md=masa dizolvata
m apa=masa apei
ms=masa solutiei
c=concentratia
In cazul nostru md=80 g (zaharul)
Stim ca ms= md+ m apa=80+240=320 g
c=[tex] \frac{md*100}{ms} = \frac{8000}{320} =25[/tex]
Deci , solutia are o concentratie de 25% .
Daca nu intelegi ceva , intreaba-ma :)
