A deep underground cavern contains 3.35 × 10 ^ 6 L of ethane gas ( C2 H6) at a pressure of 2.50 × 10 ^ 3 kpa & temperature of 370 degree Celsius. How many grams of C2H6 does the cavern contain? ( R = 8.31 L. kpa / K/mol)

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).

a corroding iron, if that's one of your choices

b) nuclear ive learned that in a pedtrodic table