When discussing the formula of manganese (II) acetate tetrahydrate
Fuzimin manganese (II) acetate tetrahydrate, it is necessary to study its elemental composition and combination. The chemical symbol of manganese is Mn, which often shows + 2 valence in compounds. This is its common valence state, which is derived from its electronic arrangement structure.

Acetate, expressed in $CH_3COO ^ - $, this group is negative monovalent. According to the principle that the sum of positive and negative valence algebras in compounds is zero, the divalent manganese ion needs to be combined with two acetates to achieve charge equilibrium. Therefore, the part formed by the combination of manganese and acetate is $ (CH_3COO) _2Mn $.

Furthermore, tetrahydrate, that is, the compound binds to tetramolecular water. The chemical formula of water is $H_2O $, and the tetramolecular water interacts with $ (CH_3COO) _2Mn $to form a specific crystalline hydrate structure.

In summary, the chemical formula of manganese (II) tetrahydrate acetate is fully expressed as $ (CH_3COO) _2Mn\ cdot4H_2O $. This formula accurately presents the type, quantity and binding mode of its constituent elements. It is a key identification in chemical research and experimental operation, which can help researchers clarify its chemical properties and reaction mechanism, so as to facilitate the development of various chemical work.