a pyrotechnician mixes 280 G of black powder for a firework find the amount of oxygen carbon dioxide and sulfur dioxide generated when this firework burst if the oxygen oxidizing agent is a powder saltpeter​

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).

answer carbon and three oxygen atoms;