Pure hydrogen peroxide is composed of two molecules of hydrogen and two molecules of oxygen, so its chemical formula is H2O2. However, the hydrogen peroxide sold in most stores is actually a solution, which typically onl... More » Science Chemistry

The chemical formula for hydrogen gas is H2. Its molar mass is 2.016 grams per mole, and it exists as a gas at standard temperature and pressure, where its density is 0.09 grams per liter. Hydrogen's melting point is -43... More » Science Chemistry Atoms & Molecules

The hydrogen peroxide compound consists of two hydrogen atoms and two oxygen atoms. The chemical formula is H2O2. Bottles of the compound are commonly sold in drug stores and supermarkets. More » Science Chemistry Solutions & Mixtures
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