1.

1 1/2 moles of oxygen combine with Aluminimum to form AL O, then weight of Aluminium metal used in thereaction is (al = 27) -2A1+ 02 —>A1,02(440 cm

Answer»

The balanced reaction is 4Al + 3O2= 2Al2O3

​3moles of O2requires 4 moles of Al0.5 moles of O2requires = 4 X 0.5/3 = 2/3 moles of Al

Mass of 2/3 mol of Al = 2/3 mol X 27g/mol= 18 g

Where 27 is the mass of 1 mole Al

Answer:18gm



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