0.7168 g of sample was dissolved to make 250.0 mL of solution X. A 5.00 of ophenanthroline solution and 20 drops of sodium citrate were mixed with 10.00 mL of solution X and the entire thing diluted to 100.0 mL to create solution Y. The absorbance of solution Y was 0.523 at 520 nm. What is the %Fe in the sample?

0.7168g of sample was dissolved to make 250.0mL of solution X. A 5.00 of ophenanthroline solution and 20 drops of sodium citrate were mixed with 10.00mL of solution X and the entire thing diluted to 100.0mL to create solution Y. The absorbance of solution Y was 0.523 at 520nm. What is the \%Fe in the sample