Răspuns:
c1=10%
ms1=400g
se adauga md soda
c2=20%
c2= md2x100/ms2 unde md2= md1+md
ms2=ms1+md
md1=c1xms1/100= 10x400/100g=40g
c2= (40+md)x1oo/(400+md)=20
20(400+md)=100(40+md)
8000+20md=4000+100md
80md=4000----> md=50g soda
Explicație:
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Răspuns:
c1=10%
ms1=400g
se adauga md soda
c2=20%
c2= md2x100/ms2 unde md2= md1+md
ms2=ms1+md
md1=c1xms1/100= 10x400/100g=40g
c2= (40+md)x1oo/(400+md)=20
20(400+md)=100(40+md)
8000+20md=4000+100md
80md=4000----> md=50g soda
Explicație: