Two vessels A and B are of the same size and are at the same temperature. A contains 1 g of hydrogen and B contains 1 g of oxygen. If PA and PB are the pressures of the gases in A and B respectively, then PA/PB is:

A flask contains argon and chlorine gas mixture. The temperature of the mixture is 27 °C. The ratio of the root mean square speed of the molecules of the two gases vrms(Ar)vrms(Cl2) is: (Atomic mass of argon = 40.0 u and molecular mass of chlorine = 70.0 u)

If the root mean square speed of oxygen molecules at 300 K is approximately 483 m/s, what is the rms speed at 1200 K?