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Cp1= 40%
Cp1= ms/mr1 *100%
Cp1*mr1= ms* 100%
ms= Cp1*mr1/100%= 100g
Cp2= ms/ mr2 *100%
mr2= ms* 100%/ Cp2
mr2= 555g
mr2- mr1= 305g- tyle wody należy dodać.
2.
ms= 4g M= 127 g/mol
n= m/M= 0,03mola
Vr= 160cm3= 0,16dm3
Cm= n/v= 0,188 mol/dm3
d= 0,78g/cm3= 780g/dm3
Cm= Cp*d/ M*100%
Cm*M*100%= Cp*d
Cp= Cm*M*100%/d= 3%
Pozdrawiam.