9. Calculate the percentage composition of silver sulfate, Ag2SO4.

69% Ag, 10.5% S, 20.5% O.

Explanation:

Ag₂SO₄ → Molar mass = 311.8 g/mol

2 mol of Ag → 107.87g/m. 2m = 215.74 g

1 mol of S → 32.06g/m. 1m = 32.06 g

4 mol of O → 16g/m. 4m = 64 g

Percentage composition will be:

(Mass of Ag / Total mass). 100

(215.74 g / 311.8 g). 100 = 69 %

(Mass of S / Total mass). 100

(32.06 g / 311.8 g).100 = 10.5%

(Mass of O / Total mass). 100

(64 g / 311.8 g). 100 = 20.5 %