Question

concentratia unei solutii din 80g sare si 1920g apa va rog cu rezolvare​

Answer 1

 

$\displaystyle\bf\\Cantitatea~de~solutie = 1920~g~apa+80~g~sare=2000~g~solutie.\\\\Concentratia=\frac{80~sare}{2000~g~solutie}\times = 0,04=\boxed{\bf4\%}$