Amount of substance Flashcards
1
Q
Why is the mole used
A
This is because atoms are too small and cannot be weighed therefore mole concept is used to determine how many there are and there mass
2
Q
What did Avogadro work out
A
He worked out the number of particles in a mol of substance ie. 6.022×10²³ paricles
3
Q
How to calculate moles using mass and Mr
A
Moles=mass/Mr
4
Q
How to calculate number of particles
A
Number of particles=moles×avogadros number
