1. Solving a chemistry problem

2. A sample of ammonia water is transferred into an ampoule (the weight of the empty ampoule is 0.4252 g, the weight of the ampoule with the sample is 1.66222 g). The ammonia contained in the sample was absorbed by a solution of sulfuric acid. (Volume of acid solution 40.00 cm3, concentration 1.004 N). The acid residue that did not react with ammonia was titrated with 20.3 cm3 of 0.0650 N sodium hydroxide solution. Calculate the mass fraction of ammonia in the sample.2. A sample of ammonia water is transferred into an ampoule (the weight of the empty ampoule is 0.4252 g, the weight of the ampoule with the sample is 1.66222 g). The ammonia contained in the sample was absorbed by a solution of sulfuric acid. (Volume of acid solution 40.00 cm3, concentration 1.004 N). The acid residue that did not react with ammonia was titrated with 20.3 cm3 of 0.0650 N sodium hydroxide solution. Calculate the mass fraction of ammonia in the sample.