Show how to work out the molar mass of Al2(SO3)3 294.15 g Al2(SO3)3

fe 55.85 g/mol and h2o 18.02 g/mol.

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.