zad. 44 str. 106 ; D 1 gim . ćwiczenia .
Oblicz , ile gramów soli kuchennej i wody potrzeba do przygotowania 200 g 25-procentowego roztworu . ; *** ; D
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ms = 25%*200g
ms = 0,25*200g
ms = 50g
mw = 200g-50g
mw = 150g