Which properties change the composition of a substance? A chemical properties

B physical properties

C neither chemical nor physical properties

D chemical and physical properties

organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

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.