Ascuba tank has a volume of 2000 cm3 . for very deep dives, the tank is filled with 50% (by volume) pure oxygen and 50% pure helium.

a.) how many molecules are there of each type in the tank if it is filled at 25 ∘c to a gauge pressure of 19 atm ?

express your answers using two significant figures. enter your answers numerically separated by a comma.

b.) what is the ratio of the average kinetic energies of the two types of molecule?

c.) what is the ratio of the rms speeds of the two types of molecule?