Question

Calculate the mass percent of different elements present im sodium sulphate

Answer 1

The molecular formula of sodium sulphate is Na2SO4.

Molar mass of sodium sulphate is = [(2 × 23) + (32) + 4 (16)]

= 142 g

Mass percent of an element = Mass of that element in the compound / Molar mass of compound x 100

Lert us calculate the Mass percent of sodium

Mass percent of sodium = 46\142 x100 = 32.4%

Mass percent of sulphur

= 32/142x100

=22.6%

Mass percent of oxygen

= 64/142x100

= 45%

Answer 2

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