In the following questions solve the case explain in detail.
(1) In rust formula fe²o³ why ² and ³ are represented in formula?
(2) In magnesium oxide describe why oxide is represented in formula? explain.
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- Iron metal does not burn in dry air even on strong heating. In moist air iron is slowly oxidised to give rust (iron oxide).
- Magnesium has an oxidation number of +2 (in group II, therefore having a lone pair of electrons. Oxygen on the other hand, are missing two electrons to complete its valence orbital (to have eight electrons).
Therefore, both atoms need each other in a 1:1 ratio >> MgO
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