A molecule is composed of two or more elements that are covalently bonded. A formula unit indicates the lowest whole number ratio of ions in an ionic compound.Click to see full answer. Herein, is HCl a molecule or formula unit?The hydrogen chloride molecule HCl is a simple diatomic molecule consisting of a hydrogen atom H and a chlorine atom Cl connected with a covalent single bond. Since the chlorine atom is much more electronegative than the hydrogen atom, the covalent bond between the atoms is quite polar.Beside above, is methanol molecular or ionic? Substance Formula Classification (ionic, polar, nonpolar covalent) methanol CH3OH polar water H2O polar biodiesel C15-20H28-38O2 nonpolar covalent magnesium silicate Mg3Si4O10(OH)2 ionic Just so, why do we use formula unit instead of molecule? Ionic compounds do not exist as individual molecules; a formula unit thus indicates the lowest reduced ratio of ions in the compound. A chemical formula shows the kinds and numbers of atoms in the smallest representative unit of a substance.Is c3h8 a molecule or formula unit?For example, if the empirical formula of a compound is C3H8 , its molecular formula may be C3H8 , C6H16 , etc. A formula unit in chemistry is the empirical formula of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations.