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Avogadro constant
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Avogadro constant
In
chemistry
and
physics
, the
Avogadro constant
is the number of
constituent particle
s, usually
atoms
or
molecules
, that are contained in the
amount of substance
given by one
mole
. Thus, it is the proportionality factor that relates the
mass
of a sample of a compound to the
molar mass
of that compound. Avogadro's constant, often designated with the symbol
N
A
or
L
, has the value in the
International System of Units
(SI).
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