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.
1 The Citric Acid Cycle: Step by Step The Citric acid cycle, also known as tricarboxylic acid (TCA) cycle, as well as the Krebs cycle, is a series of chemical reaction used by aerobic organisms to generate energyâ¦. 2  The Periodic Table of Elements Life is sustained by a number of chemical elements.