Limited and Excess Reactants Persent Yield

As we are making up a product, there always have a need of reactant.
Sometimes, it'll have excess quantity(it will be left over) or either limited reactant ( used up completely)
that determining those reactants are completely involving in the reaction or not.

Ex 1:)
How much of which reactant will be left over?
2.19 mole of H2 is reacted with 3.48 moles of Cl2 to form HCl.

1: We have to write down the equation  H2 + Cl2 => 2HCl (make sure it's balance!)
2: Convert H2 and Cl2 into HCl by using stoichiometry calculation.

2.19 mole of H2x _2_mole of HCl    = 4.38 moles of HCl       (Limited reactant as it's less than Cl2)
                               1mole of H2

3.48 mole of Cl2x  2_mole of HCl     = 6.96 moles of HCl       (Excess quantity as it's more than H2)
                               1  mole of Cl2

3: Calculate the different between them.    6.96 - 4.38 = 2.58 (it'll be the final answer of the left over)