If you transferred 2.00 mL of 5.49 x 10^-2 M Fe(NO3)3 solution into a 250.00 mL volumetric flask and diluted to the mark with water, what concentration of Fe3+ would this dilute solution have?

Answer 1

You're diluting from 2.00 mL to 250 mL so
0.0549 M x (2.00 mL/250 m L) = ?