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something that is lighter than the molecular mass of water.
Mr of water= 2(1)+16
=18
therefore, anything with a Mr of lesser than 18 will be lighter than water vapour.
example: hydrogen gas.
Mr of hydrogen gas= 2(1)
= 2
therefore, it is lighter than water vapour.
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∙ 16y ago
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∙ 12y agoThere are many out there, but one of the most common is Helium. Helium balloons float because the helium inside is lighter than air. However, helium is highly flammable and explosive, so be careful when using in experiments.
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∙ 13y agohelium
Answer:
At STP air has a molecular weight of 28.996. Any gas at STP with a lower molecular weight would be lighter than air. This would include acetylene, ammonia, carbon monoxide, deuterium, ethylene, helium, hydrogen, methane, neon, nitrogen, water vapor. Almost any gas could be made hot enough to be lighter than air at STP.
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∙ 14y agoMoist air is less dense than dry air at the the same temperature and pressure.
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∙ 12y agoHelium, Aerogel, Hot air, Hydrogen, Neon, Ammonia, Methane, Hydrogen Flouride.
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∙ 9y agoDepends on the size of the feather.
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∙ 13y agoHydrogen, Helium and also Nitrogen (just)
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∙ 15y agopaper
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∙ 13y agocotton
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∙ 12y agoair
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What does Smoke goes up on?
Being hot, it has expanded, and weighs less than the air it displaced.
A balloon fish that swallows air will float because it weighs less than what?
Water
How does a hot air balloon work?
Hot air balloons get their buoyancy from hot air created by a propane burner at the base of the balloon. Hot air is less dense than cold air and so weighs less. When the cold air that is displaced weighs more than the balloon, the balloon will rise. The balloons weight is controlled by turning the burner on and off when needed. The hot air is less dense than the outside air and so the balloon is squeezed upwards by the surrounding air. The air becomes less dense as more heat is applied, particles separate more and more when heat is applied. The more heat is applied the further apart and less dense the particles become.
Does natural gas weigh more or less than air?
It weighs less than air. Density of air is 1.2 kg/m3, density of methane is 0.72 kg/m3 (at standard temperature and pressure). Natural gas is mostly methane but does contain small amounts of heavier hydrocarbons, ethane, propane, and butane, but the mean density is still less than that of air.
Does air resistance keep a hot air balloon in the air?
No, hot air balloons are kept up in the air by buoyancy, the same thing that keeps helium balloons up in the air, or that keeps ships afloat. The hot air in the balloon is less dense than the surrounding air, so the balloon weighs less than the air it displaces, at least while the balloon is rising.
Air with lots of this weighs less than dry air?
water vapor.
Volume of warm air weighs less than an equal volume of cold air because?
It's less dense
Why does a swimming float float?
Because it has air in it. Air weighs less than water therefore air floats.
What weighs less than a feather?
air, a cookie crumb or a fruit fly
Why does an airship float in air?
An airship uses helium which weighs less than air, and it cancels out the weight of the airship. Hydrogen weighs even less than helium, but it is combustible, so helium is preferred for use in airships.
Air weighs less than water would you expect the pressure exerted by water to be greater or less than the pressure exerted by the same amount of air?
water is more dense than air and it has at
What does Smoke goes up on?
Being hot, it has expanded, and weighs less than the air it displaced.
A balloon fish that swallows air will float because it weighs less than what?
Water
A plant is placed in a sealed greenhouse with a fixed supply of water soil and air After a year the plant weighs 5 kg more than at the start of the experiment and what weighs almost 5 kg less?
The air in the room weighs almost 5 kg less.
Why does an innertube float?
An innertube floats for the same reason that a balloon filled with helium floats in the air. In a helium balloon the gas is lighter than the air. Air in an innertube weighs less than the water and therefore floats to the top. This is called buoyancy. It weighs less than the water but more than the air above the water due to the rubber of the tube. This is why it stays on the surface and does not float away into the sky.
What weighs less a kilogram or gram?
A gram weighs less than a kilogram.
Why do balloons float when you put helium in them?
The helium weighs less than air- so when the balloon is filled, it displaces the heavier air, and floats. Just as a bit of wood weighs less than water, and floats on water. In a vacuum, a helium filled balloon would not float (but it may pop)
