Suppose that 5.0 moles of NO2 and 1.0 mole of H2O combine and react completely. Identify the limiting reactant (LR).?
How many moles of the excess reactant are present after the following reaction has completed?
How many moles of the excess reactant are present after the following reaction has completed?
Roger the Mole
Supposing the reaction to be:
3 NO2 + H2O → 2 HNO3 + NO
1.0 mole of H2O would react completely with 1.0 x (3/1) = 3.0 moles of NO2, but there is more NO2 present than that, so NO2 is in excess and H2O is the limiting reactant.
(5.0 mol NO2 initially) - (3.0 mol NO2 reacted) = 2.0 mol NO2 left over