MolesToMass

MolesToMass[comp,moles]
converts a molar amount of a chemical component to a mass.

MolesToMass[datatable]
convert the data in all columns of a DataTable from molar amounts to masses based on the component specified as column header.

MolesToMass[association]
convert the data in elements of an Association from molar amounts to masses based on the component specified as keys.