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Cp=ms*100%/mr / * mr
Cp*mr=ms*100% / :100%
Cp*mr/100%=ms
Obliczamy mase substancji saletry w roztworze 20%
ms=20%*300g/100%
ms=6000/100
ms=60g
Teraz dodajemy mase wody do masy roztworu saletry
300g+300g=600g
Obliczamy stezenie nowego roztworu
Cp=ms*100%/mr
Cp=60g*100%/600g
Cp=6000/600
Cp=10%