Well, all of this we owe it to Bohr who analyzed the atomic emission spectrum of hydrogen and he could probe matematically that it was a result of movement of e- from an especific energy level to a lower one. The understanding of levels of energy took to the development of the atomic theory
D is the answer cause two h20 + o2(g)
I believe the answer would be 14.25 an hour because $85.50/ 6 would be 14.25 but i could be wrong.
The substance of which physical objects are composed, not counting engergies or force fields which are genearlly not counted as matter, although can contribute to the mass of an object.
Or it may be solid, liquid, mass or the 4th state of matter,plasma
