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v=0,5dm3=500cm3
d=0,6g/cm3
m=v*d
m=500*0,6
m = 300g
mr=300g
Cp=10%
ms=Cp*mr/100%
ms=10*300/100
ms = 30g kwasu
mr= 500cm^3*0,6g/c,^3=300g
Cp= 10%
ms= 10%*300g/100%=30g
odp.: 0,5 litrowa butelka 10% octu zawiera 30g kwasu octowego