You Discover That the Complex Decomposes in Water

Multiple Choice

You discover that the complex decomposes in water. You dissolve 0.1000 g of the complex in H₂O and add excess NaHg(SCN) ₄, which precipitates Co(II) as CoHg(SCN) ₄(s) . After the precipitate is washed and dried, its mass is 0.1102 g. How many grams of cobalt are contained in 0.100 g of the complex?

A) 0.0396 g
B) 0.0132 g
C) 0.1102 g
D) 0.437 g
E) 0.0548 g