Answer:
an atom cannot be broken down
I believe the compound is Phosphorus pentoxide
Answer:
During chemical reactions, matter is neither
created nor destroyed; it just changes form.
Explanation:
when iron and oxygen the reactin form Fe2O3 balance equation for this is <span>4Fe + 3O2---> 2Fe2O3
9moles of O2 are needed to produce 6mol of Fe2O3 since the ratio of oxygen to iron(II)oxide is 3:2
hope its help</span>
Answer: D) protons.
The other option that would make the most sense would be electrons, however the mass of an electron is so small that is basically negligible, so it's not included in the atomic mass.