The number of atoms =

⇒ N = × N₀

The number of molecules in 100g of N₂:

Atomic mass of nitrogen (N) = 14

Molar mass of N₂ molecules = 14x2 = 28g

Number of atoms in N₂ = 1 + 1 = 2

= 2 X = 43.01X 10²³

The number of molecules in 100g of NH₃:

Molar mass of NH₃ molecules = 14+3X1 = 17g

number of atoms in NH₃ = 1 + 3 = 4

= 4 X

Therefore, NH₃ would have more atoms.