First, calculate the number of moles of O2 and He present in the tank:
Molar mass O2 = 16 g/mol x 2 = 32 g/mol
Molar mass He = 4.0 g/mol
A deep-sea diver uses a gas cylinder with a volume of 10.0 L and a content of 51.3 g of O2 and 32.7 g of He.
Calculate the partial pressure of each gas and the total pressure if the temperature of the gas is 19 oC.
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