Chemistry

 A) When 6 grams of (Ni(H2O)6)CL2 is dissolved in 10 mL of warm water and 15 mL of NH3, what is the percent yield of Ni? B) When 6 grams of (Ni(H2O)6)CL2 is dissolved in 5g of ethylenediamine (d=.89 g/mL), what is the percent yield of Ni?