What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

An electrolyte is used in an alkaline zinc/manganese dioxide cell. There are two electrodes in the battery, one is positive (zinc) and the other is negative (manganese dioxide). Oxidation takes place at anode, while at cathode reduction reaction occurs.  

The half-reactions are:

Reaction at Anode:

Zn(s) + 2OH−(aq) → ZnO(s) + H2O(l) + 2e− (Oxidation)

Reaction at Cathode:

2MnO2(s) + H2O(l) + 2e− → Mn2O3(s) + 2OH−(aq) (Reduction)

Overall Reaction:

Zn(s) + 2MnO2(s) ⇌ ZnO(s) + Mn2O3(s)

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).