O Click HERE if you need more examples of CER • Answer the question below in the text entry box:
How are different kinds of molecules different? How are they
similar? Explain how you know. What is your evidence?

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.

i think its 100.

hope this !