Answer:
Mass fraction of Na = 0.3239
Mass fraction of S = 0.2254
Mass fraction of O = 0.4507
Explanation:
We are given the element as (Na2S04).
Atomic mass of Na = 23
Atomic mass of S = 32
Atomic mass of O = 16
Thus;
Molar mass of (Na2S04) = (23 × 2) + 32 + (16 × 4) = 142
Mass fraction of Na = (23 × 2)/142 = 0.3239
Mass fraction of S = 32/142 = 0.2254
Mass fraction of O = (16 × 4)/142 = 0.4507
