Relative Mass Ch1 / L3 Flashcards
1
Q
What is relative atomic mass, Ar
A
The weighted mean mass of an atom relative to 1/12 of the mass of a carbon-12 atom
1
Q
What is relative isotopic mass
A
The mass of an isotope relative to 1/12 of a carbon-12 atom
2
Q
How is relative atomic mass, Ar, calculated
A
Ar = sum of (Isotopic mass x Relative Abundance) / Total Abundance
3
Q
What is realtive molecular mass, Mr
A
Describes chemicals that have a fixed formula in terms of the number of atoms involved
4
Q
How is relative molecular mass, Mr, calculated
A
Mr = sum of ( atom x relative atomic mass)
5
Q
What is relative formula mass
A
Descbribes chemicals that use an empirical formula to represent them
