Question

Calculate the molecular masses of the following compounds  :

Ethene, C₂H₄ 

(Atomic masses : C = 12 u ; H = 1 u)

Answer 1

Given:

Atomic mass of C = 12 u

Atomic mass of H = 1 u

Therefore, molecular mass of C₂H₄ (ethylene) can be calculated as follows:

(2 × 12) + (4 × 1) = 28

Hence, molecular mass of ethylene is 28 u.