WebStudy with Quizlet and memorize flashcards containing terms like 1. The US governmental agency responsible for regulating air pollutants is the A. National Park Service B. Fish and Wildlife Service C. Bureau of Reclamation D. Bureau of Remediation E. Environmental Protection Agency, 2. Primary pollutants are those that are A. Released directly in … WebMar 20, 2024 · halocarbon, any chemical compound of the element carbon and one or more of the halogens (bromine, chlorine, fluorine, iodine); two important subclasses of …

Scientists discover the source of new CFC emissions

WebNatural sources of the pollutant include volcanic eruptions, forest fires, and bacterial processes, but most anthropogenic sources come from automobiles. Natural emissions of the pollutant far exceed anthropogenic emissions. Which pollutant has these characteristics? Carbon Monoxide (CO) Choose the air pollutant that matches each description. WebA) the impact of natural processes on the earth's environment. B) air pollution from a natural source. C) the magnitude of the chemistry associated with the environment. D) The Kilauea volcano is an example of all of the above. D One of the earliest recorded records of polluted air was written by the Roman ________ in 61 A.D. A) Caesar Augustus pull out coffee station

Chapter 16 Flashcards Quizlet

WebApr 8, 2024 · CFC stands for chlorofluorocarbon, which is an organic compound made up of carbon, fluorine, and chlorine. Hydrochlorofluorocarbons, or HCFCs, are CFCs that … 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 representative is dichlorodifluoromethane (R-12). … See more As in simpler alkanes, carbon in the CFCs bond with tetrahedral symmetry. Because the fluorine and chlorine atoms differ greatly in size and effective charge from hydrogen and from each other, the methane-derived … See more The most important reaction of the CFCs is the photo-induced scission of a C-Cl bond: CCl3F → CCl2F + Cl See more Carbon tetrachloride (CCl4) was used in fire extinguishers and glass "anti-fire grenades" from the late nineteenth century until around the end of See more CFCs and HCFCs are used in various applications because of their low toxicity, reactivity and flammability. Every permutation of … See more • Chlorofluorocarbons (CFCs): when derived from methane and ethane these compounds have the formulae CClmF4−m and C2ClmF6−m, … See more CFCs were phased out via the Montreal Protocol due to their part in ozone depletion. The atmospheric impacts of CFCs are not limited to their role as ozone-depleting chemicals. Infrared absorption bands prevent heat at that … See more Because the time history of CFC concentrations in the atmosphere is relatively well known, they have provided an important … See more WebNov 1, 2024 · HFCs are made of carbon, fluorine and hydrogen. They are exclusively synthetic, meaning they have no known natural sources. To understand why they came into existence requires a quick history... pull out cooker hood