Which of the following is not a variable property for a gas? a. mass b. density c. volume d. shape

Mass

Explanation:Gases are matter, they have volume, their volume is variable. Gas can be compressed like in a bike tire, so it changes shape. As a substance changes from a solid to a liquid to a gas its density generally decreases. So gas has volume, shape and density.

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).