Natural gas is lighter than air and rises.
Is natural gas heavier than air
Xenon is more than 4.5 times heavier than air.
Moist air is heavier than dry air, because of the water.
No lighter things do not fall faster than heavier things. In a vacuum they will fall at the same speed. Normally the heavier thing will fall down faster because of its weight. Sometimes the lighter thing falls faster depending on the air resistance.
Yes, it is heavier than air.
I think it's heavier it hangs around on the bottom
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
Is natural gas heavier than air
Nitrous Oxide is heavier than air.
Helium is lighter than air
Xenon is more than 4.5 times heavier than air.
One is lighter and the other one is heavier. :D
Moist air is heavier than dry air, because of the water.
hydrogen
Some are heavier, but some are lighter. For example, methane rises but propane sinks.
No, it is heavier than air and will sink to the floor.
they are heavier than air hence why they don't fly unless in motion.