Six astronauts are still on the space station as part of a planned year-long stay in space, the longest tour of duty in the station's 15-year history.
The molecular formula of citric acid is C 6 H 8 O 7. The chemical formula for citric acid is best shown by a diagram of its complete structural formula. This shows how the atoms are arranged in the molecule. Citric acid has three carboxyl or-COOH groups and is triprotic in nature.
A common example of a molecular compound is water or H 2 O, in which the hydrogen and oxygen atoms share a pair of electrons between them, thus forming covalent bonds. Other compounds like HCl (hydrogen chloride), CH 4 (methane), and CO 2 (carbon dioxide) are also molecular compounds. Ionic Compounds.olecular Compounds: The solid forms of molecular compounds are generally very soft and brittle. The covalent bonds in such compounds are flexible, and bend or break easily. Electrical Conduction. Ionic Compounds: In their solid state, ionic compounds do not conduct electricity.