The gram molecular mass of a substance is called its:

The molar mass of ${\mathrm{Al}}_2({\mathrm{SO}}_4{)}_3$ is: 

$[\mathrm{Al}=27, \mathrm{S}=32, \mathrm{O}=16]$

The molecular mass of sugar [${\mathrm{C}}_{12} {\mathrm{H}}_{22}{\mathrm{O}}_{11}$ ] is:

$[\mathrm{C}=12, \mathrm{H}=1, \mathrm{O}=16]$

Unit formula mass of ammonium phosphate [$({\mathrm{NH}}_4{)}_3{\mathrm{PO}}_4$] is

$[\mathrm{N}=14, \mathrm{H}=1, \mathrm{P}=31, \mathrm{O}=16]$