State Dalton law of partial pressure 10.0g of N2, 10.0g O2, and 8.0g of He are placed in a 5.0L that has been cooled to 9.5°C what is the partial pressure of each gas within the flaskas well as the total gas pressure
The total pressure is the sum of the partial pressures of each gas.
pN2 = nRT/V where n = grams of gas/molar mass of the gas
pHe = nRT/V
pO2 = nRT/V
Then Ptotal = pN2 + pHe + pO2
Post your work if you get stuck.