The percentage of gases like oxygen, nitrogen and carbon dioxide remain almost the same in the atmosphere because cycling of these gases maintains consistency.
The law of conservation of mass states that mass can neither be created nor destroyed or mass of reactants is always equal to that of products.
C + ...
(D) Helium or nitrogen
To prevent rancidification of foods containing fats and oils, the packed food is surrounded by unreactive gas (like helium, nitrogen, etc.). The inert atmosphere thus created prevents...
