56. Solving a chemistry problem
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11. 25 ml of sodium hydroxide solution with Т(NaOH) = 0.008922 g/ml was added to the (NH4)2SO4 solution. Ammonia was removed by boiling, and 8.65 ml of hydrochloric acid solution T(HCl) = 0.007236 g/ml was used to titrate the remaining alkali. Calculate the mass of (NH4)2SO4.
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