Răspunsuri

2014-08-13T17:05:07+03:00
Md (masa dizolvat)=5g sare
ms (masa substanta)=5+11=16 g amestec
c (concentratie)=md*100/ms

c=5*100/16=500/16=31,25 %

1 1 1
2014-08-13T17:05:14+03:00
Md=5g
mapa=11g
c=?
c+md supra ms*100
ms=md+mapa
ms=5+11g=16g
c=5supra 16g*100=31,25%
1 5 1