How much 0.3MMgCl2 solution in liters will completely precipitate the Ag ion in 0.7L of 0.16MAgNO3 solution

Achemist determined by measurements that 0.0300 most of beryllium oxide participate in a chemical reaction calculate the mass of berlylium oxide that participates

Name the element in group 17, period 2. (periodic table)

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?