Răspunsuri

2014-11-17T16:25:52+02:00
MH2O=30 ml
c=14%
Stii ca:
c=md/ms*100
iar ms=md+mH2O, deci
c=md/(md+mH2O)*100
c*(md+mH2O)=100*md
14*(md+30)=100*md
14*md+420=100*md
86*md=420
md=4.88
Am notat cu
Am notat cu md - masa zahar ; ms - masa solutie si c - concentratie