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Ce concentratie procentuala va avea solutia obtinuta prin dizolvarea a 80g detergent in 500 g apa?
E URGENT!!DAU COROANA!!


Răspuns :

c= mdx100/ms,    unde ms= md+m,apa
md=80g
ms= 80+500=> 580g
c= 80x100/580=....................calculeaza !!
c = md/ms * 100
md = 80 g
ms = 80+500 = 580 g
c = 80/580 * 100 = 13,793%