A magnet because it will remove only metal and not the saw dust
Hope this helps
Zinc Oxide is the IUPAC name for ZnO
A change of one unit on the pH scale represents a change in the concentration of hydrogen ions by a factor of 10, a change in two units represents a change in the concentration of hydrogen ions by a factor of 100. Thus, small changes in pH represent large changes in the concentrations of hydrogen ions.
