👤

se dizolva 30 grame sare in 70 grame apa.calculati concentratia procentuala solutiei

Răspuns :

md=30g                                              

m apa=70g

c=?    c=mdx100/m solutiei=30x100/msolutie

m solutie=md+mapa=30+70 =100 rezulta c=30x100/100=30%