Solid carbon tetrahydride reacts with oxygen gas to produce carbon dioxide gas and dihydrogen monoxide.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume

i think the answer is terrae but not 100 percent sure. ▓▬▬ §

the correct answer is:

a. formation of precipitation

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)