WebSolution. CFCs are chlorofluorocarbons that deplete the ozone layer. They are rich in chlorine, fluorine, and carbon. (i) Skin cancer. (ii) Damage to eyes. (iii) Damage to the immune system. (iv) Decreased crop yields. They make highly stable compounds with oxygen by splitting the ozone molecules. Hence damaging the ozone layer. 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 … Ver mais 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 … Ver mais The most important reaction of the CFCs is the photo-induced scission of a C-Cl bond: CCl3F → CCl2F + Cl The chlorine atom, written often as Cl , behaves very differently from the chlorine molecule (Cl2). The … Ver mais Carbon tetrachloride (CCl4) was used in fire extinguishers and glass "anti-fire grenades" from the late nineteenth century until around the end of World War II. Experimentation with chloroalkanes for fire suppression on military aircraft began at least as early as the … Ver mais CFCs and HCFCs are used in various applications because of their low toxicity, reactivity and flammability. Every permutation of fluorine, chlorine and hydrogen based on … Ver mais • Chlorofluorocarbons (CFCs): when derived from methane and ethane these compounds have the formulae CClmF4−m and C2ClmF6−m, where m is nonzero. • Hydro-chlorofluorocarbons (HCFCs): when derived from methane and ethane these compounds have … Ver mais 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 … Ver mais Because the time history of CFC concentrations in the atmosphere is relatively well known, they have provided an important constraint on ocean circulation. CFCs … Ver mais
The Ozone Layer Center for Science Education
WebCFCs do not spontaneously occur in nature. They were developed by industrial chemists searching for a safer alternative to refrigerants used until the late 1920s. CFCs are non … Web15 de jan. de 2014 · Volumes of 30 μL and 50 μL of CFCS were inoculated into each well in duplicate, and 400 μL of the medium supplemented with New Born Calf Serum (NBCS) was then added into each well. The microtiter plates were then incubated at 35 °C under 5% CO 2 atmosphere and examined daily by inverted microscope (Olympus, Japan) up to 3 … how much is gold worth per pound
The Ozone Layer Center for Science Education
WebCFCs are compounds made up of chlorine, fluorine and carbon bound together. Because they are extremely stable molecules, CFCs do not react easily with other chemicals in … WebThere are several compounds. formed when nitrogen bonds with oxygen, but the two which are made inside engines are NO and NO 2. These two pollutants are grouped together with the general formula NO x. how do electric bb guns work