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Q35) If 1.5 moles of oxygen combines with Al to form Al2O3, the weight of Al used in the reaction is{Al=27) ... [ EAMCET 1980]


From formula Al2O3
Three Oxygen atoms reacts with 2 atoms of Al
Or Three moles of Oxygen atoms=1.5 moles of Oxygen
∴ 1.5 moles of oxygen will react with 2 moles of Al=2×27=54gAnswer: (b)