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A chemist's counting unit representing 6.022 x 10^23 of anything, also known as ______ number.
The mass of one mole of a substance, expressed in units of ______ per mole (g/mol).
An analytical technique used to determine the exact masses and relative ______ of different isotopes of an element.
The ______ whole-number ratio of atoms in a compound.
The ______ number of atoms of each element in a molecule, which is a whole-number multiple of the empirical formula.