Question

How many moles of magnesium chloride can be produced with 3 moles of chlorine?

Answer 1

From the reaction equation:
1 mole of Cl2 (chlorine) is used to produce 1 mole of MgCl2 (magnesium chloride);
So 3 moles of Cl2 is used to produce X moles of MgCl2
X=1*3/1=3 (moles)
Answer: 3 moles