True becuase the substance changed into another substance which is a example of a chemical reaction.
Answer:
represents oxidation.
Explanation:
Oxidation-reduction reaction or redox reaction is defined as the reaction in which oxidation and reduction reactions occur simultaneously.
Oxidation reaction is defined as the reaction in which a substance looses its electrons. The oxidation state of the substance increases.
Example:
Reduction reaction is defined as the reaction in which a substance gains electrons. The oxidation state of the substance gets reduced.
Example: 
represents oxidation.
It’s mass number would be 5 as it’s the protons and the neutrons added together
Answer:
Economy is always at the full employment level of output
Explanation:
The economy in a classical long-run supply model will always have the same economic output