A tank of volume 0.02 m^3 contains 0.20 kg of helium at 27 oC.
(a) How many moles of helium are present? (hint: the relative atomic mass in grams is one mole)
(b) Calculate the pressure of the gas in Pa. The universal molar gas constant R = 8.31 J K–1 mol–1
(a)
(b)
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