what is the the r.m.s speed of a mist particle of mass 10-15 kg at 300 k Share with your friends Share 0 Akanksha C. answered this Dear Student, Dear Student,Rms speed ( Vrms ) = 3RT MR = Molar gas constant = 8.314 J K−1 mol−1T = Temperature = 300 KM = molar mass = 1015 KgRms speed ( Vrms ) =3×8.314×300 1015 =2.7 ×10-13 m sec-1 2 View Full Answer