Topic 4- Chemical Calculations Flashcards
1
Q
Define a mole.
A
One mole is the amount of substance which contains the same number of particles as there are atoms in 12.00 of 12C.
2
Q
What is Ar?
A
The relative atomic mass of an element.
3
Q
What is Mr?
A
Mr is the total relative atomic masses in a molecule.
4
Q
What is the basic calculation when calculating the number of moles?
A
Number of moles = Mass (in g) / Ar or Mr
