fine formula unit . calculate the formula of mass of Na2 Co3
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Answer:
The formula unit mass of a substance is the sum of the atomic masses of all the atoms in the formula unit of an ionic compound. Therefore formula unit mass of Na2CO3 = 2Na + 1C + 3O = 2 × 23 + 1 × 12 + 3 × 16 = 46 + 12 + 48 = 106 u.
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Explanation:
sodium carbonate contains 2 atoms Na, 1 atom of C and 3 atoms of O. So the molecular weight will be
Na= 2 x 23 = 46. C= 1 x 12= 24. O= 3 x 16 =48
When we add up the total values i.e, 46 + 12 + 48 = 106u
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