Define relative molecular mass, \( M_r \), as the sum of the relative atomic masses. Relative formula mass, \( M_r \), will be used for ionic compounds

Use the relationship amount of substance (mol) = mass (g) / molar mass (g/mol) to calculate: (a) amount of substance (b) mass (c) molar mass (d) relative atomic mass or relative molecular/formula mass (e) number of particles, using the value of the Avogadro constant