What is o2(g)?

O2(g) is the chemical formula for oxygen gas. It is a colorless, odorless, and tasteless gas that is the second most abundant gas in Earth's atmosphere, after nitrogen. Oxygen gas is also highly reactive and supports combustion. It is essential for the survival of most living organisms, as it is involved in respiration and energy production. O2(g) can be produced through a variety of methods, including the separation of air or the decomposition of certain chemicals. It is commonly used in industrial processes, medical applications, and as a fuel for rockets.