The function of mordant in the gram staining is to expose grams positive cell to the decolorizer which dissolves the lipids in the cell wall thus allowing the crystals violent-iodine to leach out of the cell. This facilitate the cell subsequently be stained by with safranin.
The element that is most reactive to gas is Hydrogen
Idk how to write the formula I had this same question
It can tell us how old they are and how and where they moved in the past.