4. What need drove King John of Portugal to hire mathematicians? a.
Navigation
b. Warfare
c.
Intellectual curiosity
d. Accounting

c is the answer because when something is left after something evaporates that shows the chemical change.

m=9

step-by-step explanation:

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).