Identify the oxidation number of Al in Al2O3
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Answer:
+3
Explanation:
The rule used here is that the algebraic sum of the oxidation numbers of all the atoms a molecule is zero.
Al2O3
2× ( oxidation number of Al)+3× ( Oxidation number of O ) = 0
2× ( Oxidation number of Al) +3(−2)=0
2× ( oxidation number of Al) +6
∴ Oxidation number of Al =+3
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