What mass of dinitrogen pentoxide is required to produce 100.00 g of nitrogen dioxide? The molar mass of dinitrogen pentoxide is 108.01 g/mol, and the molar mass of nitrogen dioxide is 46.0055 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.