Calculate the mass percent (m/m) for the solute in each of the following solutions: Express the answer using 2 sig figures.
Part A: 85g of NaOH in 325g of NaOH solution.
Part B: 2.0g of KOH and 25.0g of H2O
Part C: 49.5g of Na2CO3 in 220.0g of Na2CO3