WHAT is a mole?
Scroll to see replies
Original post by FailedMyMocks
Maths W/Finance or Computer Sci..
cool
Original post by p29
cool
Anyway, Stay on top of your chemistry. It was the hardest A level I did and I even took Further Maths...
Good Luck!
Original post by FailedMyMocks
Anyway, Stay on top of your chemistry. It was the hardest A level I did and I even took Further Maths...
Good Luck!
Good Luck!
im taking further maths aswell, fml
Original post by p29
im taking further maths aswell, fml
Woo!
•
This is all about moles, molar mass and mass of element. Something like that lool, just revise that!
Original post by 1010marina
Kind of, but backwards:
All the mass numbers on the periodic table are in relation to carbon 12. They're all relative numbers, which means, they're unitless - if carbon 12 weighs 12 x (x could be grams, kilograms, etc.) then your hydrogen atom will weigh only 1 x. It's a relationship.
Avogadros number makes calculations using this fact easier. We measure in grams so we need a way of finding out how much 'stuff' is in a gram.
All the mass numbers on the periodic table are in relation to carbon 12. They're all relative numbers, which means, they're unitless - if carbon 12 weighs 12 x (x could be grams, kilograms, etc.) then your hydrogen atom will weigh only 1 x. It's a relationship.
Avogadros number makes calculations using this fact easier. We measure in grams so we need a way of finding out how much 'stuff' is in a gram.
By relation do you mean ratios?
A mole is literally a unit of measurement, like a kilogram or a metre.
One mole of any element compound or substance always has a specific number of those particles. That specific number is a constant known as avogadros constant. 6.022 x 10 23
A mole can have a different mass dependent on the element. Since relative atomic mass is the average weighted mass of a substance relative to 1/12 of the mass of carbon-12, a mole of carbon 12 weighs exactly 12 g and so we can deduce that the mass of a mole of a substance is round about the same number of grams as its relative molecular mass.
One mole of any element compound or substance always has a specific number of those particles. That specific number is a constant known as avogadros constant. 6.022 x 10 23
A mole can have a different mass dependent on the element. Since relative atomic mass is the average weighted mass of a substance relative to 1/12 of the mass of carbon-12, a mole of carbon 12 weighs exactly 12 g and so we can deduce that the mass of a mole of a substance is round about the same number of grams as its relative molecular mass.
Quick Reply
Related discussions
- Can someone please provide me a solution to this
- Amount of substance q help
- Chemistry moles help
- A-level Transition metal mc question
- Mole Calculations.
- Titrations
- Equilibrium
- a level chem help
- Kc Titration Question
- Calculate the oxidation state of the vanadium ion?! URGENT
- Chemistry Moles
- AS chemistry
- Chemistry Question Help please
- chemistry help
- Mole calculation
- chem help
- chemistry a level ocr question
- hard titration alevel chem Q!
- Chemistry - yields question
- Chem alevel help
Latest
Trending
Last reply 6 days ago
Im confused about this chemistry question, why does it form these productsTrending
Last reply 6 days ago
Im confused about this chemistry question, why does it form these products
