The root mean square speed of a gas of density 1.5 g/ litre at a pressure of 2×106N/m2 is .
The density of a gas is 1.5g/litre or 1.5kg/m3 and the pressure is 2×106N/m2.
The root mean square speed is given as,
¯c=√3Pρ
=√3×2×1061.5
=2×103m/s
Thus, the root mean square speed of gas is 2×103m/s