A pre-test or pre-inspection is an unofficial test provided as an option to vehicle owners prior to having an official Smog Check performed on the vehicle. Smog Check stations may charge for this service if authorized by the consumer.
Ammonia or azane is a compound of nitrogen and hydrogen with the formula NH 3. It is a colourless gas with a characteristic pungent smell. Ammonia contributes significantly to the nutritional needs of terrestrial organisms by serving as a precursor to food and fertilizers.iquid ammonia is an ionising solvent, although less so than water, and dissolves a range of ionic compounds, including many nitrates, nitrites, cyanides and thiocyanates. Most ammonium salts are soluble and act as acids in liquid ammonia solutions. The solubility of halide salts increases from fluoride to iodide.
NH3 is not an ionic compound but a molecular compound. This is due  to the fact that it has two different atoms that are not metallic. The Periodic Table of Elements Life is sustained by a number of chemical elements. 2  They are responsible for the birth of planets and the evolution of cells to complex organisms. 3  Everyone knows that withoutâ¦.