the exact dates and times of the midterms? I couldn't find it :(

Nathaly Cruz 2D

I looked them up on google.

Nathaly Cruz 2D

Hi. I was really lost too until someone explained it to me. So looking at the problem, the given information is that we have 1.000g of caproic acid. We have 2.275g of CO2 and 0.929g of H2O. Step one would be to find the carbon in CO2. In order to do this, you must take the molar mass of carbon (12.0...

Nathaly Cruz 2D

Hey, I haven't seen a Groupme for discussion 2D yet. Would you like for me to start one?

Nathaly Cruz 2D

Aimee Alvarado 2K wrote:So this is how I solved the problem:

Thank you so much for listing it out step-by-step. I was really struggling and the detailed instructions helped.

Nathaly Cruz 2D

Although I am not well-versed in salt cations either, I have done some research. According to what I have found, when an atom is heated, some of the electrons become "excited". Once the electron drops from one energy level to a lower one, it emits a "quantum of energy." The combi...

Search found 55 matches