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40+20=60-tyle jest
Cp=ms/mr*100%
Cp=60/200*100%
Cp=30%
Odp:Stężenie procentowe danego roztworu wynosi 30%
100g-20gsoli
x=200g*20g/100g=40gsoli
200-40=160
160-20=140
40+20=60
140+60=200
200g-60gsoli
100g-x
x=100*60/200=30
Roztwór jest teraz 30%