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mr = 400 g
ms = ?
MH2O = ?
Obliczam mase substancji - ms
Cp = ms x 100% / mr
ms = Cp x mr / 100%
ms = 40 % x 500g/100%
ms = 200 g
Obliczam mase wody
mr = ms + mH2O
mH2O = mr - ms
mH2O = 500 g - 200g = 300 g