Respuesta :
To solve this we use the equation,
Â
M1V1 = M2V2
Â
where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.
Â
.675 M x V1 = .25 M x 1.3 L
V1 = 0.48 L or 480 mL