When adding the measurements 4.56 g & 0.01860 g what is the reported value to the correct number of significant figures a. 4.5786 g
b. 4.57860 g
c. 4.579 g
d. 4.58 g

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.

it should be all of them because it asks if you included all of those in your answer

explanation:

a corroding iron, if that's one of your choices

answeridentity;