how does hydrogen peroxide react with trichloroethane/dichloroethene. Equation and explanation please

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

Draw the lewis dot structure for each of the following polyatomic ions

Mercury metal is poured into a graduated cylinder that holds exactly 22.5 ml the mercury used to fill the cylinder mass in 306.0 g from this information calculate the density of mercury