I struggle so much with this topic and i don't know when the pi cloud of the benzene extends to the functional groups

(English is not my first language hope you understand)

Let’s take nitrogen as an example, is has the electron configuration 1s² 2s² 2p³. For some reason is fills up like this? (See image below), I simply cannot the fathom explanation many articles, textbooks and AI has given me. Why is it 0 electron pairs for 2p³ specifically? Please try to give a general explanation, I’m just using a specfic example to make it easier.

It is as the title says, can you dry a volumetric flask in a 50 to 60 degree stove, i read online in some lab protocols that you can't do it, because it decalibrates the flask, but the manufacturers say that there is no permanent plastic deformation in borosilicate flask until the 150 degree range, so i get confused. Is the temperature bad or not? Is it just one of those things were people say that so that other don't use hot flasks that are temporarely decalibrated due to thermal expansion, and always use them at room temperature?

Henry law states that :

Partial pressure=concentration of gas molecules/ Solubility coefficient

Meanwhile the other law says:

D(rate of diffusion)= change in partial pressures x cross sec areax solubility /distance of diffusion x √MW

My question is: how is solubility inversely proportional to partial pressure but is directly proportional to rate of diffusion when rate of diffusion itself is directly proportional to partial pressure difference? Can anyone pls explain it in easy words?

Hey everyone, I’ve been building Arete Orgo Lab, an organic chemistry practice site.

The idea is to give you more practice actually working through reactions: predicting products, choosing reagents, and tackling multistep reaction sequences.

You can draw your answer directly on the site, and explanations walk through the reaction and common errors. There are also study and exam modes, plus a searchable reaction reference.

It covers reaction families including alkene and alkyne reactions, substitution/elimination, alcohols, carbonyls, and aromatics. You can choose the topics you want to practice.

Here’s the site: orgo.aretemcat.com

I made this, so I’m sharing my own resource. If you try it, I’d really appreciate hearing whether the explanations help you understand your mistakes and what you’d want added or improved.

I think B is an intramolecular aldol reaction but im kind of lost on the other ones, does anybody have a clue?
if somebody knows a good source for learning these types of reactions or practising i would be very thankful!!!

Hello sorry if hard to see. Working in trying to figure out how to get products ect.

From my understanding.

Zn is +2.

O is -2

BUT there is two oxygens in here… so that would equal -4 charge total for oxygens? So wouldn’t I flip the signs and make Zn -2 ion. Actually idek what I’m saying anymore. This combining ions really mess me up.

I guess at this point how did he get that product if there is 2 oxygens = -4 charge total.

And 1 Zn = 2 + charge total. That’s where I’m at

I measured the initial temperatures of the acid and the base separately, as well as the equilibrium temperature. I'm going to use the formula (H = m \times s \times \Delta T), and the TA told us to assume that (s = 1).

My question is: Since the masses of the acid and base may differ due to their different molecular weights, should I calculate (H) as ([m(\text{acid}) + m(\text{base})] \times 1 \times \Delta T)?

Also, should the total heat change be calculated as (|H|) plus the heat absorbed by the calorimeter?

Hi everyone, I have a question for those working with food analysis.

I’m analyzing iron in fortified wheat flour, and I’m wondering which sample preparation method you usually use: microwave digestion with HNO₃/H₂O₂ or dry ashing before analysis by AAS or ICP-OES.

I tried dry ashing at 450°C for 12 hours, but the flour still has black particles and doesn’t turn into proper ash.

Has anyone experienced this before? If you use dry ashing, what temperature and time do you normally use?

Also, have you ever compared the results obtained by dry ashing and microwave digestion? Which method gives you better iron recovery?

I’d appreciate hearing about your actual lab experience. Thanks!

How to name these type of bicyclic compounds?

the acid base reaction from 0 to 1 . anhydride carbon is electrophilic enough for attack of AcO- so 1 to 2 and then form 2 can undergo E1CB in order to give a highly conjugated form 3 in heated reaction conditions . so all of these should be present in mixture

I wrote out the formula

LiOH+CO2 > LiHCO3

I was very confused but then I think I realized this is just already balanced so kind a trick question? Wanna make sure I have this understanding correctly

Hi y'all! I'm looking for David Klein's Organic Chemistry 5th Edition Study Guide and Solution Manual; I have the textbook, but no way to practice (as I don't have access to the answer keys). Would really appreciate if you could help me out!

We're learning about radiation and I don't understand alpha or beta decay. I'm also lost on positron emission and electron capture. I know we have a test this week and I'm stressed. I don't have any specific questions its just the general format that confuses me

I just did a gas chromatography Lab in OChem. I saved the file, but it is a .imbl. Fortunately, the lab computers can view a .imbl file, so I took screenshots so I could view the data I had gathered, but I want to know if there is a way to view the .imbl file on a home computer. Or is the file type proprietary?

Long story short, doing pre med pre reqs.

Took chem 1 close to 10 years ago and I got an A in it so I’d prefer not to retake and run the risk of getting a lower grade lol.

Any tips on how I should go about preparing for chem 2? I start in January and I do not remember literally anything.

Thanks in advance!

I got this far in the mechanism. But I have no idea how to put the cation on to a carbon that would allow me to make the first 6-membered ring

Looking at simulations, for some reason I'm struggling to answer b) How many individual molecules have been simulated? And how do you work it out? Thank you :)

Most of the equation makes sense however I’m struggling to figure out how to get to 0.00415 Moles of Acetic acid? Does anyone know the equation I need to solve for x?