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www.quora.com/What-types-of-gases-are-heavier-than-air

You can’t weight air. But you can find its density. Air density or mass per unit volume of Earth's atmosphere is, 1.225 [math]kgm^{-3}[/math]This is the density at the sea level at 15°C. Some gases are lighter than air like, Ammonia - [math]0.717k...

ianbgas.co.uk/technotes/Gases-heavier-or-lighter-than-air.html

We can now compare other gases with air. The main component of natural gas is methane, chemical symbol CH4 , which means that its molecules consist of a carbon atom attached to four hydrogen atoms, giving a total weight of 12 + 4 = 16. This is considerably less than the figure for air – methane is lighter than air.

boards.straightdope.com/sdmb/showthread.php?t=63829

Since the density of a gas at any given pressure and temperature depends almost entirely on its molecular weight, any gas with a molecular weight greater than Nitrogen (28) will be heavier than air. Common gases that are heavier than air include; Carbon dioxide,Oxygen and propane.

en.wikipedia.org/wiki/Lighter_than_air

Only certain lighter than air gases are suitable as lifting gases. Dry air has a density of about 1.29 g/L (gram per liter) at standard conditions for temperature and pressure (STP) and an average molecular mass of 28.97 g/mol, and so lighter than air gases have a density lower than this.

www.answers.com/Q/Name_all_gases_heavier_than_air

Gases tend to rise through liquids as liquids are conventionally heavier/denser than gases. A less dense gas will rise over a more dense gas, but gases do not necessarily always rise. sulphur ...

www.reference.com/science/list-gases-lighter-air-2ef84f0075c64098

Gases that are lighter than air include water vapor, methane, hot air, hydrogen, neon, nitrogen, ammonia and helium. These gases have a lower density than air, which causes them to rise and float in the atmosphere. Many lighter-than-air gases provide lifting power for airborne objects.

miningquiz.com/download/GasSpecificGravity.htm

The specific gravity of some common gases can be found in the table below: As a reference, normal air has a specific gravity of 1. If the specific gravity is greater than 1 the gas is heavier than air and the vapor will be found low; the larger the number the heavier the gas is and the lower vapors will be found.

www.osha.gov/OshDoc/data_Hurricane_Facts/hydrogen_sulfide_fact.pdf

2S gas Hydrogen sulfide is heavier than air and may travel along the ground. It collects in low-lying ... Some common names for the gas include sewer gas, stink damp, swamp gas and manure gas. It occurs naturally in crude petroleum, natural gas, ... 1. Air must be tested for the presence and

www.firehouse.com/rescue/article/10495996/evolution-of-an-hazmat-acronym

Ethylene is a common gas that is used to ripen fruit and it is also very flammable. Ethane is a heavier-than-air gas! In reality, the list of lighter than air materials was found to be incomplete ...

quizlet.com/15226160/res-125-medical-gas-flash-cards

Res 125 Medical Gas study guide by maryc123 includes 50 questions covering vocabulary, terms and more. ... O2 is slightly heavier than air. O2 is not very soluble in water. O2 is non flammable but supports combustion. ... are most common for adults and children, but currently used for children mostly. it is air conditioned or cooled with ice to ...