In a reversible reaction, chemical equilibrium is attained when the select one: a. rate of the forward reaction is less than the rate of the reverse reaction b. concentration of the reactants reaches zero c. rate of the forward reaction is greater than the rate of the reverse reaction. d. concentration of the products remains constant

if you're asking what comes out, it's steam.

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).