Question

Distinguish between molecular mass and molar mass.

Answer 1

Molecular mass is the computed mass from a molecular formula. Always remember that molecular formula shows the actual number of atoms in a substance. It is different from empirical formula as it only shows the ratio between atoms in a substance.
Molar mass is the mass of a substance depending on how many moles of substance is taken into consideration.

Answer 2

 Molecular mass is the computed mass from a molecular formula. Always remember that molecular formula shows the actual number of atoms in a substance. It is different from empirical formula as it only shows the ratio between atoms in a substance. 
Ex. 
[molecular formula] H2O2: 34 g 
[empirical formula] HO: 17 g 

Molar mass is the mass of a substance depending on how many moles of substance is taken into consideration. 
Ex. 
A mole of H2O: 18 g 
Two moles of H2O: 32 g 
Three moles of H2O: 44 g 
and so on.