when magnesium is rubbed with sandpaper is it to remove layer of magnesium oxide or magnesium carbonate?
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Magnesium ribbon should be cleaned with sandpaper before burning in the air. It should be cleaned before burning due to the following reasons: Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.
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to remove the layer of magnesium carbonate..
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