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  2. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    Carbon dioxide is a chemical compound with the chemical formula CO 2. It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature. As the source of carbon in the carbon cycle, atmospheric CO 2 is the primary carbon source for life on Earth.

  3. Inert gas - Wikipedia

    en.wikipedia.org/wiki/Inert_gas

    An inert gas is a gas that does not readily undergo chemical reactions with other chemical substances and therefore does not readily form chemical compounds. Though inert gases have a variety of applications, they are generally used to prevent unwanted chemical reactions with the oxygen (oxidation) and moisture (hydrolysis) in the air from ...

  4. Supercritical carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Supercritical_carbon_dioxide

    Supercritical carbon dioxide. Supercritical carbon dioxide (sCO2) is a fluid state of carbon dioxide where it is held at or above its critical temperature and critical pressure. Carbon dioxide usually behaves as a gas in air at standard temperature and pressure (STP), or as a solid called dry ice when cooled and/or pressurised sufficiently.

  5. Carbon dioxide in Earth's atmosphere - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide_in_Earth's...

    In Earth's atmosphere, carbon dioxide is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of three main greenhouse gases in the atmosphere of Earth. Water vapor is the primary greenhouse gas, as of 2010, contributing 50% of the greenhouse effect, followed by ...

  6. Chlorine dioxide - Wikipedia

    en.wikipedia.org/wiki/Chlorine_dioxide

    Chlorine dioxide is a chemical compound with the formula ClO 2 that exists as yellowish-green gas above 11 °C, a reddish-brown liquid between 11 °C and −59 °C, and as bright orange crystals below −59 °C. It is usually handled as an aqueous solution. It is commonly used as a bleach.

  7. IUPAC nomenclature of chemistry - Wikipedia

    en.wikipedia.org/.../IUPAC_nomenclature_of_chemistry

    Use. IUPAC nomenclature is used for the naming of chemical compounds, based on their chemical composition and their structure. [1] For example, one can deduce that 1-chloropropane has a Chlorine atom on the first carbon in the 3-carbon propane chain.

  8. Coal - Wikipedia

    en.wikipedia.org/wiki/Coal

    Coal is mostly carbonwith variable amounts of other elements, chiefly hydrogen, sulfur, oxygen, and nitrogen.[1] Coal is a type of fossil fuel, formed when dead plant matterdecays into peatwhich is converted into coal by the heat and pressure of deep burial over millions of years.[2]

  9. Greenhouse gas emissions - Wikipedia

    en.wikipedia.org/wiki/Greenhouse_gas_emissions

    Fossil fuel (use for energy generation, transport, heating and machinery in industrial plants): oil, gas and coal (89%) are the major driver of anthropogenic global warming with annual emissions of 35.6 GtCO 2 in 2019. [ 96 ]: 20. Cement production (burning of fossil fuels) (4%) is estimated at 1.42 GtCO 2.