What is the formula mass of K2CO3?

(39.10)2 + (12.01)1 + (16.00) 3 = 138.21 g/m

The formula mass of K2CO3 (Potassium Carbonate) is 138.21 g/m

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).

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.