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d(roztworu)=1,5g/cm3 = 1500g/dm3
ms(substancji)= 20g
Cp= 6%
6mr=2000 / :6
mr=333,33 g
a więc :
mr=dr * vr
vr =
czyli:
vr=333,33 : 1500 = 0,22 dm3