ADD THEM all, and then divide by four. Thats what I would do!
Answer:
Water/H20 is a compound made of hydrogen and oxygen. Although water is the most abundant substance on earth, it is rarely found naturally in its pure form. Most of the time, pure water has to be created. Pure water is called distilled water or deionized water.
Explanation:
There are 2 unpaired electrons in sulphur orbital...