A breathing mixture used by deep-sea divers contains helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen at 101.4 kPa ifpHe = 82.5 kPa and pCO2 = 0.4 kPa
Ptotal = PHe + PO2 + PCO2. You know total and CO2 and He. Calculate PO2.
18.5 kPa
Anonymous is right
To calculate the partial pressure of oxygen in the breathing mixture, you need to subtract the partial pressures of helium and carbon dioxide from the total pressure.
The partial pressure of oxygen, represented as pO2, can be calculated using the following formula:
pO2 = total pressure - pHe - pCO2
In this case, the total pressure is given as 101.4 kPa, the partial pressure of helium (pHe) is 82.5 kPa, and the partial pressure of carbon dioxide (pCO2) is 0.4 kPa.
Substituting these values into the formula, we have:
pO2 = 101.4 kPa - 82.5 kPa - 0.4 kPa
Calculating this expression, we get:
pO2 = 18.5 kPa
Therefore, the partial pressure of oxygen in the breathing mixture is 18.5 kPa.