Answer:
The answer to your question is 8.46 g of Na₂SO₄
Explanation:
Data
mass of Na₂CO₃ = ?
volume = 21 ml
percent by mass = 36%
density = 1.12 g/ml
Process
1.- Calculate the mass of the solution
density = mass / volume
solve for mass
mass = density x volume
mass = 1.12 x 21
mass = 23.52 g
2.- Calculate the mass of Na₂CO₃
Percent by mass = (mass of Na₂SO₄ / mass of solution) x 100
Solve for mass of Na₂SO₄
mass of Na₂SO₄ = Percent by mass x mass of solution/100
mass of Na₂SO₄ = 36 x 23.52/100
mass of Na₂SO₄ = 8.46 g
