Question: 30. A 3.68 M aqueous solution in Na2S2O3 (Mm = 158 g/mol) has d = 1.27 g/mL: a. Calculate the % by mass of Na2S2O3.

30. A 3.68 M aqueous solution in Na2S2O3 (Mm = 158 g/mol) has d = 1.27 g/mL:

a. Calculate the % by mass of Na2S2O3.

b. Calculate the molality of the solution.

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