Răspuns:
Explicație:
ms1=230 g md1=c1*ms1/100=30*230/100=69g
c1=30%
ms2=400g md2=c2*ms2/100=60*400/100=240 g
c2=60% mdf=md1+md2=69g+240 g=309 g
cf =? cf=mdf/msf*100=69 g/309 g*100=22,33%
mH2O=85 g md=c1*ms1/100=30*300/100=90 g
ms1=300 g ms2=ms1+mH2O=300+85=385 g
c1=30%
cfinal=? cfinal=md/ms2*100=90 g/385g*100=23,87 %