GCSE Chemistry Revision "Avogadro's Constant 1"
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- Опубліковано 7 вер 2024
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In this video, we learn how to calculate numbers of molecules and atoms using Avogadro's constant. This looks pretty tricky but it's fairly straightforward once you get the idea.
This video is based on the AQA spec. If you are following a different exam board then you should check your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
wow this is so simple-teachers over complicate everything i swear. Thank you and bless your soul
heartttt
great taste in music! ;)
fr
Yall are in college now lol, am still here in y10😢
It’s just the way they word it in the exam that throws me off...
same
MintyAviation Maybe try his book it might have exam style questions or you can try past papers
His revision books help a lot, I got an 8 in chemistry after using them.
so true
@@fireemperorzuko8756 are they really worth buying?
my head is filled with 'of moles of atoms in moles of molecules'
My chemistry teacher spent 3 lessons on this and it made no sense, took this man just over 4 minutes and I got it, THANK YOU
No problem. I'm glad that the video helped. Avogadro's constant is a tricky topic.
ayyy wsg blud@@Freesciencelessons
Just wanted to say, you’ve helped me get from a grade 5 in science to an 8/9! Thank you (::
J have like 10 days till the exams start how did u go from 5s to 9s cause I’m currently working at 5s and 6s in science and I really want 7s and 8s
@@TarteilHamza-ew3qm Chemistry is tomorrow but apart from the content, just remember the different equations for quantitative and do practise questions because they make the basics easy and then doing harder questions which sometimes you can’t understand especially under exam pressure.
I've got my Chemistry exam in two hours exactly and I've *just* understood this. Thank you so much!
@Cheez Dench They never reply :(
out here revising this and the triple topics the day before chemistry paper 1.
I was at a grade 4 in chemistry 5 months ago and since then i have gone to a grade 8 thanks to this guy
Watching this the night before my chemistry gcse as I can't sleep. Currently 5:30 in the morning. Last minute freescience lessons binge seems like a good use of my time. I gave up on sleep at about 4:00am. Thanks for all the revision videos, they are really helpful.
what grade did you get??
oh 2 hours to the exam and I've just realised our teachers haven't taught us this
how did it go?
@@sajamily2404 we will never find out
I wish u were my teacher
Mohammad Ouizi I don't think it's just down to the person it's more the method of accurate videos for me. He is great but it's harder to teach in a lesson
He is your teacher. You're learning, aren't you? ;)
Thank you so much for this. You give a slow step-by-step approach, which really helps people to understand things without getting and information-overload. It's all very concise.
Hi, great video!
Another question:
How do you organise your new spec videos? Does your playlist contain all of the new spec material on the perioidic table? Thanks!
AnimeOracle yep
He smiled at the end!!
he does that everytime
I literally got moved to the higher tier this year and my god is this content so easy!
yup now do it for three sciences with 9 topics with 0ver 20 formulas to memorise D:
MY GUY CAME THRU TWO HOURS BEFORE MY EXAM
how did it go?
Love these tutorials and the teacher! I'm doing Btec level 3 and was stuck on Avogadro constant but not anymore!
THANK YOU THANK YOU THANK YOU THANK YOU
The video has helped me understand the topic - thanks vey much :)
Thanks for the comment. I'm glad that the videos are helping.
wow i have been grinding these for my exams in 4 weeks. great videos
This topic makes me want to have picked double science , like year 9 me thought there wasnt much difference until we started homeostasis and quantitave chem in yr 10 like i swear only like the first video in this topic's playlist is for combined science, maaann they get it easy.
Yeah ikr 💜
ikr!!! Like I'm so lost rn. this is by far the most confusing topic in the whole of science I've come across so far TwT
Thank you , this really helped me understand the meaning on moles and how they’re important
3:24 why is 10 now to the power of 24 instead of 23?
Edit: now I understand lmao, I think it’s became now there are 3 digits instead of 2 after decimal point
You said "one mole of 'X' contains 4 moles of atoms. How can there be more moles of atoms if there's only one mole of 'X'? Please explain visually. Is it like having one bowl, then lots of small bowls within that bowl?
Yes that's correct. For example, the chlorine molecule Cl2 has two atoms of chlorine. So if I have one mole of chlorine molecules, then I have two moles of chlorine atoms.
Hi sir! You probably won't see this in time however I am really struggling with this concept. I have read all of the analogies for example dog legs etc however I can't understand how if there is one mole of a molecule there can be more moles of atoms within that molecule? If there is one mole of a dog, and the dog has 4 legs, how can the moles of dog legs surpass the total moles of dogs? I understand it to a degree and would probably be able to apply it but without the complete understanding, my brain doesn't want to accept it! Thank you for making these videos, they are a life saver! My teachers and all of my classmates love you!
A mole is simply a number (it's called Avogadro's constant). Imagine that "a mole" was simply the number "1". If I have 1 dog, I have 1 x 4 dog legs.
If I have 1 mole of dogs, I have 1 x 4 moles of dog legs. It really is as simple as that. A mole is just a number, just like 1 or 50 or pi.
is this for aqa science because i have not been taught this and it isnt in my aqa triple science CGP book? would i still need to learn this.
This is on the spec in a general sense. There is no specific reference to it but if you can't do it, then you'll struggle with many other areas of the chemistry specification.
it goes under the subsection of quantitative chemistry i took my GCSE test today and this was very helpful
Not good enough you should know this....
Do i have to know this if i'm doing higher combined science GCSE?
Yes if you're doing the Higher Tier.
The only complaint on this video is you did not specify to make the answer 10x smaller. E.g. 2 x 6.02 x10^23 = 12.04 x10^23 and then you make it 10 times smaller so its 1.204 x10^24
Thank u I wasn’t paying attention in class 😀
night before exam, please save me
So does each element in a compound have 6.02x10^23 of atoms and a compound itself have 6.02x10^23 of molecules within it?
In my own worksheet, it says 'Calculate the number of particles in 3 mol of sulfur dioxide' and apparently all you need to do is multiply Avogadro's constant by 3 to get the answer. But in your video when you're calculating the number of particles in a substance, you consider the number of atoms the given substance has, then multiply it by Avogadro's constant, which is unlike what my worksheet says. Why's that?
i love your style
Gcse tomorrow 🤞
this is the only thing in chemistry that i dont get
U know what I’m in year 10, it’s currently lockdown, it’s 2021, I’m doing foundation, I’ve never been able to much science at school because I’m so bad at it but I acc understand this
Why does the number of atoms answer change from Avogadro constant of 10 to power of 23 to 10 to power of 24 please?
same question dude
Its because of standard form, in standard form the subject number has to be between 1-10 e.g. 6.7 X 10²⁹, 6.7 is between 1-10. So as an example 12.04 X 10²³ goes against the standard form rule as 12.04 is not between 1-10, so we make it to 1.204 X 10²⁴ as this has the same answer as 12.04 X 10²³ but follows the rules of standard form, you should've learnt this in maths by now
Sir could you answer this question. For example, you said that 1 molecule of Calcium hydroxide contains contains 5 atoms and then you said 1 mole of calcium hydroxide molecules contains 5 moles of atoms. I don't understand what you meant here. Could you explain this to me in a more simpler way?
One mole is just a very large number (6 x 10^23). If one molecule contains five atoms, then one mole of those molecules will contain 5 x one mole of atoms. I'll give you another example. A dog has four legs. If you have a mole of dogs, then you have four moles of legs. Does that help?
@@Freesciencelessons I really don't get it I'm stressed for mocks
Do we only need to know the Avogadro constant to 6.02 x 10^23? Usually it is used as 6.022 so would we get marked down for using either number?
In the books its only 6.02x10^23
I've only seen it as 6.02x10^23. I'd say use that, instead of risking it with 6.022. Better safe than sorry
Big fan here sir Big fan From Pakistan🤗
this guy is a legend on god bro
nice video sir keep up the good work!!
You would be great at teaching geography.
thank you! you are way better at explaining this than my teacher hahahahaha
Sir, is this avogrados constant given in the exam?
why does he remind me of sheldon cooper from big bang theory
i never understood this and i have chemistry paper 1 on Friday. i think I get it now. 2 years of confusion and I just needed to watch freesciencelessons. honestly I love this man with every atom of my being, however many moles and avocados that may be. thanks shaun, I think you've saved my entire future lol :)
Huh?
I am doing AQA Chem Higher and Biology and chemistry higher
So which book is appropriate for me, triple or combined hugher
Are you doing separate sciences (Triple)? If you aren't sure, your teacher will be able to tell you.
Thanks as always.
I understand it all except the very last part. How does 6.02 x 10 to the power of 23 x 3 = 1.8 x 10 to the power of 24???
Try it on a calculator if you have one. HCl acid is a molecule with two atoms only: H and Cl. Two atoms in the molecule, means 2 moles of atoms.
So, HCl is equivalent to two moles of atom, ie: two times Avogadro's number (as a mole is equivalent to it)
Type "Two times Avogadro's number" on your Calculator:
> 2 x (6.02 x 10^24)
The answer your calculator would give is 1.204 x 10^24
God bless you sir. Seriously.
My exams today and ive been binge watching him and IM SOO TIREEEDDD
thanks so much!
So we need to remember the exact number for moles?????
Could someone explain how does one molecule contain 3 atoms but one mole contain 3 molecules ?
Hi. If a molecule has three atoms (eg H2O) and I have 1 mole of that molecule, then I have 3 moles of atoms (because each molecule has 3 atoms).
love this guy
Good video helped me lot
Video 41 of liking and commenting on all videos
Why is it 10^24 from 10^23 in the last one
In standard form, It must always be a number between 1 and 10 being multiplied by X. It would be 12.04x 10^23 but because that is not inbetween 1 and 10, we multiply X by 10 and divide 12.04 by 10 making it 1.204x10^24.
That is for question before last but it applies for both.
you life saver
thanks now i understand.
Chemistry tomorrow last minute revision lol
what do u do if ur asked to work out more than 1 mole?
Why for sodium oxide is it 1.806, should it not be 18.06?
no because when using standard form is should be between 1-10
You’re a very cool guy
you the man
lana del rey stan ;)
how does 5 atoms mean 5 moles?
Thank u
I like this
Is this for combined
Yes
@@jessicashadare6549 thx
Damn this helped
exam in two hours 💪
edexcel or AQA?
AQA
Both. This is a key part of chemistry.
I don’t understand it’s so hard
ily
Is this needed for combined?
Charlie English (Edexcel) If you’re doing higher
loml
Hahahaha 30 minutes to the exam
L