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When a magnesium ribbon is heated in air the product former is heavier.on the other hand when potassium manganate(VII) is heated in air the product formed is lighter.Explian the difference iin observation

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Answer: On heating, Magnesium forms its oxide; while potassium manganate(VII) decomposes

Step-by-step explanation:

Magnesium Mg, on heating forms Magnesium oxide

2Mg(s) + O2(g) --> 2MgO

Potassium permanganate KMnO4, on heating decomposes to potassium manganate K2MnO4, manganese dioxide MnO2, and Oxygen gas O2.

2KMnO4 --> K2MnO4 + MnO2 + O2

The difference in observation is that, on heating, Magnesium forms its OXIDE as product; while potassium manganate(VII) decomposes, giving OFF most of its constituents and reducing its weight.

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