Ammonia is a gas for which reliable analytical methods are available to determine its concentration in other gases. To measure flow in a natural gas pipeline, pure ammonia gas is injected into the pipeline at a constant rate of 72.3 kg/min for 12 min. Five miles downstream from the injection point, the steady state ammonia concentration is found to be 0.382 weight percent.
The gas upstream from the point of ammonia injection contains no measurable ammonia
How many kilograms of natural gas are flowing through the pipelines per hour ( use different steps required in material balance calculations).