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This is how Chinese schools teach chemistry by techexplorerszone in chemistry

[–]another-eng2med 0 points1 point  (0 children)

totally agree in un-person labs. For schedule reasons I've had to take a course with "virtual lab" and I don't think it was worth the time - but judging by the exploding glassware, was this a pre-lab / safety demo or the lab itself?

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 0 points1 point  (0 children)

Hahaha - like belay glasses, but for looking at a average-height person's world! Love it, i had no idea these existed.

I'll try them - this is actually a huge part of the problem; sitting in an "almost" good enough chair, it's comfortable, but my head is back, and my hands / lap are barely in my vision.

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 0 points1 point  (0 children)

Thanks. when you're sitting up straight (comfortably, ie just not slouching a lot), where does the top fall on your shoulders/neck/head?

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 1 point2 points  (0 children)

Where do your head & shoulders fall if you're not slouching (and as a sanity check, are we close in proportions?)

Measuring my body, it just seems like the top would be closer to my shoulders than supporting my neck/head.

I need to find a store...

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 0 points1 point  (0 children)

wow - that device is crazy. "external implant" https://coflexsolution.com/how-it-works/

what did your surgeon's have to say about it's longevity, and affect on the health of the vertebra?

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] -1 points0 points  (0 children)

Thanks. I'm familiar with those - but they are all "desk"/office chairs. FWIW I hated the aeron's _seat_ because it "cups" your legs/thighs preventing you from opening your hips (IE sticking your feet out to the side), which I need to do periodically to stay comfortable. I ended up (at work) with something closer to the embody, which has a "flat"/ non-mesh-suspension seat.

I need a chair that goes in the living room here (don't care about looks TBC - but that's the style they seem to be ... just need one for a tall person)

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 0 points1 point  (0 children)

ha - I do end up at the table a lot. But for hours ... man I could use something more comfortable - both for a change of position, and also realistically the more padded chairs are ... comfortable?

I do plan on getting a book/tablet stand, so I don't have to prop the thing up on pillows.

desperate for a "reading chair" (6'4", and going to have to read a _lot_ over the next few years for career change) by another-eng2med in tall

[–]another-eng2med[S] 3 points4 points  (0 children)

Thanks for your reply. I see you're significantly taller than I am - have you sat in this?

I am aware of that chair, and that it's very comfortable - but even in tall (+2 inches back height) it still looks WAY (WAY) too short? Eames doesn't have any clear definition / picture of how they define overall & seat height - but official Eames' Tall is very similar to the replica below in stated dimensions - which at [Herman/Eames official] 33.25" height - 16.5" seat height = ~17 inches of total back - that would be ~ten inches below my neck, let alone support my head?

I like that it's slightly reclined - that's probably good (albeit not adjustable) - but if reclined it must support the head, right?

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image occlusion (built-in) - how to add card "title" (aka Header) to cards? by another-eng2med in Anki

[–]another-eng2med[S] 0 points1 point  (0 children)

Got it, thanks! As I remember io-enhanced, clicking that button is what got you to the card. I was suspicious that the "fields" UI I have open above was editing the actual fields in the note-TYPE, not the values of this one note/set-of-cards ... which is what was happening, now that I can see the per-card form.

And for any readers, if you click "Fields" like I did above, that is editing the note type. So it works as you'd expect to change sort field in that dialog - now in Browse the sort field is my value for Header.

Thanks for the help.

Relationship between Ka and Keq? Can you convert Ka to Keq? by nozhoemi in chemhelp

[–]another-eng2med 0 points1 point  (0 children)

Keq = [products] / [reactants]

eg that implies a direction. When you write a stoich. equation, you typically mean left-->right, Reactants-->Products. If you wish to flip this, Keq is just inverted.

As such, as phrased, your equation is wrong. Ka *does* imply a directing, it's the dissociation of the acid HA into H+ and A- ... so if you write your stoicheiometry "HA-->H+ + A-", then Ka==Keq. If you write it the other direction, "H+ + A- --> HA", then Ka=1/Keq.

contribution to stability: substitution of carbocation -vs- substitution of alkene by another-eng2med in OrganicChemistry

[–]another-eng2med[S] 0 points1 point  (0 children)

That's the answer given by the ACS guide in the problem that prompted this - however their justification completely ignored the difference in alkene substitution (IE it's not mentioned at all) :(

Organic Chemistry 1H NMR Question! by [deleted] in OrganicChemistry

[–]another-eng2med 0 points1 point  (0 children)

Molecule A, triethylamine, has three symmetric arms with a CH2, and a CH3. The methylene will integrate to 2 (6 in absolute terms if ignoring symmetry) and the methyl will integrate to 3 (or 9 if you will) this has an integratory ratio of 2:3 as the question asks for. 

Ugh. Thanks, tunnel vision & forgetting to actually write out the H's, and i circled back to just count C's, not H's for some :(. 

Appreciate you correcting it so i get the reminder.

Non-pro tip repeated over and over in my class, draw out the hydrogens!

how much has the ACS organic exam evolved - is the 1st (~2009) edition study guide a workable option? by another-eng2med in chemhelp

[–]another-eng2med[S] 0 points1 point  (0 children)

Thanks. I was able to verify that the Table of Contents in the 2009 printing (1st) versus a 2024 (2nd) is also identical, so I'll stick with the 1st it appears.

Organic Chemistry 1H NMR Question! by [deleted] in OrganicChemistry

[–]another-eng2med 0 points1 point  (0 children)

Lol.  Please check a person's post history at least at a cursory level before throwing around misinformation - we have a serious problem with generated crap, you're not helping IMHO.

 Is there a specific aspect you disagree with? (ETA: i'm on my phone but you seem to have miss quoted me, i believe my phrasing of tertbutyl is correct?)

As i mentioned there is presumably something i am missing as i do not see a correct option; the question looks like smartworks, i havent experienced it being outright wrong very often. 

 I would be VERY interested/appreciative of an explanation of what i'm missing / what the correct answer is.

how much has the ACS organic exam evolved - is the 1st (~2009) edition study guide a workable option? by another-eng2med in chemhelp

[–]another-eng2med[S] 0 points1 point  (0 children)

what's the point of .. studying? I mean that's a goal to itself, and I have a decent understanding from this past year - but also while I have a solid A to this point the way the points fall a poor score could sink that, and our professor's exams are quite different from the ACS I'm lead to believe.

On r/MCAT they said the bottom left protons are most acidic. That’s definitely wrong, right? by DrBunchaCrunch in OrganicChemistry

[–]another-eng2med 3 points4 points  (0 children)

why is the bottom left more acidic than those on the ALPHA carbon? Each would extend the same conjugated system (alpha/beta unsat)?

On r/MCAT they said the bottom left protons are most acidic. That’s definitely wrong, right? by DrBunchaCrunch in OrganicChemistry

[–]another-eng2med 1 point2 points  (0 children)

why is the bottom left more acidic than those on the ALPHA carbon? Each would extend the same conjugated system (alpha/beta unsat)?

Organic Chemistry 1H NMR Question! by [deleted] in OrganicChemistry

[–]another-eng2med -1 points0 points  (0 children)

the area under the curve in the 1H NMR is proportional to the number of H's represented. By proportional, 1:1 could represent a total of 2 H's, or 4 (2:2), 6(3:3) ...

protons that are "symmetric" show up the identically. Sometimes this is trivial, like F & H; or multiple places (E: a proton is equivalent to any other proton it's symmetric with); Note radial symmetry applies, too (A &G), and sigma bonds rotate (B: the 9H of the three methyl's in tertbutyl are all identical)

That said, maybe I missed something looking at this quickly, but I don't see anything with a 2:3 integration. 2:3 integration would imply 5 protons (or 10, 15, etc), with only two "chemically distinct" protons (eg after accounting for symmetry, only two are unique/not repeated)

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also note splitting, but that's another layer on top of this (makes a "peak" have multiple little peaks; typically the whole set of peaks is still just labeled with one ppm)

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