Answer…./………………………….

Given data:
1). One mole of Aluminium oxide requires one mole of O2.

Required:
1) number of moles of Aluminium oxide when 15 moles of Cohen is produce?

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From the balance equation;

1 mole of Aluminium oxide when decomposes it produce 1 mole of oxygen. Similarly when 1.5 moles of Aluminium oxide decomposes it will releases 1.5 moles of oxygen.

1.5 Al2O3—————1.5 O2

Convection is da answer my dood