{TAIL ~ The fluorocarbon vapor} is more dense than {HEAD ~ the air} within the chamber and is not miscible with that air 
{ TAIL ~ The fluorocarbon vapor } is more dense than { HEAD ~ the air } within the chamber and is not miscible with that air
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH