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Tungsten hexafluoride is the heaviest known gas under standard conditions. Using the heaviest primordial nuclides of its elements, its molar mass will be approximately equal to 186 + 6 × 19 = 300.

It is also the prize for correctly answering the first three questions in some national editions of the game show Who Wants to Be a Millionaire? in the respective local currency, and the prize for correctly answering the first four questions in the German game show Wer wird Millionär? in euros.

It's also the name of a film released in 2006.

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