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mr=250[g];
Cp=6%.
Wzór:
ms=(Cp*mr)/100%;
ms=(6%*250[g])/100%=1500/100=15[g];
3%=(15*100%)/(250+mw);
3(250+mw)=1500;
750+3mw=1500;
3mw=750 II 3;
mw=250[g]H2O.
Odp.Należy dolać mw=250[g] H2O.