Question

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

Answer 1

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: