Helping The others Realize The Advantages Of potassium cyanide and hydrochloric acid
The Vapor Density comparisons are only legitimate when the gas escaping is at the same temperature since the bordering air itself. If your chemical is escaping from a container where it was pressurized or refrigerated, it might first escape and behave for a weighty gasoline and sink while in the air (even though it's got a Vapor Density value below