Determine the molecular formula of a compound with an empirical formula of NH2 and a formula mass of 32.06?

empirical formula = NH2
empirical unit mass = 1x14.01 + 2x1.008 = 16.03
molecular mass = 32.06
molecular mass / empirical unit mass = 32.06 / 16.03 = 2

that means there are 2 empirical units in every molecule so the molecular formula is N2H4

Let (NH₂)ₓ be the molecular formula.

The molar mass :
(14.01 + 1.01×2) x = 32.06
16.03x = 32.06
x = 2

Molecular formula = N₂H₄

NH2: NH2 is the molecular formula of a compound with an empirical formula of NH2 and the molecular mass of 32.06 , since NH2: NH2 contains 2 atoms of N each of atomic mass 14 g / atom and 2 atoms H , each of 1 gram / atom , thus total of atomic mass is 32 which forms a molecular mass of 32 g