0
I started looking for answers to this question. This is at standard air pressure at sea level. I assumed it would be radon, but surprisingly, carbon dioxide is denser. 1.98 kg/m^3
Anyone got a denser gas?
I found a question on Yahoo Answers, "At STP, what is the densest gas known?"
with this answer:
"WF6 (tungsten hexafluoride) is heavier than Radon (298 vs 222 gm/mole) and it is a gas at STP (boils at 17 C)
WF6 is used in the semiconductor industry to grow layers of tungsten on substrates.
Interestingly, ReF6 (rhenium hexafluoride) is slightly heavier (300 gm/mole) but is a liquid at STP, boiling at 34 C
Even heavier metals than Re are not hexavalent.
Compounds formed with chlorine -- such as WCl6 are not gasses at STP (WCl6 is a solid)
From Wikipedia:
Tungsten(VI) fluoride, also known as tungsten hexafluoride, is the inorganic compound with the formula WF6. This corrosive, colourless compound is the densest known gas at a pressure of 1 ATM and room temperature (25 °C).
From the same article, its density is 13.1 kg/m^3.
One person argued that UF6 is denser, but it is crystaline at room temperature.
What else can I help you with?
What is the least dense thing?
Hydrogen gas is considered the least dense element. It is less dense than air, which is why it is often used in balloons.
Is gas the most dense state of matter?
Gas is actually the least dense state of matter. In a gas, particles are spread out and have high energy causing them to move rapidly and take up a large volume. Solids are the most dense state because their particles are tightly packed together.
Why is gas so lightly dense?
Gas is less dense compared to liquids and solids because the molecules in a gas are much farther apart, allowing them to move freely and fill the container they are in. This results in low molecular attraction and less mass per unit volume, making gas less dense.
What determines if a balloon filled with a gas will rise or sink in the air?
A balloon filled with a gas will rise or sink depending on the density of the gas inside compared to the surrounding air. If the gas inside is less dense than the surrounding air, the balloon will rise. If the gas inside is more dense, the balloon will sink.
Is water vapor the most dense form of water?
i have read water has maximum density at temprature of 4 degree celsius...so water vapour is not most dense form of water.
What gas is the most or least dense when heated?
When heated, gases typically expand and become less dense. So, a gas would be least dense when heated.
Is cotton least dense?
'Least' is a comparison word. Compared to iron and lead yes cotton is least dense. Compares to oxygen gas and hydrogen gas, no it is not least dense.
What materials are the least dense?
Gas
What planet is has a big gas giant but the least dense of planet?
Saturn is the least dense planet in our solar system.
Why is it that the least dense of all substances is gas?
The molecules are farther apart in a gas.
What is the least dense thing?
Hydrogen gas is considered the least dense element. It is less dense than air, which is why it is often used in balloons.
In what order from most dense to least with water gas iron rock?
solid, liquid then gas
List 4 things from least dense to most dense?
Hydrogen (gas)Oxygen (gas)PumiceWater (liquid)GraniteSteelLeadGold
What planet is the least dense of the gas giants?
Saturn is the least dense of the gas giants, even out of all of the planets in our solar system. Its average density is around 0.7 g/cc (less than water).
Which type of planets are least dense?
Gas giants like Jupiter and Saturn are the least dense planets in our solar system. They are made up mostly of gases like hydrogen and helium, making their overall density much lower compared to rocky planets like Earth and Mars.
What State Of Matter Is The Least Dense water oil mercury or glass?
Oil will sink in water, so is the least dense.
What is the most dense state of matter to the least dense including solids liquids gases and plasmas?
The order is: - solid (the densest) - liquid - gas - plasma
