Final answer:
The stoichiometric ratio of magnesium to magnesium oxide formed when magnesium burns in air is 2:1.
Step-by-step explanation:
The stoichiometric ratio of magnesium to magnesium oxide formed when magnesium burns in air is 2:1. This means that for every 2 moles of magnesium, 1 mole of magnesium oxide is formed.
The balanced chemical equation for the reaction is:
2Mg + O₂ -> 2MgO
From the equation, we can see that 2 magnesium atoms combine with 1 oxygen molecule to produce 2 units of magnesium oxide.
The information given in option a, b, c, and d is not relevant to determining the stoichiometric ratio of magnesium to magnesium oxide.