GCSE Chemistry - The Mole (Higher Tier) #25

[@Cognitoedu]

If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

[@coolguy5710]

4:21 🎉

[@barnaba.climbs-qn7he]

excuse me but i would like to know if we would be given 'avogadros constant' in our exam papers?

[@hannahrich4461]

If it helps anyone, I've always been taught to remember the equation as Mass = MrMoles (pronounced like a name) and then its not to hard to rearrange from there :)

[@xfreja]

ahh thank you!!

[@assia__MAcookie]

I learned it by saying " massive Mr mole"

[@No1No1No1]

Wow thanks

[@Deliah222]

So mass = mr x moles ?

[@No1No1No1]

@@Deliah222 right.

[@riamathur9907]

THIS TOOK U LIKE 5 MINUTES TO EXPLAIN WHEN IVE BEEN AVOIDING THIS TOPIC FOR A WHOLE YEAR GOD BLESS

[@Cognitoedu]

YAY 🙌

[@ding5151]

TRUE OML

[@beepboopbeep111]

Every time I look at this topic in my chemistry book, I cringe on the inside because the last time I tried to cover this topic, I physically cried because of how stupidly difficult my teachers and the book had made it. Thank you for this, you are truly my savior, Cognito.

[@michaltam6694]

Me too! Are you doing your Chemistry GCSE this year? I have my Chemistry mock tomorrow - my school decided to do them early... 😥

[@beepboopbeep111]

@@michaltam6694 omg that's so unlucky. I'm in yr 10 but my mocks are at the end of the year. How did your exam go?

[@michaltam6694]

@@beepboopbeep111 I'm in Year 11 and it SUCKS. Everyone is so fed up of stressing the whole time. I think I did good, but I haven't gotten the results yet so fingers crossed!

[@gazey]

@@michaltam6694 have you received it yet?

[@michaltam6694]

@@gazey Yep! I did good, considering I was VERY ill and went to A&E that day. I got an 8! 😊

[@gracebryony8134]

I feel like I've been working through all your playlists in preparation for my mocks!!! I know it's commented on every single one of your videos but they are so helpful, well-explained and pretty to watch. I really hope your channel gets seen by more people and gets the recognition it deserves ☺️

[@Cognitoedu]

Hiya Grace thanks for such a lovely comment and really happy to hear they’re helping you out! Hope all your work goes well and you get the results you’re after! 🙌

[@tigress0076]

I’m doing the same thing - I have my chem mock tomorrow, hopefully it goes well :)

[@a.nn_ie9536]

What did u get xxx

[@tigress0076]

@@a.nn_ie9536 I got a 9 - 97%

[@c2011-f1o]

@@tigress0076 How did you prepare? Just by watching his videos? I have a gcse chemistry exam and i want to get an a*

[@ding5151]

Don't you just love when you had cover teachers at the time you learned this and now digging up the net to understand that shit

[@littlehunter1955]

I am in my second year of ME and decided to have a quick look at good ol' chemistry. We were always told to just memorize avogadros number and memorize the formulas, this is the first time I have ever looked at anything you talked about the same way that you explained it and now it just stupidly makes so much sense. Thank you.

[@ashleyminder]

i missed a class and they covered moles. i tried asking my peers and teachers for help but ended up super confused. this channel has saved me and my exams multiple times and their website is amazing!!!

[@alyah67]

This is the first time anyone has explained moles to me and I actually understood.

[@Qualitycr00s]

THIS CHANNEK HAS HELPED ME OUT SOOOO MUCH DUDE UR AN ANGEL MAY GOD BLESS YOU. IVE REVISED MY WHOLE SYLLABUS FROM THIS CHANNEL AND IVE BECOME A GOOD STUDENT IN EVERY SUBJECT THANKS TO YOU.

[@buloobee]

Thank you so much for this. I had been struggling with this topic for so long, mostly because I just didn't understand anything behind the mole or why it had to be used in the first place, and this genuinely explained it so simply. Not a lot of people out there do what you do as well as you do it, so thank you. This'll be my go to channel when I'm struggling w anything 🤗👍👍

[@Cognitoedu]

Thanks, it’s really good to hear you’re finding them helpful!

[@sashiniabeywardana5077]

hii this is my first time commenting on one of your videos and i have to say it helps so muchh :)) we only just started yr 10 and i was slacking so much in chem, but i found your website and it is so helpful and i love how most of it is free!! you have to pay for the flashcards and the quizzes but the fact that everything else is free is just wow. im sorry i cant explain how happy i am, your content and everything is just so much better than anything else i have used!! thank you so so muchh

[@bandagesquanderingmachine679]

I've been trying to understand this for 2 years but you made it so clear, thank you.

[@praveendheergasi2734]

Guys, FYI Mr means the relative mass of the elemnt

[@abigailmohler6401]

THANK YOU i was so confused

[@MrYousufkhatri786]

or either relative molecular mass

[@japhethteklemichael1004]

no it means relative formula mass

[@Callia_Cat]

I owe you my life

[@palestinianlover123yt]

Ty for this vid 😭 As someone who wants to get an 8 I legit cried when we had this lesson bc the teachers fast and I had NO IDEA what was happening 😭😭

[@Cognitoedu]

Glad to hear it could help you out! Good luck with all your work 🙌

[@Lily-xd1tg]

ikr this topic is so hard!!!

[@palestinianlover123yt]

@@Cognitoedu ty :D

[@nikitadimitrov5042]

That’s sad

[@izzyx31]

Tomorrow is my sem 1 chemistry exams. This helps me so much

[@viperzoid]

I had 2 different teachers explain this multiple times, and i watched many many videos, but never understood it until now thank you very much ❤

[@staceylugada163]

Im doing IB HL chemistry for DP and I'm studying before school starts. I never learn on my own but this channel and video helped so much! THANK YOU!

[@Jennygirlie]

Good luck 🎉

[@laraib3068]

I’m quite glad to see a non-complex explanation of moles I’m quite motivated to continue chemistry seeing this chapter turn into one of my favourites

[@Cognitoedu]

Glad it was helpful! 🙌

[@JT_999]

this has thought me more chemistry in 4 and a half minutes than my teacher could in a year

[@asandalevels-sd6ox]

good job bro

[@Inspiretoday786]

This is the most underrated channel i have seen on youtube

[@SaadKhan-jm5rq]

come on guys we gotta make this man reach 1 million subs

[@prachishah491]

Hey this was an amazing video couldn't get my concepts any more clearer thank you so much + the illustrations were helpful

[@mirsadtatli3720]

simple, basic, understandable. Thank you!

[@drift4life413]

I got 18/20 on chemistry cause of you thanks you are truly wonderful

[@Leonestudy12]

i found this very useful. my teacher always makes learning chemistry hard I did not understand moles then but after I watched this video I fully understand how moles work:). i just hope I don't forget what I have learned.

[@ashi9859]

thank you so much for these videos, they are extremely helpful. I missed two weeks of school due to COVID and missed out on so many lessons since my teachers only provide the work but not an explanation on how to do it. But now I feel reassured that things will be okay~

[@PrestigePhoenix]

Good luck!

[@devashishsrivastava7590]

Thank you Cognito 😢❤ truly acted as a life savior 🙏 😊

[@habibacraftingplanet5925]

It's too helpful it saved me before my exam. He explains clearly

[@sallyrein4500]

these vids are perfect!! and explained so well! (thanks + i subscribed)

[@hasnesajjad]

I am so appreciate this channel exist this channel made my life easier and tomorrow is my chemistry exam .. wish me luck I am so happy 😀 cause this channel help me so much .

[@bobsamcot_506]

The way to remember it is: “The Mass of Mr Mol” in an equation triangle! Thanks Dr Ragni!

[@anna-zw2ce]

wait how does that work

[@bobsamcot_506]

@anna Number of Moles = Mass/Mr Mass = Mr x Mol Mass of Mr Mol: Mass Mr Mol

[@bobsamcot_506]

I hope that makes sense

[@zakkhan3270]

@@bobsamcot_506 yeah it does thanks

[@beamboy07]

mr mole lives under the mass

[@sub2adteczyt945]

I have played this vid over and over again and I’m still confused

[@sub2adteczyt945]

Nvm I understand

[@Cognitoedu]

That went well

[@ez-mn1vc]

@O no its not ur just *dumb* ig

[@dontviewmychannel2851]

LOOL

[@sundayisfunday1354]

@O They taught amazingly well. I think you don't understand simple english :(

[@liamjones496]

THANKKK YOU OMG im a private candidate for chemistry and have no teacher to explain these hard concepts to me 😭 this took 5 minutes and i feel like an expert in moles now tysm omggg

[@Cognitoedu]

Ah that's great to hear Liam, thankyou 😊

[@madeleinej6048]

Also a great way of remembering it is grams over RAM’s which is basically just mass divided by the relative atomic mass

[@RaitisDarznieks]

Glad i stumbled upon this channel

[@andreaincorvaja3003]

Or else you can do it by simple proportion as follows: Question: What is the mass of carbon with 0.1 moles (example) 1 mole of Carbon=12g 0.1 moles of Carbon= ?g 0.1*12/1 =1.2 g of Carbon with 0.1 moles Thanks for the vid it was very helpful.

[@DELL-j8b]

can yall do a vid on finding empirical formulae

[@VishalLakshmikanthan-r4z]

Bro they alr did, search it up lmao

[@squadman3376]

Brilliantt. The best teachers use many real life examples to drive their points home. The bad ones, get deep into the theoretical , abstract weeds....Thanks

[@aliyahrashid1059]

Thank you so much! I’ve been struggling with this topic for ages but now I finally understand it properly

[@Cognitoedu]

Ah that's great news, thanks Lethaseulin 👍

[@Teamlads777]

I scored good grade in chemistry because of you thank u soo much 🥺❤️❤️

[@Maniiscool92]

Tomorrow is my chemistry exam(promotional) and your videos help me alot with physics and chemistry I have not seen another person explain these better than u

[@Prime_Waleed]

mine tomorrow!😁😁

[@lexie1881]

I have my exams soon and ive been going through videos to help me understand chemistry (its my weakest subject) and these videos really help

[@mayyahun]

This is soooo helpful thank you, im really struggling with quantative chemistry even though my teacher has explained it to me so many times. Thank you so much

[@Cognitoedu]

Glad we could help Sumayyah 😊

[@briandimakunne2699]

Sir i think you are the solution, the final piece in the puzzle. Also, please more videos on organic chemistry thank you

[@lucianasfilms]

Am I the only one just not understanding this

[@sugi1992]

No bro me too

[@DanielHall-e6n]

Start from the beginning of the playlist

[@Cheddie25]

Just think of mole as the name of the number 6.02x10^23. Just like million means 1x10^6. If you have 1 mole of sodium it means you have 6.02x10^23 atoms of sodium. A useful point to note is that the atomic mass number is the number of grams (mass that you can measure on a scale for example) of that element you would need to weigh in order to have 1 mole of that element. Meaning 23g of sodium is the mass of 6.02x10^23 atoms of sodium. If you're doing this for GCSE don't get too caught up in the origin of the number. Hope this helps a little.

[@Mmaa_q]

No

[@MissMinkPink]

Me too girl me too

[@dronstrapp6754]

Anyone taking combined science and struggling w the chem part??😭but yeh, thanks for the help, you are super helpful g...life saver

[@hongjoongswife9672]

So the number of moles refers to the particles in a substance. So for example 1.25 moles of carbon refers to the amount of particles in it and also it's weight? Or would you have to use the formula. This topic confuses me

[@Cognitoedu]

No worries it is a bit confusing. Firstly, a mole is just a specific number. In the same way that a ‘dozen’ is 12, and you can have a dozen eggs or a dozen people, a mole is 6.02x10^23 of something. Remember that the mass number of an element (see it on the periodic table) is how much one mole of that element’s atoms weigh in grams. So if you know how much one mole of carbon atoms weigh (check the table), you times it by 1.25 to tell you how much 1.25 moles of carbon atoms will weigh. So essentially yep use the formula! Hope this helps 🙌

[@sarahy8540]

ayyyyy, i love your profile pic :)

[@Bonbon-mk7ox]

@@Cognitoedu oh my god thank you for that written explanation, I was so confused lol

[@lay_laa24]

thank you I understand so much better now! explained better than my teacher

[@fahimaakhtar3152]

i still dont get it pls explain

[@14-1]

Thank you so much this yt channel ❤😊is so useful.Cognito seriously teaches me more than my actual teachers😭 .It always provides all the content in textbooks! Have u thought of doing any required practices .that always one thing cognito misses out on and it would be super helpful if you covered that as well 😅.

[@Romo2055]

doing physics, this doesn't belong in physics annoyed me and finally understood it in 4 minutes, thanks now more physics!

[@sakura.__.sarah99okie25]

I scored almost my entire chem paper right because of this channel A1 student ❤

[@s4kurapink]

Thanks this video was really useful! Could you make more videos about moles please?

[@Xxxkska]

1:32 please respond, what is this? I'm so confused, how do you know to do 16x2?

[@akshayaravi2360]

hey, dont know if you understood now or not but still... 16 is the relative atomic mass of oxygen... you can find it in your periodic table. since oxygen is a diatomic molecule it has 2 oxygen atoms therefore to find the relative molecular mass we multiply 16 x 2... Hope you understood it

[@Xxxkska]

@@akshayaravi2360 Yeah I understood it after rewatching the topic, Really appreciate it, thanks, I appreciate it

[@akshayaravi2360]

@@Xxxkska great

[@ThanoSalt]

16 is the relative atomic mass of oxygen. And oxygen is an elemental molecule. Meaning it is in pairs. So one mr of oxygen is 16 and since its o2 there's another one, so 16x2 = 32. 32mr. Edit:my bad someone already explained it to you lol

[@Xxxkska]

@@ThanoSalt Thanks, I’m actually doing this in lesson as well, lol

[@redman8830]

I just found out that my chem teacher is a just bad at explaining things to me. I get it now thank you🙏

[@tomekdavies9529]

I love the moment when I can follow along and in 5 mins, I get a hard looking topic.

[@muhammadsaad4167]

Whenever i open.my books i get distracted. dont feel like doig the work someone help im in year 10 next year ive got the gcse's really worried about it. Please help

[@ahnafajmain4366]

i got the same prob, i get bored reading chem n bio i im in year 9 turning all devices doesnt help at all

[@lordofmysteries6436]

@@ahnafajmain4366 You have to enjoy learning from inside your heart. That's the only way. -When I was younger my mom used to confiscate all my devices and forced me to study in an empty room and it didn't work at all. I dozed off all the time and didn't study at all. -But As I grew older trapped alone with those books I grew interested in them; what was inside them? What is inside my body? How did heart work? what does the heart even look like? It pulled me back to reality from the world of games and the internet. -And now, she doesn't even need to confiscate my device, 1 month prior to the exam I lock up my devices by myself, and lock myself in an empty room, with my Books. Edit: My parents are not abusive, not even a bit. Some might've assumed that they're abusive as they locked me up in an empty room. I love them, they helped me to love books. And enjoy learning. And oh my god, I wrote too much

[@SD-qb6ft]

I'm in year 11 rn and i was like that in year 10 and 9 and i'd say i even am like that rn. Try and study stuff you did in class everyday at least study an hour for each subject every week. it may seem like a lot rn and you may feel unmotivated but trust me it is so worth it in the end. It won't be easy but as soon as you get the routine going you will get used to it and it won't be as hard. Also try the Pomodoro technique (the 25/5) and maybe after finishing an hour or two reward yourself with an hour or two of video games.

[@chemistrybysaadanwar]

Excellent teaching

[@iisray1828]

FINALLY I KNOW WUT A MOLE IS Thank you master cognito

[@jamsartjourney]

My problem with moles right now is using Avogadro's constant 6.02x10^23 to find molecules or mass or moles...its really confusing'

[@ALIHassan-tu8vw]

Is this also for igcse ???

[@jakeblinkk3453]

Thank you for making this video- very helpful!!! I subbed

[@norakzaikhan2999]

Thank you so much you solved the biggest problem♥️♥️

[@zatak3689]

Hello Sir why is Carbon chosen? Is it because of its abundance? Why not other elements, I can understand hydrogen gas cannot be used because it is a gas and not easy to contain in order to measure.

[@CosmoAston]

Got my test today I'm cooked

[@liammacarthur4112]

Same 🤝

[@trailpeakuk]

I've got my test 2day, I'll see ya in the gulag

[@naisha218]

haha US

[@SlightlyDislecsic]

Mock today for me

[@alijahballeza9039]

@SlightlyDislecsic mock for me Tommrow

[@ahlambakry6441]

Very simple... thanks alot🌷💜

[@ThanoSalt]

Thank you so much. I'm in 8th grade, and i found this very confusing at first. Thank you for helping me understand it easier, now i can finally move on to the next topic in chemistry 👍

[@Cognitoedu]

You're very welcome! Glad it helped 👌

[@mogowaii9730]

Wow this is confusing

[@ohar2099-dp4tf]

I don't understand the last part of the video (ratios part)

[@HindMohamad-yh1px]

Hello Mr Cognito. I have a question..where did you get 14 + (3x1)?

[@sarahmalik9181]

ammonia's chemical formula is NH3. The relative atomic mass of Nitrogen is 14 and Hydrogen is 1 (can be found in the periodic table). So the Mr is 14 + (3x1)

[@darsh2967]

Thank youuu, this explained moles so well

[@angelenergy333]

Mr mole lives underGround (The g symbolising mass (grams) So you can remember it as the triangle of grams (mass) at the top and at the bottom mr x moles

[@sophiazhang9997]

thank you sooo much for this video, it's just so helpful🤩

[@miliperez8028]

I love this videos!!

[@Candy-8448]

Maybe it was a bad idea to leave actually understanding this to the nivht before my chem1 triple higher exam but oh well, i understand it now :0 Was always super cinfused when anyone tried to explain it to me

[@safayousif8197]

You are amazing u saved me honestly

[@honiaumed6616]

Thank you sooo much,this was really helpful

[@sifjdfijdnfepijfwifwjiwfij4208]

Thank you this explanation was really useful :)

[@celest2336]

to remember the formula i was taught as Mr Mole lives under a pile of mass

[@22-Flo]

How to calculate the Mr of an atom?

[@beamboy07]

how do you make profits who funds this?

[@topten1444]

It's too good to be free isn't it :/

[@RB-nm3ko]

I hear it said that 602 hexillion of anything is a mole, however 602 hexillion cupcakes wouldn't have the same number of atoms as 12 grams of carbon-12 would it? I'm not just talking about the weight difference, but the number of atoms. Thanks

[@yellow.r0se171]

if anyone can help please do im a yr9 student doing a triple science mock exam in three days when calculating the mole of amonia i have no idea where he got the 14 and 3 from pls help!!

[@bandagesquanderingmachine679]

Ammonia's formula is NH3, so the atomic mass of Nitrogen is 14 and Hydrogen is 1 but since there are 3 hydrogen atoms, we multiply 3 with 1.

[@jaimearechabala8971]

My bro, it’s so useful cheers

[@faithandprosperity]

i have a question. what is the higher tier in gcse? i study o levels and there is no higgher tier

[@ilmadrawss]

Well explained ❤

[@SaadKhan-mq3iy]

This made my life easier.😊

[@gshepharda]

now we have to do moles on the combined (dual or trilogy or whatever u call it) course too :((

[@Dylan-qs3ev]

Damn. Not even the chem book can explain it that easily and make it digestable to a student.

[@Cognitoedu]

Thanks, glad to hear we made it a little easier 🙌

[@adidonnylad1133]

So is 6.02x10 to 23 a metric or a imperial measurement?

[@adidonnylad1133]

*an

[@nashyrg3523]

Why did u do 14 plus 3 x 1

[@mr.skyrim6361]

You teach so good

[@clibjub12]

i was just taught in 5 mins what my government hired teacher couldnt in 4 hours

[@jannatmirxa8773]

Amazing video 🤩😍🤩😍🤩😍🤩😍🤩

[@chillimilli4371]

Is this the only lesson on moles ?

[@BananaPro-os3po]

U saved my exams broo ❤

[@Princesssb]

I’ll come back after I’ve done my chemistry mock and then my gcse

[@aayannzz]

came back?

[@lebotaylor]

You are the best🙂

[@saisudhan-eh9iw]

I still cant understand , i have serious skill issue 😢😢

[@ney.aep1011]

Sorry bruv but Womp Womp 🤏😔

[@saisudhan-eh9iw]

@@neahahah sec3

[@wingie7863]

You are a God send

[@huzaifaamin3064]

Have my caie tomo and tgis is really helpful