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Ce concetratie procentuala are solutia rezultata prin adaugarea  a 800 g apa peste 3,2 kg solutie de concetratie 10%?

Răspuns :


c=100md/ms
md=c*ms/100

md=10*3200/100=320g

cf=100md/msf

msf=msi+mH2O=3200+800=4000g

cf=32000/4000=8%