(1): Calculate the mass of the solute (NaCl).
Assuming we have 100 g of solution
mass NaCl = 3.5 g
(2): MM of NaCl is 58.44 g/mol
moles NaCl = 0.0599 mol
Assuming that seawater is a 3.50 mass % aqueous solution of NaCl, what is the molality of seawater?
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