How many moles of aluminum oxide will be produced from 0.50 mol of oxygen? 4 al + 3 o2 2 al2o3?

From the equation;

4 Al + 3 O2 = 2 Al2O3

The mole ratio of Oxygen is to Aluminium hydroxide is 3:2.

Therefore; moles of Al2O3 is

(0.5/3) * 2 = 0.333 moles

Therefore; The moles of aluminium oxide will be 0.333 moles