Search results
Results From The WOW.Com Content Network
Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found in water, organic compounds, as the gas H 2 (dihydrogen), and in other molecular forms. The most common isotope of hydrogen (protium, 1 H) consists of one proton , one electron , and no neutrons .
In organic chemistry and biochemistry, important examples include amino acids and derivatives of citric acid. Although an amphiprotic species must be amphoteric, the converse is not true. For example, a metal oxide such as zinc oxide, ZnO, contains no hydrogen and so cannot donate a proton. Nevertheless, it can act as an acid by reacting with ...
Steam methane reforming (SMR) produces hydrogen from natural gas, mostly methane (CH 4), and water. It is the cheapest source of industrial hydrogen, being the source of nearly 50% of the world's hydrogen. [34] The process consists of heating the gas to 700–1,100 °C (1,300–2,000 °F) in the presence of steam over a nickel catalyst.
decomposition of organic matter; biological activity; Serpentinization is thought to produce approximately 80% of the world's hydrogen, especially as seawater interacts with iron- and magnesium-rich (ultramafic) igneous rocks in the ocean floor. Current models point towards radiolysis as the source of most other natural hydrogen.
Many organic compounds also contain H atoms, such as hydrocarbons and organic matter. Given the ubiquity of hydrogen atoms in inorganic and organic chemical compounds, the hydrogen cycle is focused on molecular hydrogen, H 2. As a consequence of microbial metabolisms or naturally occurring rock-water interactions, hydrogen gas can be created.
By some definitions, "organic" compounds are only required to contain carbon. However, most of them also contain hydrogen, and because it is the carbon-hydrogen bond that gives this class of compounds most of its particular chemical characteristics, carbon-hydrogen bonds are required in some definitions of the word "organic" in chemistry. [ 12 ]
WASHINGTON — White House adviser Alina Habba said Tuesday that military veterans affected by the DOGE-led layoffs of federal workers may not be "fit to have a job at this moment."
The process is commonly employed to reduce or saturate organic compounds. Hydrogenation typically constitutes the addition of pairs of hydrogen atoms to a molecule, often an alkene . Catalysts are required for the reaction to be usable; non-catalytic hydrogenation takes place only at very high temperatures.