Question

which has lesser number of atoms and moles , 50g of iron or 50g of sodium ? ( at.mass of Fe =56u ,Na=23u )​

Answer 1

Number of moles of iron = 50/56

Number of moles of sodium = 50/23

Clearly,the number of moles of sodium is greater than the number of moles of iron.

Now,the number of atoms= number of moles * Avagadro number (6* 10^23)

So,the species having more number of moles has the more number of atoms..Therefore,Sodium has more number of atoms than iron in the above question.