The reaction rate is the blank with which reactant turn into Products

the answer should be speed)

Explanation:

hope it helps like the pic by the way

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’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter