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Amedeo Avogadro
An Italian scientist who made significant contributions to our understanding of gases and molecular theory.
Avogadro's Number
6.02 x 10^23
particles
can be atoms, molecules, ions, or formula units.
mole
serves as a bridge between the mass of a given substance and the number of particles contained in that substance.
molar mass
the mass (in grams) of one mole of that substance.
percent composition
gives the percentages that each element of that substance contributes to its total mass.
empirical formula
indicates the simplest whole-number mole ratio between the elements of that substance.
molecular formula
indicates the number of moles of each element that would be found in one mole of that substance.
Note 
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