A compound of cobalt, K, has the formula NH4[Co(SCN)x(NH3)y]\text{NH}_4[\text{Co}(\text{SCN})_x(\text{NH}_3)_y]NH4[Co(SCN)x(NH3)y] and contains SCN−\text{SCN}^-SCN− and NH3\text{NH}_3NH3 ligands.
The percentage by mass of three of the elements in compound K is shown below:
Use the following molar masses: Co=58.9 g mol−1\text{Co} = 58.9\text{ g mol}^{-1}Co=58.9 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 K.
Determine the oxidation number of cobalt in compound K.
