3 nO_2(g) H_2o(l) = 2 hnO_3(l) no(g) suppose that 1 mol nO_2 and 3 H_2o mol combine and react completely. how many moles of the reactant in excess are present after the reaction has completed
A) 1 mole of H_2O is in excess.
B) 2 moles of H_2O are in excess.
C) 1 mole of NO_2 is in excess.
D) 2 moles of NO_2 are in excess.