Calculate the formula unit mass of 1) Na2o 2) CaCl2 atomic mass of Na=23u , oxygen = 16u , Ca = 40u , Cl = 35u
Formula unit mass of Na2O = 2 × Atomic mass of Na + Atomic mass of O
= 2 × 23 + 16
= 62 u
Formula unit mass of CaCl2 = 1 × Atomic mass of Ca + 2 × Atomic mass of Cl
= 1 × 40 + 2× 35
= 110 u
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