Relative Molecular and Formula Mass Flashcards
1
Q
Define relative molecular mass
A
The mass of a molecule relative to one twelfth the mass of an atom of carbon-12
2
Q
What is Mr used for?
A
Simple covalent molecules and diatomic molecules
3
Q
What are the Mr units?
A
Grams per mole
4
Q
How is Mr calculated?
A
It is the sum of the Ar values of the elements in the molecule
5
Q
What is the relative formula mass?
A
The mass of the formula, relative to one twelfth the mass of an atom of carbon-12
6
Q
What is RFM used for?
A
Giant ionic compounds (salts)
