A gaseou mixture contains 9.6% NH3, 22.6% N2 and 67.8% H2 gases. If the total pressure Is 5O atm, then the partial pressure of H2 is

Correct answer: C. 67.8 X 50/ 100

  • A. 67.8 x100 / 50
  • B. 50 x 100 / 100
  • C. 67.8 X 50/ 100
  • D. 67.8 +50/ 100

Explanation

To find the partial pressure of H2, we need to calculate the pressure contributed by H2 gas based on its percentage in the mixture. Given: Percentage of H2 = 67.8% Total pressure = 50 atm To find the partial pressure of H2, we multiply the percentage of H2 by the total pressure and divide by 100: Partial pressure of H2 = (67.8 × 50) / 100 Or Partial pressure of H2 = 33.9 atm

This question appeared on the UHS MDCAT 2022 paper, which you can sit online with every answer explained.

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About Ideal Gas Equation

The ideal gas equation, PV = nRT, relates pressure, volume, amount and absolute temperature when gas particles are assumed to have negligible volume and no intermolecular forces. Applications include finding molar mass, density or an unknown gas variable, with careful use of Kelvin temperature and consistent units, and comparison with real-gas behaviour.

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