It gains or loses electrons to become like the Noble gases having 8 valence electrons to become the most stable.
There are 22 bonding parts
Answer: 714 g Al2O3
Explanation: Solution attached
First convert mass of O2 to moles
Do the mole ratio between O2 and Al2O3 from the balanced equation.
Convert moles of Al2O3 to mass using its molar mass.