why should a magnesium ribbon be cleaned before burning in air and why is respiration considered as chemical change.
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Answer:
Explanation:
Magnesium ribbon must be cleaned before burning in air so that the the layer of magnesium oxide (which is formed due to reaction of magnesium with air) can be removed in order to get the desired chemical reaction.
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IT is high reactive an oxide layer formed upon it which is called MgO .
To remove oxygen layer we rub it .❤️
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