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It is a hydrocarbon with formula C 5 H 8. The molecular structure consists of three rings of four carbon atoms each. Bicyclo[1.1.1]pentane is a highly strained molecule.
1,1,1,2-Tetrafluoroethane is a non-flammable gas used primarily as a "high-temperature" refrigerant for domestic refrigeration and automobile air conditioners. These devices began using 1,1,1,2-tetrafluoroethane in the early 1990s as a replacement for the more environmentally harmful R-12. Retrofit kits are available to convert units that were ...
Crotonic acid has 4 carbons, is included in croton oil, and is a trans-2-mono-unsaturated fatty acid.C 3 H 5 CO 2 H, IUPAC organization name (E)-but-2-enoic acid, trans-but-2-enoic acid, numerical representation 4:1, n-1, molecular weight 86.09, melting point 72–74 °C, boiling point 180–181 °C, specific gravity 1.027.
Luis (left) and his son Walter Alvarez (right) at the K-Pg Boundary in Gubbio, Italy, 1981. In 1980, a team of researchers led by Nobel prize-winning physicist Luis Alvarez, his son, geologist Walter Alvarez, and chemists Frank Asaro and Helen Vaughn Michel discovered that sedimentary layers found all over the world at the Cretaceous–Paleogene boundary contain a concentration of iridium ...
Emulsions: The two types used are oil in water (oil emulsion muds) and water in oil (invert oil emulsion muds). Oil based mud: Oil based muds contain oil as the continuous phase and water as a contaminant, and not an element in the design of the mud. They typically contain less than 5% (by volume) water.
oils, other than crude oils, having a density at 15°C higher than 900 kg/m 3 or a kinematic viscosity at 50°C higher than 180 mm 2 /s; or bitumen , tar and their emulsions. IMO's Marine Environmental Protection Committee (MEPC) tasked the Pollution Prevention Response Sub-Committee (PPR) to enact a ban on the use and carriage of heavy fuel in ...
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