According to the kinetic theory of gases,
P = (1/3)*(density)*V^2
where P is the pressure.
That formula can be used for the root-mean-square speed, Vrms.
Vrms = sqrt[3P/(density)]
The most probable velocity is somewhat different; it is lower by a factor sqrt(2/3) = 0.8165
See
http://www.tutorsonnet.com/chemistry_homework_help/physical_chemistry/gaseous_state/finding_velocity_of_gas_assignment_help_tutoring.htm
определить наиболее вероятную скорость молекул газа, плотность которого составляет ρ= 0,35 кг/m³ при давлении p= 40 кПа.
determine the most probable velocity of the gas molecules, whose density is ρ = 0,35 kg / m³ at a pressure of p = 40 kPa.
1 answer
1 answer