_Al2O3 + _Fe - _Fe304 +_AI Balancing the equation requires inserting the correct coefficients to reflect
that no atoms are gained or lost in the reaction. Which is the correct set of
four coefficients, in order?
A. 4, 9, 3,8
O
B. 2, 8, 3,6
C. 3, 9, 3,6
D. 1,3,1,2

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).

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.