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Ores and Minerals

One mole of p...

Question

One mole of potassium chlorate is thermally decomposed and excess of aluminium is burnt in the gaseous product. How many moles of aluminium oxide are formed?

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Solution

The reactions are :

KClO₃ = 1/2 2KCl + 3/2O₂2Al + 3/2O_{2 =} 2Al₂O₃

3/2 moles of O₂ are formed from one mole of potassium chlorate and 2 moles of aluminium oxide are formed from 3/2 moles of oxygen.
The answer is 2 moles of aluminium oxide.

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