10th grade Dalton's law of partial pressures worksheet

Dalton's law of partial pressures

Grade 10 Science Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Dry air at 101.325 kPa is 78.084% nitrogen (NOAA). What is the partial pressure of nitrogen, to 0.01 kPa, Esme?
2. 2.

   A bike tire's air is at 300 kPa (absolute) and is 20.946% oxygen (NOAA). What is the partial pressure of oxygen, to 0.01 kPa, Jun?
3. 3.

   A bike tire holds air at 400 kPa (absolute). About what is the partial pressure of O₂ in it, at 20.946%, Kira?

   • About 83.8 kPa
   • About 20.9 kPa
   • About 312.3 kPa, the N₂ share
4. 4.

   A car tire on a hot day holds air at 350 kPa (absolute). About what is the partial pressure of N₂, at 78.084%, Luz?

   • About 73.3 kPa, the O₂ share
   • About 78.1 kPa
   • About 273.3 kPa
5. 5.

   Humid air can be up to about 4% water vapor (NOAA). At 101.325 kPa, about what is that water vapor's partial pressure, Noah?

   • About 40.5 kPa
   • About 97.3 kPa, the other gases' share
   • About 4.05 kPa
6. 6.

   When humid air holds 4% water vapor, NOAA puts nitrogen at about 74.96%. Why is that below 78.084%, Pia?

   • Humid air holds more nitrogen, not less
   • The water vapor takes part of the total, so the other shares shrink
   • Water vapor turns some nitrogen into oxygen
7. 7.

   N₂ 79.12 kPa, O₂ 21.22 kPa, argon 0.95 kPa and CO₂ 0.04 kPa. What total do they give, Ren?

   • About 100.34 kPa, leaving out argon and CO₂
   • About 101.33 kPa, close to 1 atm
   • About 79.12 kPa, the N₂ alone
8. 8.

   Two tanks of the same volume and temperature each hold 2 mol of gas: one O₂, one CO₂. How do their pressures compare, Tala?

   • The CO₂ tank's is higher, since CO₂ is heavier
   • The O₂ tank's is higher, since O₂ moves faster
   • They are equal: same moles, volume and temperature
9. 9.

   Adding 1 mol of argon to a sealed box of 1 mol of N₂ at the same temperature does what to the total pressure, Zee?

   • It rises more than double, since argon is heavier
   • Nothing, since argon is a noble gas
   • It doubles, since the moles double
10. 10.

    In a gas mix, which gas has the largest partial pressure, Ari?

    • The gas listed first on the label
    • The gas with the most moles
    • The gas with the heaviest particles