Ether is poured into the evacuated ampoule at a temperature of 18°C and sealed. What part of the ampoule must be filled with liquid so that, after heating to a critical temperature Tk = 467 K, the ether is in a critical state? The known values are Рк = 35.5 atm, density of liquid ether рж = 0.714 g/cm3, РH (18°С) = 400 mm Hg. Assume that the van der Waals gas model is applicable to the indicated ether.

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