Which of the following is a possible formula unit? (2 points) select one: a. pbo b. li2b c. al2pb3 d. clo

a. PbO.

Explanation:

Choice a: is the right answer PbO

Choice b: is a wrong choice Li₂B

Choice c: is a wrong choice Al₂Pb₃

Choice d: is a wrong choice ClO

you need to give more information

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.