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<p>n expressed in <a href="page.php?w=mole_%28unit%29">mole</a>s, the particle number N can be found by the relation :,where N<sub>A</sub> is the <a href="page.php?w=Avogadro_constant">Avogadro constant</a>.</p>

<p><big>Particle number density</big></p>
<p>A related <a href="page.php?w=intensive_parameter">intensive system parameter</a> is the <b>particle <a href="page.php?w=number_density">number density</a></b> (or <a href="page.php?w=particle_number_concentration">particle number concentration</a>, PNC), a quantity of kind <a href="page.php?w=volumetric_number_density">volumetric number density</a></p><p>
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