The coefficient is a number that placed 1. in front of the elements
2. only in the reactant
3. after reaction occur

in front of the elements

Explanation:

The coefficient tells you how much of each element there is in a molecule.

Hope that helps.

yes it is balanced

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).