Which is a balanced chemical equation?
a. c7h16 + 5o2 +6co2 + 4h2o
b. c7h16 + 11o2 → 7co2 + 8h2o
c. c7h16 + 14o2 → 7co2 +5h2o
d. c7h16 + 22o2 → 14co2 + 16h2o

B. C7H16 + 11O2 → 7CO2 + 8H2O

   C7H16 + 11O2 → 7CO2 + 8H2O

Because, it has 7 carbon atoms, 16 hydrogen atoms and 22 oxygen atoms on each side of the equation.

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).