Equal weight of Aluminium and Oxygen are allowed to combine with each other to produce ${\mathrm{Al}}_2{\mathrm{O}}_3$. Identify the correct statement(s).
 $\left(4\mathrm{Al}+3{\mathrm{O}}_2⟶2{\mathrm{Al}}_2{\mathrm{O}}_3\right)$ (At wt. of $\mathrm{Al}=27,\mathrm{O}=16$)

Aluminium metal is the limiting reagent

The fraction of excess reagent left unreacted is $\frac{1}{9}$.

The mass of ${\mathrm{Al}}_2{\mathrm{O}}_3$ produced is $\frac{51}{27}$ times the mass of oxygen taken initially.

The mass of aluminium and oxygen is left unreacted and the mass of ${\mathrm{Al}}_2{\mathrm{O}}_3$ produced is double the mass of aluminium taken initially