Question

Ce concentratie procentuala are solutia obtinita prin dizolvarea a 30g alcool in 120g apa?​

Answer 1

Răspuns:

Explicație:

md=30 g

mH2O=120 g

c=?

ms=md+mH2O=30 g+120 g=150g

c=md/ms*100=30/150*100=20 %

Answer 2

ms = md+mH2O

ms = 30+120

ms = 150g

c = ( md / md )×100

c = (30/150)×100

c = 3000/150

c = 20%