2. (1 pt) An F110 airplane engine is tested using JP4 fuel at 30% engine power. The fuel flow into the engine is 60 kg/hr. Inside the engine, the fuel is burned 96% efficiently (i.e., 96% of the fuel burns). For each kilogram of fuel burned, the engine releases 9.4 grams of NOx. The produced NOx consists of 6.7% NO and 93.3% NO2; thus, the molecular weight of the NOx will be the weighted average of the molecular weights of NO and NO2. If the engine exhausts 20 kg of total gases per hour (MW gases = 28 g/mol), calculate the concentration of NOx in the exhaust gas (ppm). =