# How many moles are in 5.75 * 10^24 atoms of Al?

Jan 16, 2016

To obtain the number of moles of a certain element given the number of atoms only, you have to divide it with Avogadro's number, $6.02 \cdot {10}^{23} m o {l}^{- 1}$.
mol Al = (5.75 * 10^24 Al atoms) * (( 1 mol) / (6.02 * 10^(23) Al atoms)
$m o l A l = 9.55 m o l$