Find the rms speed for an argon atom if 1.5 mol of the gas is confined to a 5.6 liter container at a pressure of 5.5 atm.
PV = nRT
RT = PV/n
v_RMS = \sqrt (3RT/M)
= \sqrt (3PV/nM)
= \sqrt ((3 * (5.5atm * 101.325kPA/atm) * (5.6 * 10^-3 m^3) / (1.5 mol * 39.948 * 10^-3)
= 12.5 m/s
However...