/sci/ - Science & Math » Thread #12621981

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dumb chemestry question

Anonymous Sun 24 Jan 12:24:23 2021 No.12621981 View Reply Original Report

Quoted By: >>12622006 >>12622012 >>12622015 >>12622017 >>12622057 >>12622673

>asked /wsr/, no replies
Brainlet here.
How would you solve a chemistry problem like this?
I'm a layman trying to learn chemistry.

Is the first answer 5kg?
I don't know how you find the second answer.
Anyone mind explaining?

Anonymous

Anonymous Sun 24 Jan 2021 12:37:52 No.12622006 Report

Quoted By: >>12622027 >>12622051

>>12621981
Convert grams to moles using molar mass. Then use the ratio then convert moles back to grams using other substances molar mass.

Anonymous

Anonymous Sun 24 Jan 2021 12:39:34 No.12622012 Report

Quoted By: >>12622026

>>12621981
ever heard of this thing called stoichiometry?

Anonymous

Anonymous Sun 24 Jan 2021 12:40:53 No.12622015 Report

Quoted By: >>12622026

>>12621981
https://www.sparknotes.com/chemistry/stoichiometry/stoichiometriccalculations/section2/
also ask these questions on /wsr/ lol

Anonymous

Anonymous Sun 24 Jan 2021 12:41:55 No.12622017 Report

Quoted By: >>12622026

>>12621981
>nothomework2.png
seems legit

Anonymous

Anonymous Sun 24 Jan 2021 12:44:37 No.12622026 Report

Quoted By: >>12622027 >>12622031 >>12622042

>>12622012
no I havent.
>>12622015
I did. Nobody there can answer a question like this.
>>12622017
It's really not. I don't want to know the answer I want to know how to find it.

Anonymous

Anonymous Sun 24 Jan 2021 12:45:27 No.12622027 Report

Quoted By:

>>12622026
I explained it >>12622006

Anonymous

Anonymous Sun 24 Jan 2021 12:48:55 No.12622031 Report

Quoted By: >>12622051 >>12622201

>>12622026
then the FBI has been called
2840g?

Anonymous

Anonymous Sun 24 Jan 2021 12:52:38 No.12622042 Report

Quoted By: >>12622051

>>12622026
Then are you a terrorist

Anonymous

Anonymous Sun 24 Jan 2021 12:59:57 No.12622051 Report

Quoted By: >>12622061 >>12622073 >>12622334

>>12622031
>>12622042
I'm glad someone figured out the joke.
It's just a workbook problem I found from google images.
Instead of starting from the beginning I like to pick a hard looking problem and try to solve it, even if I can't I find I learn much faster this way.

>>12622006
So looking at the first problem,

4.6292 moles of UO2 = 1.25 kg of UO2?
How do I determine how much HF?
4.6292 * 4?

18.5168 moles = 370.4535 grams
so you would need 0.3704535 kg?

Tell me how wrong I am.

Anonymous

Anonymous Sun 24 Jan 2021 13:01:47 No.12622057 Report

Quoted By: >>12622063 >>12622074

>>12621981
For an easy overview, go look up "Organic Chemistry Tutor" on yewtu.be (youtube privacy frontend). I'll tldr the steps

1. convert grams into moles (mass given over molar mass)
2. Set up molar ratio
2b. i.e. X.XX mol of UO2 x HF/UO2
3. Get how many mol you need for compound in question
4. convert mole to gram by mole number x 6.022 x10^22
5. click in number
6. stop browsing /sci/, post these questions to /fit/ they have bigger brains.

Anonymous

Anonymous Sun 24 Jan 2021 13:02:10 No.12622061 Report

Quoted By: >>12622074 >>12622236

>>12622051
You forgot to convert kg to g and back again
Not doing the calculations for you but the structure looks right

Anonymous

Anonymous Sun 24 Jan 2021 13:03:26 No.12622063 Report

Quoted By: >>12622077 >>12622344

>>12622057
Step 4 is wrong. You use molar mass. Avogadro give you atoms not mass

Anonymous

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Anonymous Sun 24 Jan 2021 13:05:10 No.12622073 Report

Quoted By: >>12622079

>>12622051
>instead of starting from the beginng. You fucking nigger, you're obviously not smart and are a grandiose midwit. Everyone needs to learn from the beginning, you don't innately know theroies or mechanisms in basic STEM shit. This is called Stoichiometry and a kid taking grade 10 chemistry could calculate the limiting reagent here - fucking midwits get off my board REEEEEEE

Anonymous

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Anonymous Sun 24 Jan 2021 13:05:24 No.12622074 Report

Quoted By:

>>12622061
>>12622057
>Not doing the calculations for you but the structure looks right
Thanks that's all I was looking for.
I was going to go with this one but I thought the one about U and HF would get a chuckle.

Anonymous

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Anonymous Sun 24 Jan 2021 13:06:16 No.12622077 Report

Quoted By: >>12622078

>>12622063
fuck sorry, I just sat down to the pc from a bong session - tried my best lol

Anonymous

Anonymous Sun 24 Jan 2021 13:07:16 No.12622078 Report

Quoted By:

>>12622077
Yeah it’s np fren

Anonymous

Anonymous Sun 24 Jan 2021 13:10:46 No.12622079 Report

Quoted By: >>12622201 >>12622254

>>12622073
>This is called Stoichiometry and a kid taking grade 10 chemistry could calculate the limiting reagent here
I only had chemistry for a single year in highschool and we just learned what atoms were and had to memorize the periodic table with no context for what we were memorizing.

It's actually a lot of fun to jump into something you don't know anything about and try to tackle something really difficult.
I'm a big fan of puzzle games and doing stuff like this hit's that same itch.

Anonymous

Anonymous Sun 24 Jan 2021 14:05:28 No.12622201 Report

Quoted By: >>12622236

>>12622079
so what was the solution for a mid-wit?
>>12622031

Anonymous

Anonymous Sun 24 Jan 2021 14:23:27 No.12622236 Report

Quoted By:

>>12622201
Read the thread I already posted my second attempt at it. >>12622061
said I got it minus the conversion mistakes
Now I'm discovering the Avogadro Constant and reading more about stoichiometry. The solutions not actually important. This is what I wanted from the question.

Anonymous

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Anonymous Sun 24 Jan 2021 14:32:20 No.12622254 Report

Quoted By: >>12622260

>>12622079
>and try to tackle something really difficult
>9th grade chem tasks

Anonymous

Anonymous Sun 24 Jan 2021 14:34:18 No.12622260 Report

Quoted By:

>>12622254
It's difficult for me anon.
We all have to start somewhere.

Anonymous

Anonymous Sun 24 Jan 2021 15:06:10 No.12622334 Report

Quoted By:

>>12622051
>4.6292 moles of UO2 = 1.25 kg of UO2?
the molar mass is based on the unit g/mol. convert the uo2 in kg to g first

Anonymous

Anonymous Sun 24 Jan 2021 15:08:25 No.12622344 Report

Quoted By:

>>12622063
>You use molar mass
this. op can go to pubchem or some other website to find the molecular mass of substances.

Anonymous

Anonymous Sun 24 Jan 2021 16:39:00 No.12622656 Report

Quoted By: >>12622665

retard here

I'm supposed to write a chemical formula for the reaction of heating Copper chloride hydate until it turns brown (dehydrated)

is it just Cucl*h2o + OH -> Cucl or Cucl*H2O + heat -> Cucl?

Anonymous

Anonymous Sun 24 Jan 2021 16:40:59 No.12622665 Report

Quoted By:

>>12622656
I meant cucl*h2o + O2 in the first reaction I wrote obviously

Anonymous

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Anonymous Sun 24 Jan 2021 16:42:53 No.12622673 Report

Quoted By:

>>12621981

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