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Calculati 30g sare de bucatarie 170g apa c=?



Răspuns :

md=30g
mapa=170g
ms=md+mapa=170+30=200g solutie(saramura)
200g solutie......30g sare
100g solutie........x g sare
200/100=30/x
x=100×30/200=1×30/2=15g sare
C=15%