Pure water has a ph of 7, but some cases of acid precipitation have been recorded with a ph close to 3. this means that acid rain has a concentration of hydrogen ions that is times the hydrogen ion concentration of pure water.

Drag the tiles to the correct locations. each tile can be used more than once, but not all tiles will be used. one or more locations will remain empty. nitrosyl fluoride has the chemical formula nof nitrogen has five valence electrons, oxygen has six, and fluorine has seven. complete the lewis structure for this covalent compound. f n = = = . : : 0 : reset next um. all rights reserved us 2