Paper 1 - Chemical formulae, equations and calculations Flashcards
1
Q
How do you calculate relative formula masses (Mr) from relative atomic masses (Ar)?
A
Add up the atomic masses of each atom
2
Q
What is a mole?
A
The unit for the amount of a substance
3
Q
What is the equation for n (number of moles)?
A
Mass in g / Mr
4
Q
What is the equation for Mass in g?
A
n x Mr
5
Q
What is the equation for Mr?
A
Mass in g / n
6
Q
What is the equation for percentage yield?
A
actual yield / theoretical yield x 100
