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Am o intrebare: cum se afla cf din formula: md1=10g c1=2% md2=20g c2=2% imi trebuie c final


Răspuns :

este 2%
ms1=md1*100/c1=10*100/2=500g
ms2=md2*100/c2=20*100/2=1000g
ms=ms1+ms2=1000+500=1500g
md=md1+md2=10+20=30g
c=30/1500*100=2%