Answer:
75 mol
Explanation:
The number of atoms in a mole of substance is 6.023X10²³ [Avagadro's number]
if the given sample of nickel contains 4.5X10²⁵ atoms it means the moles are
moles = [tex]\frac{numberofatoms}{Avagadro'snumber}[/tex]
moles = [tex]\frac{4.5X10^{25}}{6.023X^{23}}=74.71mol[/tex]
If we round of the given answer the number of moles = 75 moles
