what is the molecular formula for CH3 if it's molar mass is 62g/mol?

Answer 1

It will be of the form C_nH_3n.

12 x n + 3 x n x 1 = 62 (atomic mass of each atom times the number of atoms, n, in molecule = 62)

Solving for n, n = 62 / 15 = 4.1 ≈ 4.

The molecular formula is C₄H₁₂