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- เผยแพร่เมื่อ 6 ก.ย. 2024
- View full lesson here: ed.ted.com/less...
The word "mole" suggests a small, furry burrowing animal to many. But in this lesson, we look at the concept of the mole in chemistry. Learn the incredible magnitude of the mole--and how something so big can help us calculate the tiniest particles in the world.
Lesson by Daniel Dulek, animation by Augenblick Studios.
Every time he says "unfortunately", it sounds like "fortunately". Threw me off!
Fortunately Avogadro died in 1856
Big difference between fortunately and unfortunately I wish he’d speak clearly
Nope, sounds legit like fortunately
Did he even said unfortunately?
Ok
He was my high-school AP Chemistry professor! I know of very few chemistry professors who could only begin to rival his passion for, and knowledge of, the subject. I'm a Biochemistry and Molecular Biology major in college now because of him. Thank you, Mr. Dulek!
wow awesome
I thought u were talking about Lorenzo Romano Amedeo Carlo Avogadro at first
@@iateuranium-235forbreakfas7 xD
@@iateuranium-235forbreakfas7 lol
That’s wonderful! A great master makes a great student. Thus the cycle renews
Why do people finally like a persons work after they’re dead
FISHY EVERYTHING their not liking them because there dead. They're do you get it?
RIP English
"Why do people finally like a person's work after they are dead?" Please, do not rage, I corrected you simply because I learnt English in TH-cam this very way :)
But Why 6.02 * 10^23 and not 602 * 10^21?
that's the standard form of writing extremely large or small numbers
The penny analogy literally blew my mind!
Honestly! I also laughed at the baby lol
Funny thing is, he stole the concept from someone.
answers.yahoo.com/question/index?qid=20081115172343AAKoVWM
+Vayne Hellsing Unless it's a coincidence
Saili Liao It's word for word the same.
No way it's just a coincidence.
Vayne Hellsing There's still a chance, albeit a tiny one
I wanna be a moleionaire.... XD
LearningLife lol
I want Grahams number in milipennies
I'd be happy with Avogadro's number of millipennies. But they'd have to be notional, rather than actual, because storage would be a huge problem.
Not so fast
If you had a mole worth of money, the amount of money in circulation would multiply by a couple orders of magnitude and would cause some extreme hyperinflation so your money would be worthless
Who doesn't
Feel sad for Avogadro!
+Fay Miller *bad
Saili Liao whatever
+Saili Liao (saili6)
Sad is also ok tho.
It still makes sense
me too, but now everyone knows his name
Balthier TSK *though *makes
Yes I am doing this on purpose
I need a mole of money...
Ok, I'll give you a mole of Hungarian Pengö, which, according to this: www.globalfinancialdata.com/gfdblog/?p=2382 (and assuming I'm doing the math correctly) was worth just over one tenth of one US cent in July 1946.
Adam Weishaupt still very worthy it!!! How do you want to transfer the money?
Someone copied this 4 year old comment 2 years ago
You, a Russian?
Adam Weishaupt so what you are telling me that if I time traveled to 1946 and gave a Hungarian 5 dollars their economy would crash due to inflation
I feel it's relevant to mention that the reason the mole is so important is because it's the conversion factor between amu (the mass number on the periodic table) and grams. That's why a mol of water weighs 18.01 grams and a single molecule of water is 18.01 amu
Im going to pretend i understand. 😭😭😭😭
This is the type of stuff that came out of the mouth of my chemistry teacher which made it completely impossible to grasp.
@@Joel-zo6yo -
I just show my kids
(12 amu in grams)(mole)=12grams
Solve for mole and you will get avogadro.
@@teacheschem
Do you make the “slower” students stand at the chalkboard/whiteboard and try to work out equations?
This is such a good explanation. I’m doing HSC chemistry and one of the things I revisited was the definition of a mole. My prof is usually well versed on practically anything but when I asked him this there was a surprising doubt. Not because he didn’t know of course, but it was hard to translate to words. This does that beautifully
A balloon at 0deg C and a pressure of 1 atm has 6x10^23 gas particles - nope - only if the volume is 22.7 L
nope, it is 22,41 l
Lectiuss ur right it's 22.414 l in
1atm and 22.7 in I bar pressure.Now the latter is the stp.
You can change the volume without changing its temperature or pressure
Koha Raisevo but then you are changing the quantity of particles which is the whole point
A slight correction: volume at STP=22.4 l
3:19 if you are comign from WSB
what is a wsb
@@Poolie West San Bruno (don’t tell him)
💎💎💎 😎😎😎💎💎💎
@@vincent67239 no its wall sand beach
I came here to see the WSB logo inspiration character. reddit confirmed it's from here 3:18
lol
3:17 who read that wrong just like me?
Me to 😝
How
What?
a mole of penises?
Me 😂😂
Actually his full name is
Lorenzo Romano Amedeo Carlo Avogadro di Quareqa edi Carreta😌😌
NCERT?
Ohhhhhhh myyyy goood
Dude, thank you. I was having trouble trying to explain a mol for a Chemistry lab. Much appreciated!
Immortal Blazer mol is the correct abbreviation for mole
Sources- AP Chemistry student
@@nicksabahi6551 mol is the shortened version of mole. Chemists will do anything to shorten a word, even if it means only dropping 1 letter
i can explain it better
He didn't mention about the relationship between the mole and the atomic weight. For those who couldn't understand why it's 6.02*10^23, let me tell you. Chemists made a so-called atomic weight. They decided that the atomic weight of a single Carbon atom, which has 6 protons and 6 neutrons, would be '12', and the rest of the atoms' weight would be decided by the relative weight of the Carbon. The atomic weight is pretty neat; almost every atom has a integer weight except a few (of course they are not perfect integers. They are very close to the integers, like 26.982; the atomic weight of the aluminium). If you take 6.02*10^23 numbers of an atom, there will be exactly 'the atomic weight of the atom' grams of the atom. For example, If you take 32 grams of an Oxygen atom, which has 16 atomic weight, there will be 2*6.02*10^23 numbers (=2 moles) of the Oxygen atoms.
Thnx
That's a lot of fucking doughnuts
Yeah,i guess so you're gonna need a lot of coffee
+Parallax77 you're gonna need a Saturn to put all that coffee
+John Yyc You're gonna need a star to pull that saturn
Enough to give diabetes diabetes
Just Enough!!! for diabetes. It can give diabetes to a whole country twice!!! or even more!!!
If anyone wondering that why that 6.02 * 10^23 is selected or why it is needed, So the answer is that by multiplying with this number to atomic weight of individual atom we get the value which lies in easily calculating ways for studies.
Ex. 6.02 * 10^23 H2O molecules weight is 18 u.
6.02 * 10^23 O2 molecules weight is 32 u.
So we get our answer in exact numbers, not in fraction and not in thousands or in decimals.
U should have explained mole concept a little more.Like,why 18.01 ml of water is one mole?
the mole is defined so that one mole of hydrogen atoms (which weight 1u, atom mass unit) has a mass of 1 gram. Water has one oxygen atom (16u) and two hydrogen atoms (2u total) which adds up to 18u.
Is that mean that 18ml has 6.02*10^23 but how to have 1 molecule of water then how much does it weight?
Ahmed Mohamed 18/6x10^23 gram. Which equals 3x10^-23 gram
RAGHURAM .R thank you but how will it be its voulme and what about one drop of water is all matters have the same voulme of 1 mole ?
cuz the atomic weight of water is 18.01 lol
Hey Ted, can we have our baby back? Thanks - everyone on WSB
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LugnutsK BULL TRAP SPY 7/17 180 PUTS
howd that work out for u
i don't see mark and expiry
other than the analogies and learnings i really love the animation. you guys never disappoint with the animation so thank you !
whos watching this in chemistry.
Same here
Same but do you think we can find moles in food??!
Like I’m doing a project I need to know how tall is a mole of tacos? Is that possible to find ?
I need help 🏃🏻♀️
Me
This didn't explain it very well. A mole is the amount of atoms in twelve grams of carbon twelve. in other words it is the number of atoms required for something to weigh as much as its molecular or atomic mass.
Najey Rifai that is for molar mass
Nope, that info helps understanding better. One might wonder where the Avogadro's number comes from. It is the conversion factor between grams and atomic mass unit.
The two explanations reach the same end point, one of them is purely scientific which is hard for people just starting chemistry to understand, and then there are the ones in the video
Yes but people new to chemistry won't understand it, that defiant ion won't help person understand a mole is it would rather confuse them
Yeah, I actually learnt that definition at school. But there is a problem though. We will then have to prove that Avogadro for every element is the same number!
Strange in chemistry class we call it a mol , without the e
+TheMonyarm mol is the SI abbreviation for the unit, while mole is the English name.
"Mol" is the unit abbreviation of mole, just like "m" stands for "meter" and "g" stands for "gram".
it's actually the symbol for it's unit.... "Mole" is the unit and "mol" is the symbol for the unit.... just like kg for kilogram
Congratulations on confusing me about something I already understood quite intricately.
Same
Savage😂😂😂
It explains it pretty well
Same :'(
Same... they confused me by showing so many cartoons and also the mole(animal one)
3:19Thats the WallStreetBets logo!
A ream of paper is actually anywhere between about 475 and 510 sheets. They do it by weight, which can vary in different runs. (might be by thickness, but same problem)
And yes, the average is intentionally a little below 500.
Who is the animator .. he/she is toooooooooo good in their field like tht coffee planet or the aunts mole ... SUPERB
Qaima Ali Animation by Augenblick Studios (It is in the description)
ikr!!! the ted ed animators are like crazyyy good!!!1
The penny example BLEW MY MIND. wow
2:21 Love the mole chilling out! 🥤
Thank you for this video, I can still remember my High School Teacher yelling at because I didn't comprehend the concept of a mole. Here's to you Mr. Nagasaki.
You are here for 3:19
its a very good DD
I really like the way you picture the scale of things and put them in clear perspective . Thank you so much for sharing the knowledge ...
moles grow to 4.4 to 6.25 inches (11.3 to15.9 centimeters) long from snout to rump. Their tails add 1 to 1.6 inches(2.5 to 4 cm) of length
They also grow up to 6.02x10^23
nuh uh@@kneelingfish437
1:04 The moment when I was giving my revision report to my laboratory assistant
Formulae for mole: No. of particles/Avogadro's no.
Volume of liquid substance/22.7L
I love this animation! My favorites are the recurring mole and Avagadro's sideburns. I wish I had a mole of pennies!
Finally, I can understand moles!!
I like the way the represented a very hard to understand concept thing in a humourous way, just to makr the the video exiting and less boring. Keep it up guys! Your channel is very unique like our earth
Also called as Avogadro Constant
WSB has brought us all together over here. SPY 7/17 180p
1. Because one wants to be precise, but not overly so. 10^23 is rounding it too much. A bit like rounding 60 to 100, when there's still 40 too many.
2. Comes from the word molecule, which means 'extremely small particle'.
I knew the ream of paper was 500
Andromeda Gaming I’m so proud
Me too
Good for you
I wish my teachers of the difficult subjects in high school could have made learning fun and interesting like this.
I never could understand the concept of a mole or Avagadro’s (sp?) number. I dropped chemistry because the teacher couldn’t explain it below the level of the smartest five students in the class and the textbook was worthless. I wanted to understand it so badly but I just couldn’t get it.
On a lark, I was thinking about that today and decided to look it up. Forty-two years later, it finally makes sense to me, because it was simply explained. Thank you, TEDEd!
CHANGE THE LOGO BACK WSB.
3:20
who's here after the Wallstreetbets drama...
I suggest to make a lesson about the "PH level"
I always write the same thing;
Your endings are loveable.
I loved your explanation 👏👏👏i like simple and quick information, it completely entrenched in my mind
Me parecio muy interesante como utilizaron el término mol para refecirce a las grandes magnitudes de moleculas y simplificarlo mejor
TIL thanks wsb
We used 6.022e23 instead of 6.02. The wikipedia article on it says 6.02214179(30)e23.
I don't know why the 30 is in parentheses.
It's often shortened to "mol". Chemists like being concise.
The atomic weight is how much grams a mol of that atom is (as well as the average atomic mass in the atomic mass unit). E.g. Hydrogen being 1.008 grams/mol of Hydrogen atoms.
IV crushed :,(
i finally learnt how to buy my 43 pieces of salami at the grocery store thanks to you!! thanks so much!!!
a great presentation
really useful for students to get the idea ... comparing it to other simpler examples
According to Az tecnology, if the mass is not too hot, & doesn’t dip into chili temperatures, the borderline number of atoms in one guaca-mole can be determined by avacadro’s number.
who else is here just bc of school
Me lol
Thank you, Daniel Dulek, I now know how to buy salami at the grocery store, very cool.
My teacher showed us this video it really helps. thank you ted-ed.
The exact number, however, comes from the definition of atomic weight. The atomic mass unit (also known as 1 dalton) is defined as 1/12th of the mass of a carbon-12 atom, which has 6 protons and 6 neutrons. 1 gram divided by 1 dalton is Avogadro's number.
Man if only I could picture a mole
"If you had a mole of donuts it would cover the Earth to a depth of 8 km"
Ah yes, I can definitely picture the Earth covered in donuts to a depth of 8 km.
Gosh the narrator voice is so Calm...
wow!!!!! nice explanation why dont our teachers give us same explanation
The donuts were only coating the earth to a shallow relatively shallow depth whereas the basketballs were actually replacing it. The earth about 6 hundred times deeper to the centre than the figure he quoted for the depth of the donuts.
3:25 inflation?
Thaaannkk you!! The animations made it easier to understand 😄
3:16 who else mistook pennies for something else on the first read?
Me lmao
yeah i mistook that for pennies in currency, now i know what it meant, thanks.
thanks! your vid really helps me teaching mole concept
Avogadro's character design looks like it was from The Critic.
Avogadro's number is, roughly, 1 gram divided by the mass of a proton or neutron. Since the majority of the mass on an atom comes from the protons and neutrons, the number can be thought of as how many neutrons and protons are in some amount of stuff.
There are some caveats to that, of course, since neutrons and protons don't have the same mass, we're ignoring electrons and the binding energy in the nucleus, among other things responsible for the total mass. But that's the rough idea.
No mention of the whole, 'as many units, (molecules, atoms, etc.), as there are Carbon atoms in 12 grams of Carbon 12'? Or Oxygen atoms in 16 grams of Oxygen?
Muy buen video, explicando a detalle y mencionando al que descubrió las bases de la teoría atómica en cuanto al estudio de los compuestos orgánicos, saludos
Good Morning - Hi friends, today, 23rd, October is a special day for chemists and chemistry teachers across the world. All the digital clocks read (6:02 10 23) two times tomorrow, at 6.02am and at 6.02pm. It looks like Avogadro constant. Hence chemists across the world celebrate 23 October as 'International Mole Day's. Take it to the students and make them aware of it...
Details of the day:
Celebrated annually on October 23 from 6:02 a.m. to 6:02 p.m., Mole Day commemorates Avogadro's Number (6.02 x 1023), which is a basic measuring unit in chemistry. Mole Day was created as a way to foster interest in chemistry. Schools throughout the United States and around the world celebrate Mole Day with various activities related to chemistry and/or moles.
For a given molecule, one mole is a mass (in grams) whose number is equal to the molar mass of the molecule. For example, the water molecule has an molar My mass of 18, therefore one mole of water weighs 18 grams. Similarly, a mole of neon has a molar mass of 20 grams. In general, one mole of any substance contains Avogadro's Number of molecules or atoms of that substance. This relationship was first discovered by Amadeo Avogadro (1776-1858) and he received credit for this after his death.
Who all aware of this ??
I don't know why they didn't explain it in the video, but he based it upon 12 grams of pure carbon-12 (other simple elements like hydrogen and oxygen had uncertainties, hence the use of carbon). If you have exactly 12 grams of carbon-12, there are 6.02214179...×10^23 elemental entities, or atoms, in that substance.
My my my, I laughed the whole time...man, what an awesome sense of humour...
It’s dark humor he never signed autographs course they never accepted him when he was alive
Nice presentation, but I still have a few questions:
1. Why is the mole such a specific number. Wouldn't just 10^23 suffice?
2. Is there any reason to why it's called a mole?
well it certainly aint a video that would bore you entirely LOL
3:16 Molecular LLC
1 Particle Street
USA
6/10/1023
A mole of pennies
Me: hey where do you got all that
2:09 still laughing 🤣🤣
You're the first person I've seen on TH-cam with the same first name as me.
This can be used in volumes too, one gram of water = one ml of water. But that's sort of like working backwards.
Misleading title: I thought you meant the ones on your skin.
that’s your fault sir
1:56 - *This video is helpful but the molar quantity still seems so random.* 🙃
I like how when he tries to explain that 18.01 ml of water is 1 mol even the molecule guy is confused why this is such a random value 😂 Why not use something nicer & easier to remember like 10 ml or 100 ml of water? Heck, I'd be happy with an even 18 ml! Was this chosen because this the particular resulting molar value is just very good at measuring things (if so how is it better than other potential resulting molar values?) or is there a better explanation of the derivation that did not come from an arbitrary volume of water?
18.01 is the atomic mass of a single molecule of H2O, so the mole is an easy way to convert from very large quantities of things (the number of molecules in a substance) to a very small thing (atomic mass)
WSB YOLO GANG
Man if only Mr. Dulek had a video appear everytime he talked than I might not be bored in class anymore
WSB YOLO
Just learned about this in school and was a little fuzzy about it. This cleared it right up! Thanks!
This video wouldn't have enlightened schoolkid-me to the concept or the thought-process behind "a mole" (Why/how Avogadro thought it up, how it is useful/applicable, and why it is significant). The furry-creature, doughnuts, post-mortem dancing and basketball analogies/anecdotes merely detract from the subject-matter.
+Aditya Mehendale I think it does a good job, I didn't get confused or distracted by the furry-creature or doughnuts, instead it put it in perspective.
+Aditya Mehendale The video isn't dedicated to explaining the mole's reasoning, but rather seeks to get a feel for how large it really is. The mole is significant because it allows us to convert from atomic mass to grams. 1 mole of any atom weighs its atomic mass but in grams. For example carbon's atomic mass is 12.011 atomic mass units. If you had a mole , or 6.02 * 10^23, of carbon atoms, it would weight 12.011 grams. This allows chemists to calculate aproximately how many particles of a substance they have based on the mass.
+Jed Nixon Thanks, I'm sure you mean well, but I was a schoolkid many many *many* years ago. What would have interested me, back then, is not *what* Avogadro's number is, to the 16th digit behind the decimal, but rather *how* Mr. Avogadro (with the limited resources available to him in his time) actually came to determine this number, what thought experiments he must have done to reason this out etc. What bothers me about this video is the presumption that the viewers would want the 'dumbed down' version of the story and the inane factoids about Avogadro's number (just like I would be when someone recites Pi to the 2000th place without having a clue about what Pi stands for). What also bothers me, is that at the daVinci museum in Florence, kids are forbidden to touch and play with (replicas of) daVinci's designs, being asked instead to look at animations on tablets - but that's another discussion ;). Free video on 'teh Interwebs' - can't complain much, right?
well Aditya Mehendale i agree with you but this is a channel who do mostly short video's "sadly", they are here to entertain us. And making a 2 hour long lecture with some "boring dry matrial" would scare off most, me included.
what-if.xkcd.com/4/
Thank you for your response but something that makes me ponder is how Avogadro was able to get this number with much accuracy. Because of the super small atoms and protons, how was he able to formulate this number.( a link for further research or a direction to start in would be enough)
Avogadro didn't come up with the number. It was just named after him because of the contribution he made.
1.000.000 $ every second for 100 years...and you still didnt spend even a percent of a percent...just let that sink in for a second
As a student, I did not appreciated the beauty of mole. Now I do. After 50 years!!
It could have been more useful if you explained how they came up with the avogadro's number.
Now let me be a gad-fly and point out one thing:
If you have a balloon of any gas at 0°C and at the pressure of 1 atm (inside the balloon) then you have precisely 602 sextillion (6,022 141 79×10²³ ± 0,000 000 30×10²³) gas particles if the internal volume of the ballon is (approx.) 22,414 litres (molar volume of an ideal gas is 22.414 L/mol under these conditions). It won't work with just any balloon.
Tell me if I'm wrong.
BTW: That example with money is amazing and just stunning.
Funny and educative.. Like all my teachers, not
not, and who else? edit nevermind i get it
You need a sense of humor if u think that was funny
My teachers always explain it in such a bizzare manner telling us that it is just a unit of measuring matter's quantity 😒🙄😬 feels like my teacher also got her mind blown when she knew the penny's analogue 😒🙄🙄
@J You should have looked it up
@@m1cra848 Maybe you need it more than I do
thank you so much. i never knew how to buy salami ever since i completed this video. now i can buy salami with confidence.
WallStreetBets sent me here..
Very good and funny and informative at the same time! Excellent narrator!
💎🙌
Superb class it really helped me a lot