What is Density?
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Density (
r
)
=
Mass (M) per unit Volume (V)
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r
= M/V
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r
= Greek letter
Ò
rho
Ó
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Typical Units:
kg/m
3
, gm/cm
3
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Mass
=
¥
# molecules (mole)
«
molecular mass
(gm/mole)
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Avogadro number (6.023x10
23
molecules/mole)