This category of measurement units is defined by the "amount of substance" type, which is an SI base quantity.
The SI base unit for amount of substance is the mole.
The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is "mol."
grams FeAs to moles
grams CoWO4 to moles
grams PuH2 to moles
grams FeI3 to moles
grams Terbium to moles
grams Scandium(III) Hydride to moles
grams Thulium(II) Iodide to moles
grams Tin(II) Fluoride to moles
grams Sodium Vanadate to moles
molar mass of PtTe
molar mass of C12H22O11
molar mass of MgO
molar mass of TeO2
molar mass of Nobelium
molar mass of Cadmium Chromate
molar mass of Beryllium Fluoride
molar mass of Diboron Trisulfide
molar mass of Hydrogen Sulfide