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Air is mostly nitrogen, which has a molecular weight of about 28 amu. The presence of oxygen and other gases brings the average up somewhat, so we can take 29-30 g/mol as a reasonable estimate for dry air.
Acetone has a molecular weight of 62.
For two gases at the same temperature and pressure, the density depends only on the molecular mass. So acetone vapor is more than twice as dense as than air at the same temperature and pressure.
Incidentally, applying this same reasoning to methane (molecular weight 16) indicates that it is lighter than air, and a toy balloon filled with natural gas (which is mostly methane) will indeed float ... but only just barely, because the difference in density is small enough that the weight of the balloon itself almost cancels out the buoyancy of the methane.
What else can I help you with?
Is ozone lighter than air?
Yes, ozone is lighter than air.
What happens because water vapor molecules are lighter than nitrogen or oxygen molecules?
Water vapor molecules rise in the atmosphere, causing them to form clouds and ultimately precipitation. This is because lighter molecules have more kinetic energy and therefore move faster, allowing them to rise above the heavier nitrogen and oxygen molecules.
Why acetone evaporates faster than chloroform and benzene?
Acetone evaporates faster than chloroform and benzene because it has a lower boiling point and higher vapor pressure. This means acetone molecules have more kinetic energy, allowing them to overcome intermolecular forces and escape into the air more readily. Chloroform and benzene have stronger intermolecular forces, requiring more energy to break these bonds and evaporate.
Why does acetone evaporate so fast?
Acetone evaporates faster than alcohol and water because alcohol and water contain intermolecular hydrogen bonding but acetone does not. This is the reason alcohol and water have higher boiling point than acetone and evaporate slower than it.
Is amonia lighter than air?
Ammonia is lighter than air. It has a lower density than air, so it can rise and disperse in the atmosphere.
Is ethanol vapor lighter than air?
No, it has a higher molecular mass (46 g/mol) than air (28.7 g/mol)
What happens when water vapor is lighter than nitrogen or oxygen?
Water vapor is a gas so it is in the air. Nitrogen and nitrogen are in the air too, but there is more nitrogen than anything in the air. I believe it rises because it is lighter, like a balloon filled with helium.
Is solvent naphtha vapor lighter than air?
Yes, solvent naphtha vapor is lighter than air. This means that it will tend to rise and disperse upwards in the atmosphere. It is important to handle solvent naphtha with care to prevent accidental exposure or inhalation.
Is methane heavier than air?
Yes, methane is lighter than air. Methane gas has a molar mass of approximately 16 g/mol, which is lighter than the average molar mass of air (about 29 g/mol). This means that methane will tend to rise and disperse in the atmosphere rather than sink.
Why is moist air associated with low air pressure?
Warm, moist, humid, air associated with a low pressure system is actually lighter than dry air - owing to the fact that hydrogen molecules in water vapor (H20) are lighter than Oxygen or Nitrogen molecules. This moist air rises - causing air pressure to be relatively low compared to surrounding air.
Is moist air heavier or lighter than dry air?
Moist air is heavier than dry air, because of the water.
Is Gasoline Large Molecule Lighter than air?
Gasoline is a mixtures so the is not particular molecules that can be identified as gasoline. But most of the components are denser than air even in the vapor phase.
Why is water heavy yet the elements in it are either air or lighter than air?
Water isn't "heavy." Liquid water is more dense than air, yes, but water vapor is (significantly) lighter than air. Water is a liquid at temperatures far higher than what might be expected based on its molecular weight because of hydrogen bonding.
Is ozone lighter than air?
Yes, ozone is lighter than air.
Which air is heavier dry or wet?
Moist air means that there is more water vapor in a given amount of air than there is when the air is dry. Water vapor is less dense than dry air, so if there's less dry air and more water vapor, the air weighs less (if you don't change its altitude).
How many times lighter is hydrogen than air?
HYDROGN IS 14 TIMES LIGHTER THAN AIR.
What percentage of hydrogen is lighter than air?
100% of hydrogen is lighter than air
