During the Volcanic Eruption of Mt $\degree$ CIf the Air Temperature Was 20

Short Answer

During the volcanic eruption of Mt.Pelee in 1902,an incredibly hot "burning cloud" rolled down the mountain and incinerated the town of Saint-Pierre.From the damage done,the temperature in the cloud was estimated at 700 $\degree$ C.If the air temperature was 20 $\degree$ C and a mole of air is 29 grams,estimate the molecular weight of the gas in the "burning cloud" that made it heavier than the surrounding air.(As a follow-on,estimate the most probable composition of the cloud.Some typical volcanic gases are H₂S,SO₂,H₂SO₄,CO₂,NO. )