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.
When you dissolve ammonium chloride in water, I have this: NH4Cl --> NH4 + Cl- My first question is : why don't you include water in this first reaction? Why does it go straight to NH4 and Cl, instead of in for example NH3 +H2O --> NH4 + OH , where water is included in the first reaction.