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The boiling point does not affect the calculation. Treat He as an ideal gas at 5.2 K.
30 g is 7.5 moles. That would occupy 7.5*22.4 = 168 liters at 273K and 1 atm. At 5.2K and 1 atm, the volume is 5.2/273 times less, due to the lower temperature.