Question

Ce concentratie procentuala are solutia obtinuta prin dizolvarea a 18 grame zahar in 200 grame apa?

Answer 1

c=md/ms*100
c=18/200*100
c=18/2*1 (SE SIMPLIFICA ZEROURILE SI RAMANE 2 SI 1; se simplifica cu doi)
c=9%

Answer 2

c=$\frac{md}{ms}$ x 100
c=$\frac{18}{200}$ x 100 = 9 %