Two oxygen atoms in a oxygen molecule share two electrons. Oxygen atoms only have 6 valence electrons. They want 8 electrons so they need to steal two or share two.
2Al₂O₃ = 4Al + 3O₂
M(A₂O₃)=101.96 g/mol
m(Al₂O₃)=250 g
n(O₂)=3m(Al₂O₃)/{2M(Al₂O₃)}
n(O₂)=3*250/{2*101.96}=3.678 mol
Answer:
physical
Explanation:
Common changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization. I hope this helps. :)
It would be C, because Ionic bonds have to deal with valence electrons ( the outer shell ones)
