Multiple choice

At atmospheric pressure, a litre vessel contains a mixture of Helium and Nitrogen. If partial pressure of Nitrogen is 500 mm, the partial pressure of Helium will be:

  1. $500$ mm
  2. $260$ mm
  3. $760$ mm
  4. $1260$ mm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total pressure is 760 mm (atmospheric). Partial pressure of Nitrogen is 500 mm. Partial pressure of Helium = Total - Nitrogen = 760 - 500 = 260 mm.

AI explanation

Atmospheric pressure at sea level is equivalent to 760 mm of mercury, representing the total pressure of the gas mixture. According to Dalton's law of partial pressures, the total pressure is the sum of the partial pressures of the individual gases. Therefore, the partial pressure of Helium is the total pressure minus the partial pressure of Nitrogen, which is 760 minus 500, yielding 260 mm.

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