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Methane (US: / ˈ m ɛ θ eɪ n / METH-ayn, UK: / ˈ m iː θ eɪ n / MEE-thayn) is a chemical compound with the chemical formula CH 4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas.
Methane vapor pressure vs. temperature. Uses ... given in Lange's Handbook of Chemistry, 10th ed. Note that formula loses accuracy near T crit = −82.6 ...
Refrigerant concentration limit / immediately dangerous to life or health in parts per million (volume per volume) and grams per cubic meter Molecular mass in atomic mass units Normal boiling points for pure substances, bubble and dew points for zeotropic blends, or normal boiling point and azeotropic temperature for the azeotropic blends, at ...
formula IUPAC name CAS registry number Common name Other names Molecule CHF 3: trifluoromethane 75-46-7 fluoroform: Freon 23, R-23, HFC-23 CHClF 2: chlorodifluoromethane 75-45-6 chlorodifluoromethane: R-22, HCFC-22 CHCl 3: trichloromethane 67-66-3 chloroform: R-20, methyl trichloride CHBrCl 2: bromodichloromethane 75-27-4 bromodichloromethane ...
Mineral oil used with R-12 is not compatible with R-134a. Some oils designed for conversion to R-134a are advertised as compatible with residual R-12 mineral oil. Illegal replacements for R-12 include highly flammable hydrocarbon blends such as HC-12a , the flammability of which has caused injuries and deaths.
Freon-12, for example, indicates a methane derivative (only two numbers) containing two fluorine atoms (the second 2) and no hydrogen (1-1=0). It is therefore CCl 2 F 2. [8] Another equation that can be applied to get the correct molecular formula of the CFC/R/Freon class compounds is to take the numbering and add 90 to it.
FWC cut the daily bag limit for dolphin, a fish also called mahi-mahi, from 10 to 5 per angler and 60 to 30 per vessel off Florida starting May 1.
Alkanes have a low solubility in water, so the content in the oceans is negligible; however, at high pressures and low temperatures (such as at the bottom of the oceans), methane can co-crystallize with water to form a solid methane clathrate (methane hydrate). Although this cannot be commercially exploited at the present time, the amount of ...