mass percent of the solution = 16.64%
Explanation:
We calculate the mass percent of a solution using the following formula:
mass percent = (mass of the solute / mass of the solution) × 100
mass of the solute = 68.1 g of NaOH
mass of the solution = mass of the solute + mass of water (H₂O)
mass of the solution = 68.1 + 341 = 409.1 g
mass percent = (68.1 / 409.1) × 100
mass percent = 16.64%
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