Well first you need to convert all the substances into there other name. For example: you would change #1 to Mg+O=MgO. That would be known as a synthesis reaction.
1. C. Potassium and Iodine
2. A. Solid
My answer will be B and D
Because chemical energy is stored the chemical reaction takes place the stored chemical energy is released.
Answer:
31536000 seconds
Explanation:
there are 31536000 seconds in one year
