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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 »

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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 »

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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 »

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Hydrogen peroxide bubbles when it is poured onto a cut or a wound because of an enzyme called catalase, which catalyzes the breakdown of hydrogen peroxide into its constituent molecules of water and oxygen. The bubbles a... More »

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Carbon, hydrogen and oxygen are all elements that make up lipids. Lipids are one of the four major groups of organic molecules. The other three are carbohydrates, proteins and nucleic acid (DNA). One of the key character... More »

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The main elements in plastic include carbon, oxygen, hydrogen and chlorine. Some plastics may also contain sulfur, depending on how they are made. More »

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Oxidation reactions occur when the reactant loses electrons and may involve the addition of oxygen or the loss of hydrogen, while reduction reactions occur when the reactant gains electrons and may involve the loss of ox... More »

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