Question

why should a magnesium ribbon be cleaned before burning in air?​

Answer 1

Answer:

magnesium ribbon be cleaned before burning in air becuse it can't react with o2 in the environment.

Answer 2

cause the magnesium ribbon gets coated with MgO beforehand when it reacts with air thereby it doesn't react with O2 on burning so it must be cleaned to remove the layer of magnesium oxide.

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