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Magnesium oxide (MgO) is formed. When a piece of magnesium ribbon is burnt it reacts with oxygen in air according to the chemical equation:

2Mg(s) + O2(g) → 2MgO(s)

The magnesium burns in a bright white light and the resulting magnesium oxide is in the form of a white powder.

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Q: What compound is formed when magnesium is burnt?
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