Select the correct statement regarding the following balanced equation

2mg + o2 > 2mgo

1)3 moles of mg will produce 6moles of mgo

2)when 100 grams of mg reacts with excess o2, 100 grams of mgo forms

3)for every mole of mgo produced, half the number of moles of o2 is consumed

4) 8 moles of o2 requires 4 moles of mg in order to react completely