A mixture of air and 5 mol% ammonia gas flows into the absorption tower at 200 m3/h. Ammonia gas is removed using water, and the flow rate of water is 1,000 kmol/h. At this time, the temperature of the absorption tower is 25˚C and the pressure is 1 atmosphere. When the temperature of the exhaust gas after the absorption process is 20˚C and contains 0.2 mol% of ammonia, How many moles of ammonia are contained in 1000 kg of absorbent solution?

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