Ireally don't know how to do this someone write chemical formulas for the compounds in each box. the names are found by finding the intersection between the cations and anions. example: the first box is the intersection between the “zinc” cation and the “chloride” anion, so you should write “zncl2”, as shown.

Heres the answer to the rest of that paper as well

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.