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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 ]
[15] k 1 is the rate constant for chemical uptake from water at the respiratory surface (L*kg −1 *d −1). [15] C WD is the chemical concentration dissolved in water (g*L −1 ). [ 15 ] k 2 ,k E ,k G ,k B are rate constants that represent excretion from the organism from the respiratory surface, fecal excretion, metabolic transformation, and ...
Tris (pentafluorophenyl)borane, sometimes referred to as "BCF", is the chemical compound (C6F5)3B. It is a white, volatile solid. The molecule consists of three pentafluorophenyl groups attached in a "paddle-wheel" manner to a central boron atom; the BC3 core is planar. It has been described as the “ideal Lewis acid ” because of its high ...
Three hundred and forty-three firefighters died on 9/11, which at the time was nearly half the number of on-duty deaths in the New York City Fire Department’s entire 100-year history.
The number of sexual assaults in the U.S. military is likely two to four times higher than government estimates, according to a new study out of Brown University.. The study, completed by the ...
Polymer fractionation. Polymers are chainlike molecules that are made of the same repetition unit. With a few exceptions such as proteins, a polymer consists of a mix of molecules with different chain lengths. Therefore, average values are given for the molecular weight like the number average, the weight average or the viscosity average molar ...
September 6, 2024 at 11:44 AM. “I would be dead without it,” Katy Perry said about a monumental shift in her life after she broke up with her current fiancé, Orlando Bloom. The separation ...
If you can’t return the Popsicles to the store for a refund, head for the recall section of the company website. Questions should be directed to Unilever at 888-926-3554, 8:30 a.m. to 9 p.m ...