Question

Which has more number of atoms? 

100g of N₂ or 100 g of NH₃

Answer 1

(i) 100 g of N₂ = 100 /28 moles 

Number of molecules = 100 28 × 6.022 ×10²³ 

Number of atoms = (2 ×100 / 28)× 6.022 ×10²³  = 43.01×10²³ 

(ii) 100 g of NH₃ = 100 /17 moles = 100 /17 × 6.022×10²³ molecules 

=100 /17 × 6.022 ×10²³ × 4 atoms 

= 141.69 ×10²³ 

NH₃ would have more atoms