substancas
Substancas is not a standard term in science; in many Portuguese texts the correct plural is substâncias. The word may appear as an informal or misspelled form. This article treats substancas as referring to the general concept of chemical substances and explains the standard meaning in scientific usage.
A substance is a form of matter with a definite composition and distinct properties. Substances are divided
Mixtures are combinations of two or more substances in which each component retains its own properties. They
In practice, substances are described in chemical nomenclature, safety data sheets, and regulatory frameworks. Safety data
Examples include water (a compound), sodium chloride (table salt, a compound), oxygen (an element), and ethanol