When preparing a pure and dry sample of ammonium chloride, we cannot dry the sample of ammonium chloride by evaporating it to dryness. Explain why this is so.

Why do lunar and solar eclipse not happen every month

Describe the hybridization of each carbon and nitrogen atom in each of the following structures

The element chlorine has two stable isotopes, chlorine-35 with a mass of 34.97 amu and chlorine-37 with a mass of 36.95 amu. from the atomic weight of cl = 35.45 one can conclude that: