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JEE Main202523 Jan 2025Evening ShiftChemistrySome Basic Concepts of ChemistryActual

When 81.0 g of aluminium is allowed to react with 128.0 g of oxygen gas, the mass of aluminium oxide produced in grams is_______ - (Nearest integer) Given : Molar mass of Al is 27.0 ~g ~mol ⁻¹ Molar mass of O is 16.0 ~g ~mol ⁻¹

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Step-by-step solution

aligned & 4 Al +3 O ₂ 2 Al ₂ O ₃ & 81 27 =3 mole 128 32 =4 ~mole aligned Limiting reagent aligned & mole of Al ₂ O ₃ formed = 1 2 3 mole & wt. of Al ₂ O ₃ formed = 3 2 102 & =153 gm aligned

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