Răspunsuri

2014-10-25T17:18:43+03:00
 m_{s}  m_{d}  m_{apa}
 m_{s} = 100g+25g = 125g solutie
c=  \frac{m_{d}  x10 0}{ m_{s} }  \frac{25 x 100}{125} = \frac{2500}{125}  =20 %
2014-10-25T22:38:26+03:00
 + 
 = 100g+25g = 125g solutie
c=  =  =20 %

Eu cel putin asa stiu de la bunicul meu ce a luat facultatea de chimie,anu nustiu daca asa a zis