Chemistry

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Potassium hypobromite, KOBr, converts ammonia to nitrogen by the following reaction.
3KOBr + 2NH3 N2 + 3KBr + 3H2O
To prepare 448.2 mL of dry N2, when measured at 22.3 °C and 777.3 torr, what is the minimum number of grams of KOBr required?

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