The Mole and the Avogadro's Constant | A-level Chemistry | OCR, AQA, Edexcel

The Mole and the Avogadro Constant in a Snap!

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The key points covered in this video include:
1. What is the Mole?
2. The Mole
3. Molar Mass
4. Equations

What is the Mole?

Difficult to count the number of atoms accurately. Tiny size! In order to quantify the amount of a substance scientists use a measure called the mole. A mole is: The amount od a substance that contains the same number of atoms or particles as 12g of carbon-12.

The Mole

The value of the mole is: 6.02 x 10^23. Also known as Avogadro’s Constant. Huge number!

Molar Mass

Mass of one mole of a substance. Takes the same value as Atomic/Molecular/Formula Mass. Units: g mol^-1.

Equations

n - Number of moles. Units: mol. m - Mass. Units: g. M - Molar Mass. Units: g mol^-1.

[mohammad]

I love all ur tutorials, they are all so conspicuous and to the point.

[justsomeone]

thank you so much! just started A Level chem and this is quite helpful!!

[ray]

4:39 my maths is probably wrong but I'm sure 0.0016 is 16x10^-3 so answer is D

[Silvia-ervw]

4:40 wait this doesn’t make sense. i thought standard form was >1 and <10 how come the integer is 16?

[shahid]

Does anyone know, how much content this playlist has in terms of as and a level. So like do all 48 videos of this playlist cover only AS level Chem, or is it As and a level?

[nadineedmonds]

These videos can be very helpful however I feel you could really go more in-depth about what topic your speaking about. I’m just getting used to science and you say things about a topic expecting us to know what it is without fully explaining 🤷🏽‍♀️

[kxwtquz]

4:38 What's the difference between letter A and letter D? How would you know if it's 10^-3 or 10^4??

[kentheengineer]

But what are we counting that has to do with the substance where only saying that this refers to something that is coincidently equal to a specific measurement of atoms of a sample of another substance but people mistakenly assume that this term is generally applied to anything as if it's just a tern to represent a number of anything but that's where they be wrong because that was not the original intended use of the Mole aka avagadros number

[shabnumrashid]

Awsome video keep it up your videos are really helpful

[kentheengineer]

The Mole aka avagadros number is where Chemist are Making a comparison of what has already been measured to something that equals the same number of? with no references as to what is being counted? Why no citations of how or for what the Mol concept was originally used to do?

[bubalusbest]

Thank you so much this is very helpful. Now I understand it 😂.