Which is a correct statement of newton's second law?

an object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force.

when an object experiences a net force, it will accelerate at a rate determined by its mass.

every action has an equal and opposite reaction.

every mass in the universe is attracted to every other mass in the universe.

Newton's second law of motion can be formally stated as follows:

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.

b.final