6. The root mean square speed of hydrogen molecules of an ideal hydrogen gas kept in a gas chamber at

0°C is 3180 metres/second. The pressure on the hydrogen gas is  (Density of hydrogen gas is 8.99×10^-2 kg/m³  , 1 atmosphere  =1.01×10⁵ N/m²

(a) 1.0 atm                                      (b)  1.5 atm

(c)   2.0 atm                                   (d)  3.0 atm

Answer-d