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The standard enthalpy change of combustion, ΔH° c, expressed per mole of ammonia and with condensation of the water formed, is −382.81 kJ/mol. Dinitrogen is the thermodynamic product of combustion: all nitrogen oxides are unstable with respect to N 2 and O 2, which is the principle behind the catalytic converter.
Lithium will ignite and burn in oxygen when exposed to water or water vapor. In moist air, lithium rapidly tarnishes to form a black coating of lithium hydroxide (LiOH and LiOH·H 2 O), lithium nitride (Li 3 N) and lithium carbonate (Li 2 CO 3 , the result of a secondary reaction between LiOH and CO 2 ). [ 48 ]
DDT is similar in structure to the insecticide methoxychlor and the acaricide dicofol.It is highly hydrophobic and nearly insoluble in water but has good solubility in most organic solvents, fats and oils.
"Reserves" refers to the amount assumed recoverable at current market prices and "resources" refers to estimated amounts of such a grade or quality that they have reasonable prospects for economic extraction. [84] [85] Unprocessed phosphate rock has a concentration of 1.7–8.7% phosphorus by mass (4–20% phosphorus pentoxide).
Liquid xenon has a high polarizability due to its large atomic volume, and thus is an excellent solvent. It can dissolve hydrocarbons, biological molecules, and even water. [54] Under the same conditions, the density of solid xenon, 3.640 g/cm 3, is greater than the average density of granite, 2.75 g/cm 3. [53]
The Consumer Product Safety Commission (CPSC) regulates consumer fireworks at the federal level through the Federal Hazardous Substances Act (FHSA). The National Fire Protection Association (NFPA) sets forth a set of codes that give the minimum standards of display fireworks use and safety in the U.S. Both state and local jurisdictions can ...