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Cp=32%
d=1,2 g/cm3
Vwody=0,5dm3=500cm3=500g
Cp=?
Cp=ms/mr *100%
V=m/d-->m=V*d--->m=700*1,2=840g-masa roztworu
32%=ms/840 *100%
ms=268,8g
nowe stężenie
Cp=268,8/840+500 *100%
Cp=20,05%