1. A glass ampoule with a 2.010 g sample of nitric acid was broken in water containing 25.0 cm3 of a 1.010 mol/dm3 NaOH solution. The excess of NaOH remaining after the reaction was titrated with 5.02 cm3 of a 0.7470 mol/dm3 HCl solution. Find the percentage of HNO3 in acid and N2O5.

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