Nitric acid is produced commercially by the Ostwald process. The three steps of the Ostwald process are shown in the following equations.4 NH3(g) + 5 O2(g) -> 4 NO(g) + 6 H2O(g)2 NO(g) + O2(g) -> 2 NO2(g)3 NO2(g) + H2O(l) -> 2 HNO3(aq) + NO(g)What mass of NH3 must be used to produce 1×10^6 kg HNO3 by the Ostwald process, assuming 90% yield in each reaction?