Question

How many atoms of magnesium are in a 134 gram sample of magnesium?

Answer 1

No. of moles in 134g of Mg, n=134/24 =5.58 moles
No. of atoms = n* Avogadro number
                     = 5.58 X 6.022 X 10^23
                      =33.60 X 10^23 atoms