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Chemistry

Anonymous Wed 23 Dec 13:58:18 2020 No.12499070 View Reply Original Report

Quoted By: >>12499080 >>12499203 >>12499259 >>12499695

hey my professor wasn't that great at explaining the process of calculating the molarity of the base (aka I wasn't listening) can someone help me? thanks

Anonymous

Anonymous Wed 23 Dec 2020 14:04:50 No.12499080 Report

Quoted By:

>>12499070
M = moles/liter

Anonymous

Anonymous Wed 23 Dec 2020 15:00:55 No.12499203 Report

Quoted By:

>>12499070
$V_1 c_1=V_2 c_2$
$c_{1}=\frac{c_{2}V_{2}}{V_{1}}$
c2/V2 is concentration/volume of titrant, and V1 is volume of analyte.

Anonymous

Anonymous Wed 23 Dec 2020 15:21:30 No.12499259 Report

Quoted By: >>12499275

>>12499070
Mole is 6*10^23
(it's just a number, even though it traditionally has a narrow field of application)
I survived school without having a slightest idea what mole was, and one kid at similar imageboard managed to explain it to me in one sentence.
And it only gets weirder weirder from here: it seems some powers don't want us to understand this field:
https://pubs.acs.org/doi/pdf/10.1021/acs.jchemed.9b00467

Anonymous

Anonymous Wed 23 Dec 2020 15:30:19 No.12499275 Report

Quoted By: >>12499292

>>12499259
A mole is just the average approximate number of atoms that have a mass in grams equal to the atom's average atomic mass.
It is a way to go back and forth between mass and particle count.
1 mole of hydrogen is about 1.008 grams.

Anonymous

Anonymous Wed 23 Dec 2020 15:38:16 No.12499292 Report

Quoted By: >>12499309 >>12499555

>>12499275
>A mole is just the average approximate number of atoms that have a mass in grams equal to the atom's average atomic mass.
It is not the most confusing explanation I saw, it's not even close. Russian textbooks managed to give it in at least fifty sentences without even giving the actual value, or when it appeared it attributed to Avogadro number and was mole^-1 which also didn't help.

Anonymous

Anonymous Wed 23 Dec 2020 15:48:31 No.12499309 Report

Quoted By: >>12499331

>>12499292
Bro this is literally chem 101

Anonymous

Anonymous Wed 23 Dec 2020 15:59:40 No.12499331 Report

Quoted By:

>>12499309
And I somehow got my diploma without having a clue.

Anonymous

Anonymous Wed 23 Dec 2020 17:37:37 No.12499555 Report

Quoted By: >>12499560 >>12499621 >>12499689

>>12499292
a mole is 6.02214076×1023 objects.
a mole of hydrogen (H2) is 6.02214076×1023 molecules of hydrogen, a molecule of apples is 6.02214076×1023 apples, a molecule of rockets are 6.02214076×1023 rockets.

6.02214076×1023 is called the Avogadro Number.

The formula for mole is mass / molar mass
The formula for molar mass is mass / Avogadro number

Anonymous

Anonymous Wed 23 Dec 2020 17:38:39 No.12499560 Report

Quoted By:

>>12499555
didn't copy properly the exponent, I meant
6.02214076×10^23

Anonymous

Anonymous Wed 23 Dec 2020 17:57:49 No.12499621 Report

Quoted By: >>12499843 >>12499849

>>12499555
The formula for molar mass is average atomic mass

Anonymous

Anonymous Wed 23 Dec 2020 18:16:18 No.12499685 Report

Quoted By: >>12499708

does anyone find chem much harder than math bio physics stats computer science and anything else theyve tried to learn ?

i gave up on high school level chem but ive made it really far with math and i passed physics with ease

Anonymous

Anonymous Wed 23 Dec 2020 18:17:51 No.12499689 Report

Quoted By:

>>12499555
checked

Anonymous

Anonymous Wed 23 Dec 2020 18:20:39 No.12499695 Report

Quoted By:

>>12499070
>aka I wasn't listening
Yeah, someone can help you. Your professor, now go back in time and fuckin listen

Anonymous

Anonymous Wed 23 Dec 2020 18:23:39 No.12499708 Report

Quoted By: >>12499726

>>12499685
for me bio chem and math were easy but physics was really hard
maybe different types of skills between physics and chem?
I found chem a lot like solving equations and it made sense to me
but physics felt like a bunch of arbitrary rules before I could do the math so I could never figure out what equations to use

Anonymous

Anonymous Wed 23 Dec 2020 18:28:03 No.12499726 Report

Quoted By:

>>12499708
Yeah physics is about problem solving and analytical thinking, Chem it's mostly memorization and rarely deriving results from first principles, until pchem, which is usually poorly handled or belittled

Anonymous

Anonymous Wed 23 Dec 2020 19:09:32 No.12499843 Report

Quoted By:

>>12499621
yeah that's another formula for when you have the output of an elementary analysis

Anonymous

Anonymous Wed 23 Dec 2020 19:10:47 No.12499849 Report

Quoted By:

>>12499621
of course molar mass of (object) is mass of 6.02214076×10^23 (object)

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