Ammonia is a gas for which reliable analytical methods are available to determine itsconcentration in other gases. To measure the flow rate in a natural-gas pipeline, pure ammoniagas in injected in the pipeline at a rate of 72.3 Kg/min. Five miles downstream from the injectionpoint the steady-state ammonia concentration was found to be 0.382 wt%. The gas upstreamfrom the point of ammonia injection contains no measurable ammonia. How many Kg of naturalgas are flowing through the pipeline per hour?