Moles of zn in 5.6*10^24 atoms of zn

1 mole of any substance (atoms or molecules)=6.022 x 10²³ atoms or molecules.

In this case:
1 mole of Zn=6.022*10²³ atoms.

Then:

1 mole of Zn6.022*10²³ atoms
x5.6*10²⁴ atoms

x=(1 mole of Zn * 5.6*10²⁴ atoms)/6.022*10²³ atoms=9.0032... moles≈
≈9 moles

we have 9 moles in 5.6*10²⁴ atoms of Zn.