Answer:
Either B or C. Composition or the Distance from the Earth.
Answer:
I believe it is 3 and 4. I really hope it is but i am positive :)
Answer:
fe3o4+4h2 - 3fe + 4h2o
therefore coefficient is 4
No. Oxygen isn't even a metal.
Alkaline earth metals are the elements of the second column of the periodic table.
Column is the answer hopefully this helps
