Question

Suppose you are studying coordination compounds of Co(II) with the ligand pyridine (py, C5H5N, MW = 79.10). You isolate a crystalline compound and since the only available ions are chloride and nitrate, you hypothesize the empirical formula of the coordinaton compound must be Co(II)w(py)x(Cl)y(NO3)z. you discover that the complex decomposes in water. you dissolve 0.1000g of the complex in water and add excess NaHg(SSN)4. after the precipitate washed and dried its mass is 0.1102g. how many grams of cobalt are contained in the 0.1000g of the complex?