Think about the lab procedure you just read. label each factor below with v for variable or c for constant. temperature of the gas: volume of the gas in the syringe: weight put on the syringe: number of moles of gas in the syringe: mass of gas in the syringe: number of gas molecules in the syringe: hypothesis: if the pressure on a gas is increased, then its volume will decrease because the gas molecules will be pushed closer together. (this is in accordance with boyle's law): p = kv-1 the words underlined above are the only variables for the lab procedure; the other factors are constant. therefore, this procedure will you test the hypothesis.

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).

gold is my favorite solid.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a