Dalton’s Law of Partial Pressures Worksheet - Answer Key
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- What does Dalton’s law of partial pressures state?
For a mixture of gases in a container, the total pressure exerted is the sum of the pressures that each gas would exert if it were alone.
- What is a mole fraction?
χa = moles of a = partial pressure of a
total moles total pressure
which in turn yields…
Pa = χa (Ptotal)
- If 1.83 g of hydrogen gas and 2.42 g of helium exerts a total pressure of 0.480 atm, what is the partial pressure of each gas?
PH2 = 0.288 atm
PHe = 0.192 atm
- A sample of N2 (g) was collected over water at 20.0oC and a total pressure of 1.04 atm. A total volume of 3.25 x 102 mL was collected. What mass of N2 (g) was collected? (at 20.0oC the vapor pressure of water is 17.5 torr)
0.386 g N2