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ms=10g
200-10=190- woda
190-75=115g
Cp=10/125 x 100%
Cp=8%
1000=100x /:100
x= 10 - ilość substancji
Cp = 10 / 200-75 * 100 %
Cp =10/125 * 100 %
Cp = 8 %
Myślę, że dobrze :))