Chemistry Question? please help!!!

Posted on 2014-12-04 07:26:00 in Chemistry by MAT

1) What are the substances that allow reduction to take place?

2) What are the substances that permit oxidation to take place?

3) It is a reaction when an atom, ion or molecule increases its oxidation number.

4) It is a reaction requiring energy to break down a complicated substance into two or more substances.

5) It is a process used to follow the law of conservation of matter.

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