Calculate the formula unit mass of the following compounds
Formula unit mass: The formula unit mass of a substance is the sum of the atomic masses of all atoms in a formula unit of a compound. The term ‘formula unit’ is used for those substances which are made up of ions.
Formula unit mass of ZnO = Atomic mass of zinc + atomic mass of oxygen
= 65 + 16 = 81u
Formula unit mass of Na2O = 2X 23 +16 =46 + 16 =62u
Formula unit mass of K2CO3 = 2X39 + 12 + 2X16 = 78 + 12 + 32 = 122 u