A rough & ready method involves memorising three numbers â 3, 5 and 8 â and the fact that 1 km in miles is approximately equal to the first of these numbers divided by the second, or alternatively the second divided by the third. That is: 1 km â 3/5 or 5/8 miles.
Ammonium chloride solutions with ammonia are used as buffer solutions. In paleontology, ammonium chloride vapor is deposited on fossils, where the substance forms a brilliant white, easily removed and fairly harmless and inert layer of tiny crystals.
Nitrification. Nitrification is the process by which ammonium (NH 4 +) or ammonia (NH 3) is oxidized into nitrite (NO 2 -) by ammonia-oxidizing bacteria or AOB, often Nitrosomonas spp, and the NO 2 - further oxidized into nitrate (NO 3 -) by nitrite-oxidizing bacteria or NOB, often Nitrobacter spp.