A cylinder contains hydrogen gas at pressure 249 kPa and temperature 27 . Its density is : (R = 8.3 J mol-1 K-1)
(1) 0.2 kg/m3
From the ideal gas equation PV = mMRT, the density is
= mV = PMRT
With P = 249 103 Pa, M = 2 10-3 kg mol-1 and T = 300 K,
= 249 103 2 10-38.3 300
= 4982490
= 0.2 kg/m3
Answer: (1)
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