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peso soluc.
m (soluto) = 15 g de sal
m (solvente) = 150 g de agua
% p/p = ?
1. calcular el peso de la solución
peso solución = peso soluto + peso solvente
peso solución = 15 g + 150 g = 165 g de solución
2. calcular % p/p
% p/p = 15 g x 100 = 9,01 % p/p
165 g