Nitric acid (HNO3) that is used industrially for a variety of reactions can be produced by the reaction of ammonia (NH3) with air by the following overall reaction: NH3 + 02 → HNO3 + H2O The product gas from such a reactor has the following composition (on a water-free basis):

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Steady State Model

The steady-state model typically states that the entire universe is always enlarging, although it balances a fixed average density and matter that is being constantly generated to make new galaxies, star forms at a similar rate that the previous ones get indistinguishable due to the growing range and velocity of recession.