In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Question: What shape are the eight sides of an octahedra? Answer: triangles
The eight sides of an octahedra are in the shape of a triangles.

Question: A complete ionic equation is a chemical equation in which the dissolved ionic compounds are written as what? Answer: separated ions
A complete ionic equation is a chemical equation in which the dissolved ionic compounds are written as separated ions.

Question: Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of what exist? Answer: equilibrium

Expansion of a gas into a vacuum is irreversible because the external pressure is measurably less than the internal pressure of the gas, and no states of equilibrium exist.

