Answer:
9.55 mol of Al
Step-by-step explanation:
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 x 10^23 mol−1.
mol Al = (( 5.75 x 10^24 Al) atoms) ⋅ ((1 mol / 6.02 x 10^23 Al ) atoms)
mol Al= 9.55 mol
Hope this helped you out!