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An changes saved2. Laughing gas (nitrous oxide, N₂O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to thefollowing reaction. \mathrm{NH}_{4} \mathrm{NO}_{3(\mathrm{~s} \dot{m}} \rightarrow \mathrm{N}_{2} \mathrm{O}_{(g)}+2 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})} \mathrm{NH}_{4} \mathrm{NO}_{3(\mathrm{~s})} \rightarrow \mathrm{N}_{2} \mathrm{O}_{(g)}+2 \mathrm{H}_{2} \mathrm{O}_{(1)}

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