Question

If 4.0 moles of X and 4.0 moles of Y react according to the hypothetical reaction below, how many moles of the excess reactant will be left over at the end of the reaction?

2 X + 3 Y X2Y3

2.7 mol X left over

2.7 mol Y left over

1.3 mol X left over

1.3 mol Y left over