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Question

Calculate the mass percent of different elements present in sodium sulphate (Na2SO4).

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Solution

The molecular formula of sodium sulphate is.

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

= 142.066 g

Mass percent of an element

∴ Mass percent of sodium:

Mass percent of sulphur:

Mass percent of oxygen:


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