A complex compound of chromium, Y, has the formula K[Cr(NCS)x(NH3)y]\text{K}[\text{Cr}(\text{NCS})_x(\text{NH}_3)_y]K[Cr(NCS)x(NH3)y] and contains NCS−\text{NCS}^-NCS− 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: Cr=52.0 g mol−1\text{Cr} = 52.0\text{ g mol}^{-1}Cr=52.0 g mol−1, S=32.1 g mol−1\text{S} = 32.1\text{ g mol}^{-1}S=32.1 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 chromium in compound Y.
