the chemical formula for an emerald is be₃al₂(sio₃)₆. an emerald can be described as\na pure substance…

the chemical formula for an emerald is be₃al₂(sio₃)₆. an emerald can be described as\na pure substance because it is a compound.\na pure substance because it is an element.\nan impure substance because it is chemically combined.\nan impure substance because it is a mixture.

the chemical formula for an emerald is be₃al₂(sio₃)₆. an emerald can be described as\na pure substance because it is a compound.\na pure substance because it is an element.\nan impure substance because it is chemically combined.\nan impure substance because it is a mixture.

Answer

Brief Explanations:

A pure substance can be either an element or a compound. An element consists of only one - type of atom, while a compound is made up of two or more different types of atoms chemically combined in a fixed ratio. Emerald, with the chemical formula $Be_3Al_2(SiO_3)_6$, is a compound as it is composed of multiple elements ($Be$, $Al$, $Si$, $O$) chemically bonded together. Compounds are pure substances.

Answer:

a pure substance because it is a compound.