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A scuba tank has a volume of 2000 cm3 . For very deep dives, the tank...

A scuba 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?

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