Plasma occurs in electrical sparks. these sparks contain a) free protons. b) free molecules. c) ions and electrons. d) neutrons and protons.

option C) ions and electrons.

Explanation:

The answer involves just the definition of plasma.

Plasma is a state of the matter (the others are solid, liquid, and gas).

Plasma consists in a mixture of ions and electrons. The ions and electrons in plasma are intimately mixed and contains equal amounts of positive and negative charges.

Plasma is similar to gas, but, due to the presence of charged particles, in plasma the electromagnetic forces are very important.

it's filtration, but this is an assumption so my apologies if i got this

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.