COMPOSICIÓN PORCENTUAL Cloruro de hierro (II) Hipoclorito de sodio Metano Óxido de oro (III) Ácido hipoyodoso Hidruro de magnesio Pentayoduro de arsénico Permanganato de potasio Ácido dicrómico Dicromato de Potasio Cromato de bario Hidróxido de manganeso (II) Silano Óxido de hierro (III) Arsina Sulfato de manganeso (III) Hidróxido de sodio Hidrogenosulfato de estroncio Disulfuro de carbono Ácido sulfuroso

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.

did anyone actually do this? like if anyone has submitted this i rly need .