Question

I had a question that said would butane sink to the floor or rise to the ceiling in air. I would say sink to the floor but I was googling this and several sites said it wouldn't completely sink and that it would float. Is this right? And if so how would I explain this?

My calculations:
air at STP = 1.292 g/L
butane gas (lab calc.) = 2.4 g/L

Answer 1

It sinks. Fill a balloon with butane from your lighter. Tie it off. It sinks like a rock.

Answer 2

OH
Thanks so much :)