Recall that the partial pressure of a gas (PGas) in a mixture is given by:
χGas = mole fraction of the gas
Ptotal = total pressure of the gas mixture
Assume that an exhaled breath of air consists of 74.7 % N2, 15.4 % O2, 3.8 % CO2, and 6.1 % water vapor.
If the total pressure of the gases is 0.990 atm , calculate the partial pressure of O2.
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