Eggs, mass and mole calculations

Eggs, Mass and MolesEggs, Mass and MolesRAY 2010RAY 2010

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12 imagine you have lots imagine you have lots

of eggsof eggs

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12 imagine you have lots imagine you have lots

of eggsof eggs you want to know how you want to know how

many dozen you havemany dozen you have

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12 imagine you have lots imagine you have lots

of eggsof eggs you want to know how you want to know how

many dozen you havemany dozen you have if you know how much if you know how much

1 dozen weighs and 1 dozen weighs and how much the total how much the total weighs…weighs…

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12 imagine you have lots imagine you have lots

of eggsof eggs you want to know how you want to know how

many dozen you havemany dozen you have if you know how much if you know how much

1 dozen weighs and 1 dozen weighs and how much the total how much the total weighs…weighs…

Number = mass of sample of dozen mass of one dozen

Weighing eggsWeighing eggs

eggs sold in dozenseggs sold in dozens a dozen is 12a dozen is 12 imagine you have lots imagine you have lots

of eggsof eggs you want to know how you want to know how

many dozen you havemany dozen you have if you know how much if you know how much

1 dozen weighs and 1 dozen weighs and how much the total how much the total weighs…weighs…

Number = mass of sample of dozen mass of one dozen

number of

dozen

mass of 1 dozen

mass of sample

different types of eggs weigh different types of eggs weigh different amounts. eg:different amounts. eg:

1 dozen chicken eggs weigh 700g1 dozen chicken eggs weigh 700g 1 dozen duck eggs weigh 900g1 dozen duck eggs weigh 900g 1 dozen quail eggs weigh 250g1 dozen quail eggs weigh 250g 1 dozen ostrich eggs weigh 5000g1 dozen ostrich eggs weigh 5000g

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

the chemists the chemists ‘dozen’ is much ‘dozen’ is much biggerbigger

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

the chemists the chemists ‘dozen’ is much ‘dozen’ is much biggerbigger

it’s called a moleit’s called a mole

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

the chemists the chemists ‘dozen’ is much ‘dozen’ is much biggerbigger

it’s called a moleit’s called a mole we count atoms as we count atoms as

numbers of molesnumbers of moles

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

the chemists the chemists ‘dozen’ is much ‘dozen’ is much biggerbigger

it’s called a moleit’s called a mole we count atoms as we count atoms as

numbers of moles numbers of moles atoms are very tinyatoms are very tiny

Weighing atomsWeighing atoms

chemists weigh chemists weigh atomsatoms

the chemists ‘dozen’ the chemists ‘dozen’ is much biggeris much bigger

it’s called a moleit’s called a mole we count atoms as we count atoms as

numbers of molesnumbers of moles atoms are very tinyatoms are very tiny one mole is 6x10one mole is 6x102323

instead of 12 (dozen)instead of 12 (dozen)

6x1023

number of

dozen

mass of 1 dozen

mass of sample

eggs

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12)

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12) unit is mole (6 x unit is mole (6 x 10102323))

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12) weigh the sampleweigh the sample

unit is mole (6 x unit is mole (6 x 10102323))

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12) weigh the sampleweigh the sample

unit is mole (6 x unit is mole (6 x 10102323))

weigh the sampleweigh the sample

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12) weigh the sampleweigh the sample divide by the mass divide by the mass

of 1 dozenof 1 dozen

unit is mole (6 x unit is mole (6 x 10102323))

weigh the sampleweigh the sample

eggs atoms

number of

dozen

mass of 1 dozen

mass of sample

number of

moles

mass of 1 mole

mass of sample

unit is dozen (12)unit is dozen (12) weigh the sampleweigh the sample divide by the mass divide by the mass

of 1 dozenof 1 dozen

unit is mole (6 x unit is mole (6 x 10102323))

weigh the sampleweigh the sample divide by the mass divide by the mass

of 1 moleof 1 mole

eggs atoms

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

C12

6

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

C12

6

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

C12

6

the relative atomic mass is themass of one mole in grams

Where do we find the mass of 1 Where do we find the mass of 1 mole?mole?

C12

6

the relative atomic mass is themass of one mole in grams

1 mole of carbon atoms weighs 12g

number of

moles

mass of 1 mole

mass of sample