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Mr
sum of Ar of all elements in compound
Moles (mol)
specific number of particles called Avagrado's constant
Moles (formulae)
Mass/Mr
% mass of an element in a compound
(Ar x no. of atoms of element in formulae x 100)/Mr
Molar gas volume (dm3)
moles x 24
% yield
(actual yield/theoretical yield) x 100
% purity
(mass of pure product/mass of inpure product) x 100
Emperical formulae (ratio)
simplify ratio of moles of elements in formulae
Concentration (mol/dm3)
No. of moles of solute/volume of solution