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   🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Friday, 01-Mar-2024 13:40:54 JST 🎓 Doc Freemo :jpf: 🇳🇱

   Units are the cheat code to every physics/chemistry test. Once you know the units of your "known" you can usually derive almost any equation from simple logic. At a minimum it will get you close enough that you can remember the rest if you studied at least a little bit.

   I just walked an organic chemistry student through hat on a fairly tough problem. Just showed them how every unit for every known can infer an equation, and all those equations for all your known will either get you to a complete system of equations to derive your needed formula, or will at least get you most of the way there and you can fill in the rest with a bit of logic).

   It worked, we were trying to calculate morality for an acid when only the percentage by weight is given
   .

   • Embed this notice
     John BS (johnabs@qoto.org)'s status on Friday, 01-Mar-2024 14:38:25 JST John BS

     in reply to

     @freemo

     morality of an acid.

     Seems like you took a trip from chemistry into ethics with that one, though please do tell how you derive ethical maxims and cracked the “is-ought” problem 😂

     (But forreal, did you mean molarity or molality? They should know that well before O-Chem…)

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Friday, 01-Mar-2024 14:39:16 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • John BS

     @johnabs Molarity when you know the percentage by weight.

   • Embed this notice
     John BS (johnabs@qoto.org)'s status on Friday, 01-Mar-2024 14:46:51 JST John BS

     in reply to

     @freemo Gotcha, just wanted to double check what units since the typo was ambiguous.

     I used to teach dimensional analysis problems from the perspective of baking/buying stuff, and I got some of my nursing/agriculture students working out estimates mentally pretty quickly! It improved one girl’s test scores by a whole letter grade after the tutoring sessions, so I took that as a win :)

   • Embed this notice
     🎓 Doc Freemo :jpf: 🇳🇱 (freemo@qoto.org)'s status on Friday, 01-Mar-2024 14:55:17 JST 🎓 Doc Freemo :jpf: 🇳🇱

     in reply to

     • John BS

     @johnabs Good job!

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     tatzelbrumm@qoto.org's status on Friday, 01-Mar-2024 16:23:54 JST tatzelbrumm

     in reply to

     @freemo
     You should leave morality issues to woke cancel culture warriors.

     Doesn't hurt to troll them with a faux "Chinese" accent though.

   • Embed this notice
     Punica granatum (punaisetpimpulat@qoto.org)'s status on Friday, 01-Mar-2024 18:19:40 JST Punica granatum

     in reply to

     @freemo Chemical equilibrium constants are absolutely wild. The unit can end up with just about any number you can throw into the reaction equation.