Search results
Results From The WOW.Com Content Network
Ultra-compact HII regions are among the best tracers of high-mass star formation. The dense material surrounding UCHII regions is likely primarily molecular. Since a complete study of massive star formation necessarily involves the cloud from which the star formed, ammonia is an invaluable tool in understanding this surrounding molecular material.
At 15.6 °C (60.1 °F), the density of a saturated solution is 0.88 g/ml; it contains 35.6% ammonia by mass, 308 grams of ammonia per litre of solution, and has a molarity of approximately 18 mol/L. At higher temperatures, the molarity of the saturated solution decreases and the density increases. [ 8 ]
Standard molar entropy, S o liquid? J/(mol K) Heat capacity, c p: 80.80 J/(mol K) Gas properties Std enthalpy change of formation, ...
Ammonium is a modified form of ammonia that has an extra hydrogen atom. It is a positively charged molecular ion with the chemical formula NH + 4 or [NH 4] +.It is formed by the addition of a proton (a hydrogen nucleus) to ammonia (NH 3).
Molar mass: 132.14 g/mol Appearance Fine white hygroscopic granules or crystals Density: 1.77 g/cm 3: Melting point: 235 to 280 °C (455 to 536 °F; 508 to 553 K ...
Molar mass: 231.78 g·mol −1 Appearance violet solid Density: 1.51 g/cm 3: Melting point: decomposes Solubility: soluble in NH 3: Structure Coordination geometry ...
Ammonium carbamate is a chemical compound with the formula [NH 4][H 2 NCO 2] consisting of ammonium cation NH + 4 and carbamate anion NH 2 COO −.It is a white solid that is extremely soluble in water, less so in alcohol.
Hydroxylammonium chloride is a chemical compound with the formula [NH 3 OH] + Cl −.It is the hydrochloric acid salt of hydroxylamine (NH 2 OH).Hydroxylamine is a biological intermediate in nitrification (biological oxidation of ammonia with oxygen into nitrite) and in anammox (biological oxidation of nitrite and ammonium into dinitrogen gas) which are important in the nitrogen cycle in soil ...