Răspuns :
md=40 g sare
mH₂O=760 g
___________
ms=md+mH₂O
ms=800 g solutie
c=md·100/ms
c=40*100/800
c=5 %
mH₂O=760 g
___________
ms=md+mH₂O
ms=800 g solutie
c=md·100/ms
c=40*100/800
c=5 %