Answer:
20% by mass means 20 g of the NaOH is dissolved in 100 g of solution. If that is what you mean.
Step-by-step explanation: What is the meaning of 20% mass by volume solution?
20% mass by volume means 20 g of the NaOH is dissolved in 100 mL of the solution.
Depends on the concentration terms meaning and values also changes.
