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mr=2kg=2000g
V=0,5dm3=500cm3
q=m/V /*V
m=q*V
q=1g/cm3
m=1g/cm3 * 500cm3= 500g
Cp= ms/mr *100% /*mr
Cp*mr = ms*100% / 100%
ms= (Cp*mr)/100%
ms= (10%*2000g) / 100% = 200g
Cp= (200g / [2000g+500g]) * 100% = 8%
Odp.Stężenie procentowe tego roztworu wynosi 8%.