Final answer:
The student's question concerns calculating partial pressures, total pressure, and mole fraction for a gas mixture in a scuba tank, using the Ideal Gas Law and given volumes and pressures of O2 and He.
Step-by-step explanation:
The student has asked for assistance with calculating various properties related to gas mixtures, specifically concerning a diving shop scenario where specific volumes of O2 and He are mixed in a tank using the Ideal Gas Law. To find the partial pressures, total pressure, and mole fraction, we use the Ideal Gas Law equation PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the ideal gas constant, and T is temperature.
By rearranging the equation and using the given volumes and pressures, we can solve for the unknown variables. For example, to find the partial pressure of each gas, we would use the equation P1V1 = P2V2 where we know the initial conditions (P1 and V1) and we are solving for the final pressure P2.