A coordination compound of iron, Y, has the formula Na2[Fe(CN)x(NH3)y]\text{Na}_2[\text{Fe}(\text{CN})_x(\text{NH}_3)_y]Na2[Fe(CN)x(NH3)y] and contains CN−\text{CN}^-CN− and NH3\text{NH}_3NH3 ligands.
The percentage by mass of three of the elements in compound Y is shown below:
Use the following molar masses: Fe=55.8 g mol−1\text{Fe} = 55.8\text{ g mol}^{-1}Fe=55.8 g mol−1, C=12.0 g mol−1\text{C} = 12.0\text{ g mol}^{-1}C=12.0 g mol−1, and N=14.0 g mol−1\text{N} = 14.0\text{ g mol}^{-1}N=14.0 g mol−1.
Calculate the values of xxx and yyy in the formula of compound Y.
Determine the oxidation number of iron in compound Y.