Question

Which has more number of atoms, 100 grams of sodium or 100 grams of iron (given, atomic mass of Na = 23 u, Fe = 56 u)?

Answer 1

Atomic mass of Na = 23 u (Given)

Then, gram atomic mass of Na = 23 g

Now, 23 g of Na contains = number of atoms

Thus, 100 g of Na contains number of atoms

= number of atoms

Again, atomic mass of Fe = 56 u(Given)

Then, gram atomic mass of Fe = 56 g

Now, 56 g of Fe contains = number of atoms

Thus, 100 g of Fe contains number of atoms

number of atoms

Therefore, 100 grams of sodium contain more number of atoms than 100 grams of iron.