Apiece of metal weighing 15.442 g is placed in 49.7 ml of ethyl alcohol (d = 798 g/ml) in a graduated cylinder. the alcohol level increases to 51.8 ml. the best value for the density of the metal from these data is:

Volume of ethyl alcohol increase is equal to volume of metal so 51.8 - 49.7 = 2.1 ml. Density = mass / volume so density = 15.442 / 2.1 = 7.35  g/ml

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).