- #1
Loren Booda
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What room-temperature gas has the greatest molecular weight?
shrumeo said:Since we're talking metal fluorides, PtF6 = 309 g/mol
The gas with the greatest molecular weight is uranium hexafluoride (UF6) with a molecular weight of 352 g/mol.
The molecular weight of a gas affects its behavior by influencing its density and how it interacts with other molecules. Heavier gases with higher molecular weights tend to be denser and move slower, while lighter gases with lower molecular weights move faster and spread out more easily.
In addition to uranium hexafluoride, other common gases with high molecular weights include sulfur hexafluoride (SF6), xenon (Xe), and radon (Rn).
Yes, the molecular weight of a gas can change if it undergoes a chemical reaction or if it is exposed to extreme temperatures or pressures. However, the molecular weight of a pure gas is constant.
The molecular weight of a gas is calculated by adding the atomic weights of all the elements in its chemical formula. The atomic weights can be found on the periodic table of elements.