The mole and Avogadro's number | Atomic structure and properties | AP Chemistry | Khan Academy

[@shivamgagad5674]

Kahn Academy is a revolutionary idea that transforms boring lectures from class and creates meaningful content that students are looking for. Clearly Khan Academy is revolutionizing the way we get and percive information.

[@ahaanhalwai6739]

It’s too bad their JavaScript course is outdated but the maths and chemistry is great

[@timhacin8393]

Somebody please give this guy a medal. His videos are one of the best things the internet can offer!!!

[@Hussain-re3bg]

Thanks, Salman you're a Hero to us!

[@andreamunteanu6459]

You re the teacher a lot of students dream to have!!

[@harshathkanadka1672]

True

[@thanhan8842]

very true

[@prasoonjha1816]

Sir I can't thank you enough, I was super confused in mole concept and Avogadro's Constant. My textbook gave just some equations without any good explanation what is mole, one can be 100% sure while hearing your lecture that his/her doubts will be clearly solved.

[@niajmorshed8245]

I'm in 4th year of engineering in Bangladesh and hardly have I found a teacher like Sal.

[@maxco3412]

You guys are saints I was struggling with this today in school today and here you are

[@RISpaceCase]

This was simple and straight to the point. I also use Khan Academy for my math classes, and it's always easy to follow. The color coding definitely helps keep things organized and memorable. Thank you so much.

[@mamtalall6750]

Excellent explanation. Thank you Sir.

[@prasheetaaa_20]

Understood! Thanks 🙏

[@kazmix2321]

You are the best !!!

[@SajedeTahmasebi-zl8gh]

You teach things in a super awesome and understandable way🩵🩵

[@ditoo2002]

I'm literally taking this rn in school, we haven't reached the calculation part yet, we're doing more ratio though.

[@maxco3412]

I'm doing it in college and we just started as well

[@ditoo2002]

@@maxco3412 interesting, good luck.

[@Mina-xo6ii]

@khan Academy please do lessons about PLS (partial least squares regression)

[@reddevil0609]

How does the calculation from avg. atomic mass to g give us Avogadro's Number though?

[@AliceYobby]

So, the atomic weight of hydrogen is 1 because it has one proton. A mole of protons, would also equal a mole of hydrogen atoms, which would equal 1 gram. Because there are on average, 6.94 protons and neutrons in any amount of Li, a mole of atoms of Li would equal 6.94 grams. However, there are still a mole of protons and neutrons in 1 gram of Li.

[@jeetukumarkv]

thank u

[@roll28moainhabib72]

Amazing

[@simpleyasser2251]

I've never felt so confused

[@yousefshello582]

Why sir you put 4 as Unified Atomic Mass Unit instead of 3 for the Li ?

[@smokingterran6]

ok i got the part we need to find mol but i cant get the right answer. im using a TI-83 plus calculator, and i divide 0.0154/72.63=2.12E-4. not the answer of the vid 0.000212 what am i doing wrong on the ti-83 calculator?

[@andrewparesa5116]

Yes

[@0divide136]

why this channel has less views now

[@harshitajangir8521]

How many moles of electrons do we have in a kilogram of electrons?

[@pancake3321]

anyone hear the phone notification at 5:02?

[@moonlitelive6735]

and at like 5:23

[@moonlitelive6735]

@Charles Logan wdym? tommyinnit?

[@braidenanderson2669]

Dang, knowing that 1 gram of gold is less than a mole of gold, meaning 1 gram of gold is equal to a mole of hydrogen

[@AliceYobby]

There are a mole of protons and neutrons in one gram of ANYTHING :)

[@SoulReviving786]

Sir why u didnt mention the more easy and accurate formula for finding moles!

[@lucaspeck7995]

The Avogadro has a number!!!

[@alberteinstein6040]

I always hated schools but this, this isn’t school

[@konzeptwerks6710]

You did? Are you actually speaking for Albert Einstein !??!

[@SandeepKumar-yy8ey]

Mole concept definition

[@JavaAidTutorials]

I love chemistry..

[@jasonvegan5761]

Wow that’s a lot of aloms 😏

[@godxon_5648]

"Which is a lot"

[@hongyaness2580]

how 6.02214076 x 10^22 became 6.022 x 10^23 ?

[@hongyaness2580]

@@MV-sg9zh rounding doesn't change the power from 22 to 23

[@carsforkids3512]

I’m still confused 🤷‍♂️

[@shalinikurup7051]

S

[@cosmosapien6221]

How many atoms in a guaca-mole? Avocado's number!

[@mahnoorehsan6325]

lmaoo

[@OnurKeskinonurkeskin]

🇹🇷

[@ummehabeebah7153]

Pls try to do in urdu.that would be helpful for many students

[@Indyin]

GG

[@sudhirkushwaha7110]

Sir please hindi me bhi video please

[@truthcrusade8371]

Basically memorization and using tables, you don't explain sh*t in terms of how each term came to be and how each element ended up with all those numbers you are using. Teaching based on memorization is like catching a movie towards the end, it's like, what the hell happened here?!

[@AliceYobby]

If you watch the whole series in order you would have a better understanding.