Calculate the Pressures of H2 and He: Are answers correct?

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SUMMARY

The discussion focuses on calculating the partial pressures of hydrogen (H2) and helium (He) in a 1.0 L balloon at 27°C, using 1.00 g of each gas. The calculated partial pressure of H2 is confirmed to be 12.315 atm, while He's partial pressure is 6.158 atm. Additionally, the mole fraction of He in the mixture is to be determined, starting with the calculation of the moles of each gas present.

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  • Familiarity with partial pressure concepts
  • Basic skills in stoichiometry
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A mixture of 1.00 g of H2 and 1.00 g of He is placed in a balloon of volume 1.0 L when filled with these gases at 27 deg C.

A) calculate the partial pressure of each gas and the total pressure

pressure of H2-12.315 atm?
pressure of He-6.158 atm?

B) calculate the mole fraction of He in the mixture.


I need help with B
 
Physics news on Phys.org
(A) Looks right

(B) Start with how many moles of each gas are present.
 

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