The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by NiCl2·6H2O to form a stable coordination compound. Assume that both the reactions are 100% efficient.

(NH4)2SO4 (132g = 1 mol) + Ca(OH)2 → CaSO4·2H2O (gypsum, M = 172) + 2NH3
1584g = 12mol + Ca(OH)2 → CaSO4·2H2O + 2NH3 (24 moles)
NiCl2·6H2O (238g = 1mol) + 6NH3 → [Ni(NH3)6]Cl2 (M = 232) + 6H2O
952g = 4mol + 6NH3 (24 mol) → [Ni(NH3)6]Cl2 (4 mol) + 6H2O
Total mass = 12 × 172 + 4 × 232 = 2992g.