Calculate the formula unit mass of ZnO , Na2O , K2CO3 , given atomic masses of Zn = 65 u , Na =23 u , K = 39 u , C = 12 u , and O = 16 u .
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- The formula unit mass of
(i) ZnO = 65 u + 16 u = 81 u
(ii) Na2O = (23 u x 2) + 16 u = 46 u + 16 u = 62 u
(iii) K2C03 = (39 u x 2) + 12 u + 16 u x 3
= 78 u + 12 u + 48 u = 138 u
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