I'LL GIVE 30 POINTS AND A BRAINIEST:)

Q 1 oxygen 2 6

Q2 D

Q3 B

4 Mg

5 B

Explanation:

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

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