How many moles of Mg are consumed when 0.34 moles oxygen gas completely reacts?

0.34 moles of oxygen consumed 0.68 moles of magnesium

Explanation:

Given dа ta:

Moles of magnesium = ?

Moles of oxygen = 0.34 mol

Chemical equation:

2Mg + O₂ → 2MgO

Now we will compare the moles of oxygen and magnesium:

O₂ : Mg

1 : 2

0.34 : 2*0.34 = 0.68 mol

Thus 0.34 moles of oxygen consumed 0.68 moles of magnesium.