Calculate the formula masses of following compounds : (i) Sodium oxide, `Na_(2)O` (ii) Aluminiu

Calculate the formula masses of following compounds : (i) Sodium oxide, `Na_(2)O` (ii) Aluminium oxide, `Al_(2)O_(3)` (Given : Atomic masses : `Na = 23 u , O = 16 u , Al = 27 u`)

Aluminiu