The ammonium chloride is a compound with a low thermal stability. Upon heating ammonium chloride decomposes according to the equation:
Both compounds are gases, which form white smoke upon reaction in the gaseous state. Also there are no residue left after thermal decomposition of the ammonium chloride, so we can determine mass of the ammonium chloride:
Salt and sand does not decompose at the temperature of decomposition of ammonium chloride, so the mass percent of the ammonium chloride is:
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