The compound CoCl₂ · 2 H₂O · 4 NH₃ may be one of the hydrate isomers [CoCl(H₂O)(NH₃)₄]Cl · H₂O or [Co(H₂O)₂(NH₃)₄]Cl₂. A 0.10 M aqueous solution of the compound is found to have a freezing point of –0.56 °C. Determine the correct formula of the compound. The freezing-point depression constant for water is 1.86 mol kg^–1 °C, and for aqueous solutions, molarity and molality can be taken as approximately equal.