WebPolystyrene can be solid or foamed. General-purpose polystyrene is clear, hard, and brittle. It is an inexpensive resin per unit weight. It is a poor barrier to oxygen and water vapour and has a relatively low melting point. … WebApr 8, 2024 · So, tin has a low melting point while the metallic bonds in lead will contribute to it's the higher melting point. So, the element with the lowest melting point is the option A. Sn. Note: Silicon due to its smaller size as compared with Pb and Sn; can combine with other atoms forming bigger sized compounds.

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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 … 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 The chlorine atom, … 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 fluorine, chlorine and hydrogen based on … See more • Chlorofluorocarbons (CFCs): when derived from methane and ethane these compounds have the formulae CClmF4−m and C2ClmF6−m, where m is nonzero. • Hydro … See more CFCs were phased out via the Montreal Protocol due to their part in ozone depletion. The atmospheric … See more Because the time history of CFC concentrations in the atmosphere is relatively well known, they have provided an important constraint on ocean circulation. CFCs dissolve in seawater at the ocean surface and are subsequently transported into the … See more david ajemian

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WebMay 12, 2016 · Even though our TFP has more polar C-F bonds, it actually has a lower boiling point, so this observation, which is true, still doesn't explain what we're trying to explain. (laughs) So choice C says, the carbon chains are longer in nonane than they are in … http://www.veganbaking.net/articles/tools/fat-and-oil-melt-point-temperatures WebJan 3, 2013 · Impure gold can be melted at lower temperatures but the lowest quality gold at 10K yellow gold, still needs around 1600 degrees Fahrenheit. Hauser & Miller a primitive blacksmith forge with the right kinds of coals, bellows and additives can easily reach 1400 - 2000 degrees but it takes skill, practice and the proper tools. davida janusz