Balance all of the following equations i.) Fe + H2O => Fe2O3 + H2
ii.) PbS + O3 => PbSO4 + O2
iii.) KNO3 => KNO2 + O2
iv.) Al + H2O => Al2O3 + H2

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).