Calculate the number of different atoms in 0.2 mol ethane (C2H4)

Explanation:

C have 2 molecules

So No of atoms in C = 0.2 × 2 × 6.023 × 10²³

= 2.4092 × 10²³ Atoms

H have 4 molecules

So no of atoms in H = 0.2 × 4 × 6.023 × 10²³

= 4.8184 × 10²³