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mr=60g
ms=Cp*mr/100%
ms=8*60/100
ms = 4,8g subst.
60g roztworu - 4,8g subst. = 55,2g wody
Cp= 8%
ms= 0,008 x 60g = 4,8g( masa stałej substancji)
mH2O= 60g- 4,8g= 55,2 g
VH2O= 1g/cm3 x 55,2g= 55,2 cm3( objętość wody)