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When a sample of Mg(s) reacts completely with O2(g), the Mg(s) loses 5.0 moles of electrons. How many moles of electrons are gained by the O2(g)?

Respuesta :

Answer:

5 mols (c)

Explanation:

Eduard22sly

The number of mole of electrons gained by O₂ in the reaction is 5 moles

Balanced equation

2Mg(s) + O₂(g) → 2MgO(s)

From the balanced equation above,

2 moles of Mg reacted with 2 moles of O₂

How to determine the number of mole of electrons

From the balanced equation above,

2 moles of Mg reacted with 2 moles of O₂

Therefore,

5 moles of Mg will also react with 5 moles of O₂

Thus, we can conclude that when Mg loses 5.0 moles of electrons, O₂ will gain 5 moles of electrons

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