Question

1.25 x 10^25 atoms of magnesium = ? moles of magnesium

Answer 1

21 moles of Magnesium

Explanation:
Moles of Mg= 1.25x10^25 atoms of Mg /6.02x10^23 atoms

6.02x10^23= Avogadro’s number or A

=20.7641196 moles of Magnesium or Mg
=21 moles of Magnesium or Mg