Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor: 4 NH3 + 5 O2 4 NO + 6 H2O When 50.0 g NH3 and 40.0 g O2 are allowed to react, what is the mass of the remaining excess reagent? Hydrogen chloride gas can be prepared by the following reaction: 2 NaCl(s) + H2SO4(aq) 2 HCl(g) + Na2SO4(s) How many grams of HCl can be prepared from 3.00 mol H2SO4 and 225 g NaCl? What is the theoretical yield of vanadium, in moles, that can be produced by the reaction of 4.0 mole of V205 with 12.0 mole of calcium based on the following chemical reaction? V2O5(s) + 5 Ca(1) + 2 V(1) + 5 Cao(s)