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To solve the given chemical equations, we need to identify the products: a) \( \text{NH}_3 + \text{H}_2\text{SO}_4 (\text{конц.}) \rightarrow \text{(NH}_4)_2\text{SO}_4 \) When concentrated sulfuric acid reacts with ammonia, ammonium sulfate is produced. b) \( \text{NH}_3 + \text{HCl} (\text{конц.}) \rightarrow \text{NH}_4\text{Cl} \) Ammonia reacts with concentrated hydrochloric acid to form ammonium chloride. c) \( \text{NH}_3 + \text{HNO}_3 (\text{конц.}) \rightarrow \text{NH}_4\text{NO}_3 \) Concentrated nitric acid reacting with ammonia results in ammonium nitrate. These reactions involve the neutralization of ammonia with the corresponding acids to form ammonium salts.