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A cylinder contains hydrogen gas at pressure of 249 kPa and temperature $27^\circ C$. Its density is: ($R=8.3\ J\,mol^{-1}K^{-1}$)
A
$0.2\ kg/m^3$
B
$0.1\ kg/m^3$
C
$0.02\ kg/m^3$
D
$0.5\ kg/m^3$