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# Calculate the mass percent of different elements present in sodium sulphate (Na2 SO4).

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The molecular formula of sodium sulphate is (Na2SO4). Molar mass = atomic mass of Na(23) + atomic mass of S(32.066) + atomic mass of O(16) Molar mass of (Na2SO4) = = 142.066 Mass percent of an element ∴ Mass percent of sodium: Mass percent of sulphur: Mass percent of oxygen:

The molecular formula of sodium sulphate is (Na2SO4).

Molar mass = atomic mass of Na(23) + atomic mass of S(32.066) + atomic mass of O(16)

Molar mass of (Na2SO4) = [(2 × 23.0) + (32.066) + 4 (16.00)] = 142.066

Mass percent of an element

∴ Mass percent of sodium:

Mass percent of sulphur:

Mass percent of oxygen:

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