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Bromochlorodifluoromethane (BCF), also referred to by the code numbers Halon 1211 and Freon 12B1, is a haloalkane with the chemical formula C F 2 Cl Br. It is used for fire suppression, especially for expensive equipment or items that could be damaged by the residue from other types of extinguishers. [ 1 ]
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On the Global 200, seven singles reached number one in 2020. Nine artists— Cardi B, Megan Thee Stallion, BTS, Jawsh 685, Jason Derulo, Ariana Grande, Bad Bunny, Jhay Cortez, and Mariah Carey —reached the top of the chart, all for the first time. BTS scored three number-one singles, the most of any artist, and spent a combined five weeks on ...
Bioconcentration. In aquatic toxicology, bioconcentration is the accumulation of a water-borne chemical substance in an organism exposed to the water. [ 1][ 2] There are several ways in which to measure and assess bioaccumulation and bioconcentration. These include: octanol-water partition coefficients (K OW ), bioconcentration factors (BCF ...
Mainstream Rock number-one songs of the 2020s. The Billboard Mainstream Rock chart is compiled from the number of airplay songs received from active rock and heritage rock radio stations in the United States. [ 1] Below are the songs that have reached number one on the chart during the 2020s, listed in chronological order.
For 2020, the list was published on December 3, calculated with data from November 23, 2019, to November 14, 2020. [1] Billboard ' s top Hot 100 artist of 2020 was The Weeknd, [2] whose "Blinding Lights" was the number-one Hot 100 song of the year. It was one of two songs he placed on the list.
e. Chlorofluorocarbons ( CFCs) and hydrochlorofluorocarbons ( HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F), produced as volatile derivatives of methane, ethane, and propane . The most common example is dichlorodifluoromethane (R-12). R-12 is also commonly called Freon ...
Twenty-five artists reached the top of the Hot 100 in 2020, with thirteen— Roddy Ricch, Kid Cudi, Doja Cat, Nicki Minaj, Megan Thee Stallion, DaBaby, 6ix9ine, Harry Styles, BTS, M.I.A., Jawsh 685, 24kGoldn, and Iann Dior —achieving their first number-one single. Ariana Grande and BTS scored three number ones each.