Relative Formula Mass Flashcards
1
Q
what is relative formula mass?
A
relative formula mass (RFM) is the mass of a formula unit of a substance
2
Q
how is RFM calculated?
A
it is calculated by adding the relative atomic masses (RAMs) of the atoms or ions
3
Q
what is percentage by mass?
A
it shows the mass of a substance that comes from a particular element
4
Q
what is the formula to calculate percentage by mass, using RFM?
A
% ‘x’ = mass of ‘x’ / RFM x 100
